diff --git a/.gitignore b/.gitignore
index b084ac14ecc28..54604cdbd35a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@ tests/baselines/rwc/*
 tests/baselines/reference/projectOutput/*
 tests/baselines/local/projectOutput/*
 tests/baselines/reference/testresults.tap
+tests/baselines/symlinks/*
 tests/services/baselines/prototyping/local/*
 tests/services/browser/typescriptServices.js
 src/harness/*.js
diff --git a/src/harness/harnessLanguageService.ts b/src/harness/harnessLanguageService.ts
index 3bab845bbdd7c..122a102fff449 100644
--- a/src/harness/harnessLanguageService.ts
+++ b/src/harness/harnessLanguageService.ts
@@ -398,6 +398,7 @@ class SessionServerHost implements ts.server.ServerHost {
         "watchedFiles",
         "watchedDirectories",
         ts.createGetCanonicalFileName(this.useCaseSensitiveFileNames),
+        this,
     );
 
     constructor(private host: NativeLanguageServiceHost) {
diff --git a/src/harness/watchUtils.ts b/src/harness/watchUtils.ts
index 8e9a1bc552d3b..fd0201f28b20f 100644
--- a/src/harness/watchUtils.ts
+++ b/src/harness/watchUtils.ts
@@ -1,5 +1,4 @@
 import {
-    addRange,
     arrayFrom,
     compareStringsCaseSensitive,
     contains,
@@ -10,6 +9,7 @@ import {
     GetCanonicalFileName,
     MultiMap,
     PollingInterval,
+    System,
 } from "./_namespaces/ts";
 
 export interface TestFileWatcher {
@@ -25,7 +25,7 @@ export interface TestFsWatcher<DirCallback> {
 export interface Watches<Data> {
     add(path: string, data: Data): void;
     remove(path: string, data: Data): void;
-    forEach(path: string, cb: (data: Data) => void): void;
+    forEach(path: string, cb: (data: Data, path: string) => void): void;
     serialize(baseline: string[]): void;
 }
 
@@ -44,6 +44,7 @@ export function createWatchUtils<PollingWatcherData, FsWatcherData>(
     pollingWatchesName: string,
     fsWatchesName: string,
     getCanonicalFileName: GetCanonicalFileName,
+    system: Required<Pick<System, "realpath">>,
 ): WatchUtils<PollingWatcherData, FsWatcherData> {
     const pollingWatches = initializeWatches<PollingWatcherData>(pollingWatchesName);
     const fsWatches = initializeWatches<FsWatcherData>(fsWatchesName);
@@ -64,6 +65,8 @@ export function createWatchUtils<PollingWatcherData, FsWatcherData>(
         const actuals = createMultiMap<string, Data>();
         let serialized: Map<string, Data[]> | undefined;
         let canonicalPathsToStrings: Map<string, Set<string>> | undefined;
+        let realToLinked: MultiMap<string, string> | undefined;
+        let pathToReal: Map<string, string> | undefined;
         return {
             add,
             remove,
@@ -73,40 +76,69 @@ export function createWatchUtils<PollingWatcherData, FsWatcherData>(
 
         function add(path: string, data: Data) {
             actuals.add(path, data);
-            if (actuals.get(path)!.length === 1) {
-                const canonicalPath = getCanonicalFileName(path);
-                if (canonicalPath !== path) {
-                    (canonicalPathsToStrings ??= new Map()).set(
-                        canonicalPath,
-                        (canonicalPathsToStrings?.get(canonicalPath) ?? new Set()).add(path),
-                    );
-                }
+            if (actuals.get(path)!.length !== 1) return;
+            const canonicalPath = getCanonicalFileName(path);
+            if (canonicalPath !== path) {
+                (canonicalPathsToStrings ??= new Map()).set(
+                    canonicalPath,
+                    (canonicalPathsToStrings?.get(canonicalPath) ?? new Set()).add(path),
+                );
+            }
+            const real = system.realpath(path);
+            (pathToReal ??= new Map()).set(path, real);
+            if (real === path) return;
+            const canonicalReal = getCanonicalFileName(real);
+            if (getCanonicalFileName(path) !== canonicalReal) {
+                (realToLinked ??= createMultiMap()).add(canonicalReal, path);
             }
         }
 
         function remove(path: string, data: Data) {
             actuals.remove(path, data);
-            if (!actuals.has(path)) {
-                const canonicalPath = getCanonicalFileName(path);
-                if (canonicalPath !== path) {
-                    const existing = canonicalPathsToStrings!.get(canonicalPath);
-                    if (existing!.size === 1) canonicalPathsToStrings!.delete(canonicalPath);
-                    else existing!.delete(path);
-                }
+            if (actuals.has(path)) return;
+            const canonicalPath = getCanonicalFileName(path);
+            if (canonicalPath !== path) {
+                const existing = canonicalPathsToStrings!.get(canonicalPath);
+                if (existing!.size === 1) canonicalPathsToStrings!.delete(canonicalPath);
+                else existing!.delete(path);
+            }
+            const real = pathToReal?.get(path)!;
+            pathToReal!.delete(path);
+            if (real === path) return;
+            const canonicalReal = getCanonicalFileName(real);
+            if (getCanonicalFileName(path) !== canonicalReal) {
+                realToLinked!.remove(canonicalReal, path);
             }
         }
 
-        function forEach(path: string, cb: (data: Data) => void) {
-            let allData: Data[] | undefined;
-            allData = addRange(allData, actuals.get(path));
+        function getAllData(path: string) {
+            let allData: Map<string, Data[]> | undefined;
+            addData(path);
             const canonicalPath = getCanonicalFileName(path);
-            if (canonicalPath !== path) allData = addRange(allData, actuals.get(canonicalPath));
+            if (canonicalPath !== path) addData(canonicalPath);
             canonicalPathsToStrings?.get(canonicalPath)?.forEach(canonicalSamePath => {
                 if (canonicalSamePath !== path && canonicalSamePath !== canonicalPath) {
-                    allData = addRange(allData, actuals.get(canonicalSamePath));
+                    addData(canonicalSamePath);
                 }
             });
-            allData?.forEach(cb);
+            return allData;
+            function addData(path: string) {
+                const data = actuals.get(path);
+                if (data) (allData ??= new Map()).set(path, data);
+            }
+        }
+
+        function forEach(path: string, cb: (data: Data, path: string) => void) {
+            const real = system.realpath(path);
+            const canonicalPath = getCanonicalFileName(path);
+            const canonicalReal = getCanonicalFileName(real);
+            let allData = canonicalPath === canonicalReal ? getAllData(path) : getAllData(real);
+            realToLinked?.get(canonicalReal)?.forEach(linked => {
+                if (allData?.has(linked)) return;
+                const data = actuals.get(linked);
+                if (data) (allData ??= new Map()).set(linked, data);
+            });
+            allData?.forEach((data, path) => data.forEach(d => cb(d, path)));
         }
 
         function serialize(baseline: string[]) {
diff --git a/src/testRunner/tests.ts b/src/testRunner/tests.ts
index 01d5ddea11d4d..9857f6b7fb2d7 100644
--- a/src/testRunner/tests.ts
+++ b/src/testRunner/tests.ts
@@ -65,6 +65,7 @@ import "./unittests/services/preProcessFile";
 import "./unittests/services/textChanges";
 import "./unittests/services/transpile";
 import "./unittests/services/utilities";
+import "./unittests/sys/symlinkWatching";
 import "./unittests/tsbuild/amdModulesWithOut";
 import "./unittests/tsbuild/clean";
 import "./unittests/tsbuild/commandLine";
diff --git a/src/testRunner/unittests/helpers/tscWatch.ts b/src/testRunner/unittests/helpers/tscWatch.ts
index 554c3fc37b0f3..04e74a2977eb9 100644
--- a/src/testRunner/unittests/helpers/tscWatch.ts
+++ b/src/testRunner/unittests/helpers/tscWatch.ts
@@ -45,7 +45,6 @@ export interface TscWatchCompileChange<T extends ts.BuilderProgram = ts.EmitAndS
         watchOrSolution: WatchOrSolution<T>,
     ) => void;
     // TODO:: sheetal: Needing these fields are technically issues that need to be fixed later
-    symlinksNotReflected?: readonly string[];
     skipStructureCheck?: true;
 }
 export interface TscWatchCheckOptions {
@@ -220,7 +219,7 @@ export function runWatchBaseline<T extends ts.BuilderProgram = ts.EmitAndSemanti
     });
 
     if (edits) {
-        for (const { caption, edit, timeouts, symlinksNotReflected, skipStructureCheck } of edits) {
+        for (const { caption, edit, timeouts, skipStructureCheck } of edits) {
             applyEdit(sys, baseline, edit, caption);
             timeouts(sys, programs, watchOrSolution);
             programs = watchBaseline({
@@ -233,7 +232,6 @@ export function runWatchBaseline<T extends ts.BuilderProgram = ts.EmitAndSemanti
                 caption,
                 resolutionCache: !skipStructureCheck ? (watchOrSolution as ts.WatchOfConfigFile<T> | undefined)?.getResolutionCache?.() : undefined,
                 useSourceOfProjectReferenceRedirect,
-                symlinksNotReflected,
             });
         }
     }
@@ -254,7 +252,6 @@ export interface WatchBaseline extends BaselineBase, TscWatchCheckOptions {
     caption?: string;
     resolutionCache?: ts.ResolutionCache;
     useSourceOfProjectReferenceRedirect?: () => boolean;
-    symlinksNotReflected?: readonly string[];
 }
 export function watchBaseline({
     baseline,
@@ -266,7 +263,6 @@ export function watchBaseline({
     caption,
     resolutionCache,
     useSourceOfProjectReferenceRedirect,
-    symlinksNotReflected,
 }: WatchBaseline) {
     if (baselineSourceMap) generateSourceMapBaselineFiles(sys);
     const programs = getPrograms();
@@ -279,7 +275,13 @@ export function watchBaseline({
     // Verify program structure and resolution cache when incremental edit with tsc --watch (without build mode)
     if (resolutionCache && programs.length) {
         ts.Debug.assert(programs.length === 1);
-        verifyProgramStructureAndResolutionCache(caption!, sys, programs[0][0], resolutionCache, useSourceOfProjectReferenceRedirect, symlinksNotReflected);
+        verifyProgramStructureAndResolutionCache(
+            caption!,
+            sys,
+            programs[0][0],
+            resolutionCache,
+            useSourceOfProjectReferenceRedirect,
+        );
     }
     return programs;
 }
@@ -289,23 +291,12 @@ function verifyProgramStructureAndResolutionCache(
     program: ts.Program,
     resolutionCache: ts.ResolutionCache,
     useSourceOfProjectReferenceRedirect?: () => boolean,
-    symlinksNotReflected?: readonly string[],
 ) {
     const options = program.getCompilerOptions();
     const compilerHost = ts.createCompilerHostWorker(options, /*setParentNodes*/ undefined, sys);
     compilerHost.trace = ts.noop;
     compilerHost.writeFile = ts.notImplemented;
     compilerHost.useSourceOfProjectReferenceRedirect = useSourceOfProjectReferenceRedirect;
-    const readFile = compilerHost.readFile;
-    compilerHost.readFile = fileName => {
-        const text = readFile.call(compilerHost, fileName);
-        if (!ts.contains(symlinksNotReflected, fileName)) return text;
-        // Handle symlinks that dont reflect the watch change
-        ts.Debug.assert(sys.toPath(sys.realpath(fileName)) !== sys.toPath(fileName));
-        const file = program.getSourceFile(fileName)!;
-        ts.Debug.assert(file.text !== text);
-        return file.text;
-    };
     verifyProgramStructure(
         ts.createProgram({
             rootNames: program.getRootFileNames(),
diff --git a/src/testRunner/unittests/helpers/virtualFileSystemWithWatch.ts b/src/testRunner/unittests/helpers/virtualFileSystemWithWatch.ts
index 3a3790f99c3d1..8dcfd1c453246 100644
--- a/src/testRunner/unittests/helpers/virtualFileSystemWithWatch.ts
+++ b/src/testRunner/unittests/helpers/virtualFileSystemWithWatch.ts
@@ -378,7 +378,7 @@ export class TestServerHost implements server.ServerHost, FormatDiagnosticsHost,
         this.environmentVariables = environmentVariables;
         currentDirectory = currentDirectory || "/";
         this.getCanonicalFileName = createGetCanonicalFileName(!!useCaseSensitiveFileNames);
-        this.watchUtils = createWatchUtils("PolledWatches", "FsWatches", s => this.getCanonicalFileName(s));
+        this.watchUtils = createWatchUtils("PolledWatches", "FsWatches", s => this.getCanonicalFileName(s), this);
         this.toPath = s => toPath(s, currentDirectory, this.getCanonicalFileName);
         this.executingFilePath = this.getHostSpecificPath(executingFilePath || getExecutingFilePathFromLibFile());
         this.currentDirectory = this.getHostSpecificPath(currentDirectory);
@@ -634,7 +634,7 @@ export class TestServerHost implements server.ServerHost, FormatDiagnosticsHost,
         const inodeWatching = this.inodeWatching;
         if (options?.skipInodeCheckOnCreate) this.inodeWatching = false;
         this.invokeFileAndFsWatches(fileOrDirectory.fullPath, FileWatcherEventKind.Created, fileOrDirectory.modifiedTime, options?.useTildeAsSuffixInRenameEventFileName);
-        this.invokeFileAndFsWatches(folder.fullPath, FileWatcherEventKind.Changed, fileOrDirectory.modifiedTime, options?.useTildeAsSuffixInRenameEventFileName);
+        this.invokeFileAndFsWatches(folder.fullPath, FileWatcherEventKind.Changed, folder.modifiedTime, options?.useTildeAsSuffixInRenameEventFileName);
         this.inodeWatching = inodeWatching;
     }
 
@@ -658,14 +658,14 @@ export class TestServerHost implements server.ServerHost, FormatDiagnosticsHost,
 
     deleteFile(filePath: string) {
         const path = this.toFullPath(filePath);
-        const currentEntry = this.fs.get(path) as FsFile;
+        const currentEntry = this.fs.get(path);
         Debug.assert(isFsFile(currentEntry));
         this.removeFileOrFolder(currentEntry);
     }
 
     deleteFolder(folderPath: string, recursive?: boolean) {
         const path = this.toFullPath(folderPath);
-        const currentEntry = this.fs.get(path) as FsFolder;
+        const currentEntry = this.fs.get(path);
         Debug.assert(isFsFolder(currentEntry));
         if (recursive && currentEntry.entries.length) {
             const subEntries = currentEntry.entries.slice();
@@ -688,7 +688,7 @@ export class TestServerHost implements server.ServerHost, FormatDiagnosticsHost,
         );
     }
 
-    private fsWatchWorker(
+    fsWatchWorker(
         fileOrDirectory: string,
         recursive: boolean,
         cb: FsWatchCallback,
@@ -710,7 +710,7 @@ export class TestServerHost implements server.ServerHost, FormatDiagnosticsHost,
     }
 
     invokeFileWatcher(fileFullPath: string, eventKind: FileWatcherEventKind, modifiedTime: Date | undefined) {
-        this.watchUtils.pollingWatches.forEach(fileFullPath, ({ cb }) => cb(fileFullPath, eventKind, modifiedTime));
+        this.watchUtils.pollingWatches.forEach(fileFullPath, ({ cb }, fullPath) => cb(fullPath, eventKind, modifiedTime));
     }
 
     private fsWatchCallback(watches: Watches<TestFsWatcher>, fullPath: string, eventName: "rename" | "change", modifiedTime: Date | undefined, entryFullPath: string | undefined, useTildeSuffix: boolean | undefined) {
@@ -822,6 +822,10 @@ export class TestServerHost implements server.ServerHost, FormatDiagnosticsHost,
         return this.getRealFsEntry(isFsFolder, path, fsEntry);
     }
 
+    private getRealFileOrFolder(s: string): FsFile | FsFolder | undefined {
+        return this.getRealFsEntry((entry): entry is FsFile | FsFolder => !!entry && !isFsSymLink(entry), this.toFullPath(s));
+    }
+
     fileSystemEntryExists(s: string, entryKind: FileSystemEntryKind) {
         return entryKind === FileSystemEntryKind.File ? this.fileExists(s) : this.directoryExists(s);
     }
@@ -832,14 +836,11 @@ export class TestServerHost implements server.ServerHost, FormatDiagnosticsHost,
     }
 
     getModifiedTime(s: string) {
-        const path = this.toFullPath(s);
-        const fsEntry = this.fs.get(path);
-        return (fsEntry && fsEntry.modifiedTime)!; // TODO: GH#18217
+        return this.getRealFileOrFolder(s)?.modifiedTime;
     }
 
     setModifiedTime(s: string, date: Date) {
-        const path = this.toFullPath(s);
-        const fsEntry = this.fs.get(path);
+        const fsEntry = this.getRealFileOrFolder(s);
         if (fsEntry) {
             fsEntry.modifiedTime = date;
             this.invokeFileAndFsWatches(fsEntry.fullPath, FileWatcherEventKind.Changed, fsEntry.modifiedTime);
diff --git a/src/testRunner/unittests/sys/symlinkWatching.ts b/src/testRunner/unittests/sys/symlinkWatching.ts
new file mode 100644
index 0000000000000..6cec445fa3734
--- /dev/null
+++ b/src/testRunner/unittests/sys/symlinkWatching.ts
@@ -0,0 +1,222 @@
+import * as fs from "fs";
+
+import {
+    IO,
+} from "../../_namespaces/Harness";
+import * as ts from "../../_namespaces/ts";
+import {
+    defer,
+} from "../../_namespaces/Utils";
+import {
+    createWatchedSystem,
+} from "../helpers/virtualFileSystemWithWatch";
+describe("unittests:: sys:: symlinkWatching::", () => {
+    function delayedOp(op: () => void) {
+        ts.sys.setTimeout!(op, 100);
+    }
+
+    function modifiedTimeToString(d: Date | undefined) {
+        if (!d) return undefined;
+        return `${d.getHours().toString().padStart(2, "0")}:${d.getMinutes().toString().padStart(2, "0")}:${d.getSeconds().toString().padStart(2, "0")}.${d.getMilliseconds().toString().padStart(3, "0")}`;
+    }
+
+    function verifyWatchFile(
+        scenario: string,
+        sys: ts.System,
+        file: string,
+        link: string,
+        watchOptions: Pick<ts.WatchOptions, "watchFile">,
+        getFileName?: (file: string) => string,
+    ) {
+        it(scenario, async () => {
+            const fileResult = watchFile(file);
+            const linkResult = watchFile(link);
+            delayedOp(() => sys.writeFile(getFileName?.(file) ?? file, "export const x = 100;"));
+
+            // Should invoke on file as well as link
+            await fileResult.deferred[0].promise;
+            await linkResult.deferred[0].promise;
+
+            delayedOp(() => sys.writeFile(getFileName?.(link) ?? link, "export const x = 100;"));
+            // Should invoke on file as well as link
+            await fileResult.deferred[1].promise;
+            await linkResult.deferred[1].promise;
+
+            fileResult.watcher.close();
+            linkResult.watcher.close();
+
+            function watchFile(toWatch: string) {
+                const deferred = [defer(), defer()];
+                let indexForDefer = 0;
+                return {
+                    watcher: sys.watchFile!(
+                        toWatch,
+                        (fileName, eventKind, modifiedTime) => {
+                            assert.equal(fileName, toWatch);
+                            assert.equal(eventKind, ts.FileWatcherEventKind.Changed);
+                            const actual = modifiedTimeToString(modifiedTime);
+                            assert(actual === undefined || actual === modifiedTimeToString(sys.getModifiedTime!(file)));
+                            deferred[indexForDefer++].resolve();
+                        },
+                        10,
+                        watchOptions,
+                    ),
+                    deferred,
+                };
+            }
+        });
+    }
+
+    function verifyWatchDirectoryUsingFsEvents<System extends ts.System>(
+        sys: System,
+        dir: string,
+        link: string,
+        fsWatch: (dir: string, cb: ts.FsWatchCallback, sys: System) => ts.FileWatcher,
+    ) {
+        it(`watchDirectory using fsEvents sheetal`, async () => {
+            const expectedEvent = ["rename", "change", "rename", "change"];
+            const expectedFileName = ["file1.ts", "file1.ts", "file2.ts", "file2.ts"];
+            const fileResult = watchDirectory(dir);
+            const linkResult = watchDirectory(link);
+            delayedOp(() => sys.writeFile(`${dir}/file1.ts`, "export const x = 100;"));
+
+            // Should invoke on file as well as link, rename and change
+            await fileResult.deferred[0].promise;
+            await linkResult.deferred[0].promise;
+            await fileResult.deferred[1].promise;
+            await linkResult.deferred[1].promise;
+
+            delayedOp(() => sys.writeFile(`${link}/file2.ts`, "export const x = 100;"));
+            // // Should invoke on file as well as link, rename and change
+            await fileResult.deferred[2].promise;
+            await linkResult.deferred[2].promise;
+            await fileResult.deferred[3].promise;
+            await linkResult.deferred[3].promise;
+
+            fileResult.watcher.close();
+            linkResult.watcher.close();
+
+            function watchDirectory(dir: string) {
+                const deferred = [defer(), defer(), defer(), defer()];
+                let indexForDefer = 0;
+                return {
+                    dir,
+                    watcher: fsWatch(
+                        dir,
+                        (event, fileName) => {
+                            assert.equal(event, expectedEvent[indexForDefer]);
+                            assert(!fileName || fileName === expectedFileName[indexForDefer]);
+                            deferred[indexForDefer++].resolve();
+                        },
+                        sys,
+                    ),
+                    deferred,
+                };
+            }
+        });
+    }
+
+    function getFileName(): (dir: string) => string {
+        return dir => `${dir}/${ts.getBaseFileName(dir)}.ts`;
+    }
+
+    describe("with ts.sys::", () => {
+        const root = ts.normalizePath(IO.joinPath(IO.getWorkspaceRoot(), "tests/baselines/symlinks"));
+        before(() => {
+            cleanup();
+            ts.sys.writeFile(`${root}/polling/file.ts`, "export const x = 10;");
+            withSwallowException(() => fs.symlinkSync(`${root}/polling`, `${root}/linkedpolling`, "junction"));
+            ts.sys.writeFile(`${root}/fsevents/file.ts`, "export const x = 10;");
+            withSwallowException(() => fs.symlinkSync(`${root}/fsevents`, `${root}/linkedfsevents`, "junction"));
+            ts.sys.writeFile(`${root}/dirpolling/file.ts`, "export const x = 10;");
+            withSwallowException(() => fs.symlinkSync(`${root}/dirpolling`, `${root}/linkeddirpolling`, "junction"));
+            ts.sys.writeFile(`${root}/dirfsevents/file.ts`, "export const x = 10;");
+            withSwallowException(() => fs.symlinkSync(`${root}/dirfsevents`, `${root}/linkeddirfsevents`, "junction"));
+        });
+        after(() => {
+            cleanup();
+        });
+
+        function cleanup() {
+            withSwallowException(() => fs.rmSync(root, { recursive: true, force: true }));
+        }
+
+        function withSwallowException(op: () => void) {
+            try {
+                op();
+            }
+            catch { /* swallow */ }
+        }
+
+        verifyWatchFile(
+            "watchFile using polling",
+            ts.sys,
+            `${root}/polling/file.ts`,
+            `${root}/linkedpolling/file.ts`,
+            { watchFile: ts.WatchFileKind.PriorityPollingInterval },
+        );
+        verifyWatchFile(
+            "watchFile using fsEvents",
+            ts.sys,
+            `${root}/fsevents/file.ts`,
+            `${root}/linkedfsevents/file.ts`,
+            { watchFile: ts.WatchFileKind.UseFsEvents },
+        );
+
+        verifyWatchFile(
+            "watchDirectory using polling",
+            ts.sys,
+            `${root}/dirpolling`,
+            `${root}/linkeddirpolling`,
+            { watchFile: ts.WatchFileKind.PriorityPollingInterval },
+            getFileName(),
+        );
+
+        verifyWatchDirectoryUsingFsEvents(
+            ts.sys,
+            `${root}/dirfsevents`,
+            `${root}/linkeddirfsevents`,
+            (dir, cb) => fs.watch(dir, { persistent: true }, cb),
+        );
+    });
+
+    describe("with virtualFileSystem::", () => {
+        const root = ts.normalizePath("/tests/baselines/symlinks");
+        function getSys() {
+            return createWatchedSystem({
+                [`${root}/folder/file.ts`]: "export const x = 10;",
+                [`${root}/linked`]: { symLink: `${root}/folder` },
+            });
+        }
+        verifyWatchFile(
+            "watchFile using polling",
+            getSys(),
+            `${root}/folder/file.ts`,
+            `${root}/linked/file.ts`,
+            { watchFile: ts.WatchFileKind.PriorityPollingInterval },
+        );
+        verifyWatchFile(
+            "watchFile using fsEvents",
+            getSys(),
+            `${root}/folder/file.ts`,
+            `${root}/linked/file.ts`,
+            { watchFile: ts.WatchFileKind.UseFsEvents },
+        );
+
+        verifyWatchFile(
+            "watchDirectory using polling",
+            getSys(),
+            `${root}/folder`,
+            `${root}/linked`,
+            { watchFile: ts.WatchFileKind.PriorityPollingInterval },
+            getFileName(),
+        );
+
+        verifyWatchDirectoryUsingFsEvents(
+            getSys(),
+            `${root}/folder`,
+            `${root}/linked`,
+            (dir, cb, sys) => sys.fsWatchWorker(dir, /*recursive*/ false, cb),
+        );
+    });
+});
diff --git a/src/testRunner/unittests/tscWatch/forceConsistentCasingInFileNames.ts b/src/testRunner/unittests/tscWatch/forceConsistentCasingInFileNames.ts
index 1d1e1b652fe9c..c78a4ab1b6a75 100644
--- a/src/testRunner/unittests/tscWatch/forceConsistentCasingInFileNames.ts
+++ b/src/testRunner/unittests/tscWatch/forceConsistentCasingInFileNames.ts
@@ -188,7 +188,7 @@ a;b;
         verifyTscWatch({
             scenario: "forceConsistentCasingInFileNames",
             subScenario,
-            commandLineArgs: ["--w", "--p", ".", "--explainFiles"],
+            commandLineArgs: ["--w", "--p", ".", "--explainFiles", "--extendedDiagnostics"],
             sys: () => {
                 const moduleA: File = {
                     path: diskPath,
@@ -226,7 +226,6 @@ a;b;
                         `,
                         ),
                     timeouts: sys => sys.runQueuedTimeoutCallbacks(),
-                    symlinksNotReflected: [`/user/username/projects/myproject/link.ts`],
                 },
             ],
         });
@@ -236,13 +235,13 @@ a;b;
     verifyFileSymlink("when file symlink target matches disk but import does not", `/user/username/projects/myproject/XY.ts`, `/user/username/projects/myproject/Xy.ts`, `./XY`);
     verifyFileSymlink("when import matches disk but file symlink target does not", `/user/username/projects/myproject/XY.ts`, `/user/username/projects/myproject/XY.ts`, `./Xy`);
     verifyFileSymlink("when import and file symlink target agree but do not match disk", `/user/username/projects/myproject/XY.ts`, `/user/username/projects/myproject/Xy.ts`, `./Xy`);
-    verifyFileSymlink("when import, file symlink target, and disk are all different", `/user/username/projects/myproject/XY.ts`, `/user/username/projects/myproject/Xy.ts`, `./yX`);
+    verifyFileSymlink("when import, file symlink target, and disk are all different", `/user/username/projects/myproject/XY.ts`, `/user/username/projects/myproject/Xy.ts`, `./xY`);
 
     function verifyDirSymlink(subScenario: string, diskPath: string, targetPath: string, importedPath: string) {
         verifyTscWatch({
             scenario: "forceConsistentCasingInFileNames",
             subScenario,
-            commandLineArgs: ["--w", "--p", ".", "--explainFiles"],
+            commandLineArgs: ["--w", "--p", ".", "--explainFiles", "--extendedDiagnostics"],
             sys: () => {
                 const moduleA: File = {
                     path: `${diskPath}/a.ts`,
@@ -281,7 +280,6 @@ a;b;
                         `,
                         ),
                     timeouts: sys => sys.runQueuedTimeoutCallbacks(),
-                    symlinksNotReflected: [`/user/username/projects/myproject/link/a.ts`],
                 },
             ],
         });
@@ -291,7 +289,7 @@ a;b;
     verifyDirSymlink("when directory symlink target matches disk but import does not", `/user/username/projects/myproject/XY`, `/user/username/projects/myproject/Xy`, `./XY`);
     verifyDirSymlink("when import matches disk but directory symlink target does not", `/user/username/projects/myproject/XY`, `/user/username/projects/myproject/XY`, `./Xy`);
     verifyDirSymlink("when import and directory symlink target agree but do not match disk", `/user/username/projects/myproject/XY`, `/user/username/projects/myproject/Xy`, `./Xy`);
-    verifyDirSymlink("when import, directory symlink target, and disk are all different", `/user/username/projects/myproject/XY`, `/user/username/projects/myproject/Xy`, `./yX`);
+    verifyDirSymlink("when import, directory symlink target, and disk are all different", `/user/username/projects/myproject/XY`, `/user/username/projects/myproject/Xy`, `./xY`);
 
     verifyTscWatch({
         scenario: "forceConsistentCasingInFileNames",
diff --git a/src/testRunner/unittests/tsserver/events/watchEvents.ts b/src/testRunner/unittests/tsserver/events/watchEvents.ts
index 0a6028dcda33d..4c16dd91fde86 100644
--- a/src/testRunner/unittests/tsserver/events/watchEvents.ts
+++ b/src/testRunner/unittests/tsserver/events/watchEvents.ts
@@ -42,6 +42,7 @@ describe("unittests:: tsserver:: events:: watchEvents", () => {
                 "Custom WatchedFiles",
                 "Custom WatchedDirectories",
                 host.getCanonicalFileName,
+                host,
             ),
             watchFile,
             watchDirectory,
@@ -115,7 +116,7 @@ describe("unittests:: tsserver:: events:: watchEvents", () => {
         session.logger.log("Custom watch");
         (session.logger.host as TestServerHostWithCustomWatch).factoryData.watchUtils.pollingWatches.forEach(
             path,
-            data =>
+            (data, path) =>
                 session.executeCommandSeq<ts.server.protocol.WatchChangeRequest>({
                     command: ts.server.protocol.CommandTypes.WatchChange,
                     arguments: { id: data.id, path, eventType: "update" },
diff --git a/src/testRunner/unittests/tsserver/forceConsistentCasingInFileNames.ts b/src/testRunner/unittests/tsserver/forceConsistentCasingInFileNames.ts
index 7e264e856731f..bb14ea25d7c0d 100644
--- a/src/testRunner/unittests/tsserver/forceConsistentCasingInFileNames.ts
+++ b/src/testRunner/unittests/tsserver/forceConsistentCasingInFileNames.ts
@@ -1,4 +1,7 @@
 import * as ts from "../../_namespaces/ts";
+import {
+    dedent,
+} from "../../_namespaces/Utils";
 import {
     jsonToReadableText,
 } from "../helpers";
@@ -14,6 +17,7 @@ import {
     createServerHost,
     File,
     libFile,
+    SymLink,
 } from "../helpers/virtualFileSystemWithWatch";
 
 describe("unittests:: tsserver:: forceConsistentCasingInFileNames", () => {
@@ -150,4 +154,182 @@ describe("unittests:: tsserver:: forceConsistentCasingInFileNames", () => {
         verifyGetErrRequest({ session, files: [anotherFile] });
         baselineTsserverLogs("forceConsistentCasingInFileNames", "when changing module name with different casing", session);
     });
+
+    describe("with symlinks", () => {
+        function verifySymlink(
+            subScenario: string,
+            linkPath: string,
+            getFiles: () => { moduleA: File; symlinkA: SymLink; moduleB: File; tsconfig: File; },
+        ) {
+            it(subScenario, () => {
+                const { moduleA, symlinkA, moduleB, tsconfig } = getFiles();
+                const host = createServerHost([moduleA, symlinkA, moduleB, libFile, tsconfig], {
+                    currentDirectory: "/user/username/projects/myproject",
+                });
+                const session = new TestSession(host);
+                openFilesForSession([moduleB], session);
+                verifyGetErrRequest({
+                    session,
+                    files: [moduleB],
+                });
+                host.prependFile(moduleA.path, `// some comment\n`);
+                verifyGetErrRequest({
+                    session,
+                    files: [moduleB],
+                    existingTimeouts: true,
+                });
+                baselineTsserverLogs("forceConsistentCasingInFileNames", subScenario, session);
+            });
+
+            it(`${subScenario} with target open`, () => {
+                const { moduleA, symlinkA, moduleB, tsconfig } = getFiles();
+                const host = createServerHost([moduleA, symlinkA, moduleB, libFile, tsconfig], {
+                    currentDirectory: "/user/username/projects/myproject",
+                });
+                const session = new TestSession(host);
+                openFilesForSession([moduleB, moduleA], session);
+                verifyGetErrRequest({
+                    session,
+                    files: [moduleB],
+                });
+                session.executeCommandSeq<ts.server.protocol.ChangeRequest>({
+                    command: ts.server.protocol.CommandTypes.Change,
+                    arguments: {
+                        file: moduleA.path,
+                        line: 1,
+                        offset: 1,
+                        endLine: 1,
+                        endOffset: 1,
+                        insertString: `// some comment\n`,
+                    },
+                });
+                verifyGetErrRequest({
+                    session,
+                    files: [moduleB],
+                });
+                baselineTsserverLogs("forceConsistentCasingInFileNames", `${subScenario} with target open`, session);
+            });
+
+            it(`${subScenario} with link open`, () => {
+                const { moduleA, symlinkA, moduleB, tsconfig } = getFiles();
+                const host = createServerHost([moduleA, symlinkA, moduleB, libFile, tsconfig], {
+                    currentDirectory: "/user/username/projects/myproject",
+                });
+                const session = new TestSession(host);
+                openFilesForSession([moduleB, linkPath], session);
+                verifyGetErrRequest({
+                    session,
+                    files: [moduleB],
+                });
+                host.prependFile(moduleA.path, `// some comment\n`);
+                verifyGetErrRequest({
+                    session,
+                    files: [moduleB],
+                    existingTimeouts: true,
+                });
+                baselineTsserverLogs("forceConsistentCasingInFileNames", `${subScenario} with link open`, session);
+            });
+
+            it(`${subScenario} with target and link open`, () => {
+                const { moduleA, symlinkA, moduleB, tsconfig } = getFiles();
+                const host = createServerHost([moduleA, symlinkA, moduleB, libFile, tsconfig], {
+                    currentDirectory: "/user/username/projects/myproject",
+                });
+                const session = new TestSession(host);
+                openFilesForSession([moduleB, moduleA, linkPath], session);
+                verifyGetErrRequest({
+                    session,
+                    files: [moduleB],
+                });
+                session.executeCommandSeq<ts.server.protocol.ChangeRequest>({
+                    command: ts.server.protocol.CommandTypes.Change,
+                    arguments: {
+                        file: moduleA.path,
+                        line: 1,
+                        offset: 1,
+                        endLine: 1,
+                        endOffset: 1,
+                        insertString: `// some comment\n`,
+                    },
+                });
+                verifyGetErrRequest({
+                    session,
+                    files: [moduleB],
+                });
+                baselineTsserverLogs("forceConsistentCasingInFileNames", `${subScenario} with target and link open`, session);
+            });
+        }
+        function verifyFileSymlink(subScenario: string, diskPath: string, targetPath: string, importedPath: string) {
+            verifySymlink(subScenario, `/user/username/projects/myproject/link.ts`, () => {
+                const moduleA: File = {
+                    path: diskPath,
+                    content: dedent`
+                        export const a = 1;
+                        export const b = 2;
+                    `,
+                };
+                const symlinkA: SymLink = {
+                    path: `/user/username/projects/myproject/link.ts`,
+                    symLink: targetPath,
+                };
+                const moduleB: File = {
+                    path: `/user/username/projects/myproject/b.ts`,
+                    content: dedent`
+                        import { a } from "${importedPath}";
+                        import { b } from "./link";
+    
+                        a;b;
+                    `,
+                };
+                const tsconfig: File = {
+                    path: `/user/username/projects/myproject/tsconfig.json`,
+                    content: jsonToReadableText({ compilerOptions: { forceConsistentCasingInFileNames: true } }),
+                };
+                return { moduleA, symlinkA, moduleB, tsconfig };
+            });
+        }
+
+        verifyFileSymlink("when both file symlink target and import match disk", `/user/username/projects/myproject/XY.ts`, `/user/username/projects/myproject/XY.ts`, `./XY`);
+        verifyFileSymlink("when file symlink target matches disk but import does not", `/user/username/projects/myproject/XY.ts`, `/user/username/projects/myproject/Xy.ts`, `./XY`);
+        verifyFileSymlink("when import matches disk but file symlink target does not", `/user/username/projects/myproject/XY.ts`, `/user/username/projects/myproject/XY.ts`, `./Xy`);
+        verifyFileSymlink("when import and file symlink target agree but do not match disk", `/user/username/projects/myproject/XY.ts`, `/user/username/projects/myproject/Xy.ts`, `./Xy`);
+        verifyFileSymlink("when import, file symlink target, and disk are all different", `/user/username/projects/myproject/XY.ts`, `/user/username/projects/myproject/Xy.ts`, `./xY`);
+
+        function verifyDirSymlink(subScenario: string, diskPath: string, targetPath: string, importedPath: string) {
+            verifySymlink(subScenario, `/user/username/projects/myproject/link/a.ts`, () => {
+                const moduleA: File = {
+                    path: `${diskPath}/a.ts`,
+                    content: dedent`
+                        export const a = 1;
+                        export const b = 2;
+                    `,
+                };
+                const symlinkA: SymLink = {
+                    path: `/user/username/projects/myproject/link`,
+                    symLink: targetPath,
+                };
+                const moduleB: File = {
+                    path: `/user/username/projects/myproject/b.ts`,
+                    content: dedent`
+                        import { a } from "${importedPath}/a";
+                        import { b } from "./link/a";
+    
+                        a;b;
+                    `,
+                };
+                const tsconfig: File = {
+                    path: `/user/username/projects/myproject/tsconfig.json`,
+                    // Use outFile because otherwise the real and linked files will have the same output path
+                    content: jsonToReadableText({ compilerOptions: { forceConsistentCasingInFileNames: true, outFile: "out.js", module: "system" } }),
+                };
+                return { moduleA, symlinkA, moduleB, tsconfig };
+            });
+        }
+
+        verifyDirSymlink("when both directory symlink target and import match disk", `/user/username/projects/myproject/XY`, `/user/username/projects/myproject/XY`, `./XY`);
+        verifyDirSymlink("when directory symlink target matches disk but import does not", `/user/username/projects/myproject/XY`, `/user/username/projects/myproject/Xy`, `./XY`);
+        verifyDirSymlink("when import matches disk but directory symlink target does not", `/user/username/projects/myproject/XY`, `/user/username/projects/myproject/XY`, `./Xy`);
+        verifyDirSymlink("when import and directory symlink target agree but do not match disk", `/user/username/projects/myproject/XY`, `/user/username/projects/myproject/Xy`, `./Xy`);
+        verifyDirSymlink("when import, directory symlink target, and disk are all different", `/user/username/projects/myproject/XY`, `/user/username/projects/myproject/Xy`, `./xY`);
+    });
 });
diff --git a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk.js b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk.js
index 492906d765662..f8396f55964e3 100644
--- a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk.js
+++ b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk.js
@@ -38,11 +38,24 @@ interface Array<T> { length: number; [n: number]: T; }
 }
 
 
-/a/lib/tsc.js --w --p . --explainFiles
+/a/lib/tsc.js --w --p . --explainFiles --extendedDiagnostics
 Output::
->> Screen clear
 [12:00:27 AM] Starting compilation in watch mode...
 
+Current directory: /user/username/projects/myproject CaseSensitiveFileNames: false
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Config file
+Synchronizing program
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/b.ts","/user/username/projects/myproject/XY/a.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"outFile":"/user/username/projects/myproject/out.js","module":4,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/b.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 250 undefined Source file
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
 XY/a.ts
@@ -54,6 +67,8 @@ b.ts
   Matched by default include pattern '**/*'
 [12:00:30 AM] Found 0 errors. Watching for file changes.
 
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
 
 
 //// [/user/username/projects/myproject/out.js]
@@ -136,6 +151,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Not
@@ -162,17 +178,29 @@ export const b = 2;
 
 
 
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 250 undefined Source file
+FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+
+
 Timeout callback:: count: 1
-1: timerToUpdateProgram *new*
+2: timerToUpdateProgram *new*
 
 Before running Timeout callback:: count: 1
-1: timerToUpdateProgram
+2: timerToUpdateProgram
 
 After running Timeout callback:: count: 0
 Output::
->> Screen clear
+Synchronizing program
 [12:00:33 AM] File change detected. Starting incremental compilation...
 
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/b.ts","/user/username/projects/myproject/XY/a.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"outFile":"/user/username/projects/myproject/out.js","module":4,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
 XY/a.ts
@@ -200,13 +228,14 @@ System.register("XY/a", [], function (exports_1, context_1) {
         }
     };
 });
+// some comment
 System.register("link/a", [], function (exports_2, context_2) {
     "use strict";
     var a, b;
     var __moduleName = context_2 && context_2.id;
     return {
         setters: [],
-        execute: function () {
+        execute: function () {// some comment
             exports_2("a", a = 1);
             exports_2("b", b = 2);
         }
@@ -246,6 +275,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Completely
diff --git a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk.js b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk.js
index c5b8e96b521a1..794a11d1dfb22 100644
--- a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk.js
+++ b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk.js
@@ -36,11 +36,24 @@ interface Array<T> { length: number; [n: number]: T; }
 }
 
 
-/a/lib/tsc.js --w --p . --explainFiles
+/a/lib/tsc.js --w --p . --explainFiles --extendedDiagnostics
 Output::
->> Screen clear
 [12:00:25 AM] Starting compilation in watch mode...
 
+Current directory: /user/username/projects/myproject CaseSensitiveFileNames: false
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Config file
+Synchronizing program
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/XY.ts","/user/username/projects/myproject/b.ts","/user/username/projects/myproject/link.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/b.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 250 undefined Source file
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
 XY.ts
@@ -53,6 +66,8 @@ b.ts
   Matched by default include pattern '**/*'
 [12:00:32 AM] Found 0 errors. Watching for file changes.
 
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
 
 
 //// [/user/username/projects/myproject/XY.js]
@@ -113,6 +128,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Not
@@ -147,17 +163,29 @@ export const b = 2;
 
 
 
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+
+
 Timeout callback:: count: 1
-1: timerToUpdateProgram *new*
+2: timerToUpdateProgram *new*
 
 Before running Timeout callback:: count: 1
-1: timerToUpdateProgram
+2: timerToUpdateProgram
 
 After running Timeout callback:: count: 0
 Output::
->> Screen clear
+Synchronizing program
 [12:00:35 AM] File change detected. Starting incremental compilation...
 
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/XY.ts","/user/username/projects/myproject/b.ts","/user/username/projects/myproject/link.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
 XY.ts
@@ -168,7 +196,7 @@ link.ts
   Matched by default include pattern '**/*'
 b.ts
   Matched by default include pattern '**/*'
-[12:00:42 AM] Found 0 errors. Watching for file changes.
+[12:00:45 AM] Found 0 errors. Watching for file changes.
 
 
 
@@ -181,6 +209,15 @@ exports.a = 1;
 exports.b = 2;
 
 
+//// [/user/username/projects/myproject/link.js]
+"use strict";
+// some comment
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.b = exports.a = void 0;
+exports.a = 1;
+exports.b = 2;
+
+
 //// [/user/username/projects/myproject/b.js] file written with same contents
 
 
@@ -194,6 +231,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Completely
@@ -205,10 +243,12 @@ Program files::
 
 Semantic diagnostics in builder refreshed for::
 /user/username/projects/myproject/XY.ts
+/user/username/projects/myproject/link.ts
 /user/username/projects/myproject/b.ts
 
 Shape signatures in builder refreshed for::
 /user/username/projects/myproject/xy.ts (computed .d.ts)
 /user/username/projects/myproject/b.ts (computed .d.ts)
+/user/username/projects/myproject/link.ts (computed .d.ts)
 
 exitCode:: ExitStatus.undefined
diff --git a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not.js b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not.js
index 6fbd761335476..04134386ea20f 100644
--- a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not.js
+++ b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not.js
@@ -38,11 +38,24 @@ interface Array<T> { length: number; [n: number]: T; }
 }
 
 
-/a/lib/tsc.js --w --p . --explainFiles
+/a/lib/tsc.js --w --p . --explainFiles --extendedDiagnostics
 Output::
->> Screen clear
 [12:00:27 AM] Starting compilation in watch mode...
 
+Current directory: /user/username/projects/myproject CaseSensitiveFileNames: false
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Config file
+Synchronizing program
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/b.ts","/user/username/projects/myproject/XY/a.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"outFile":"/user/username/projects/myproject/out.js","module":4,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/b.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 250 undefined Source file
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
 XY/a.ts
@@ -54,6 +67,8 @@ b.ts
   Matched by default include pattern '**/*'
 [12:00:30 AM] Found 0 errors. Watching for file changes.
 
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
 
 
 //// [/user/username/projects/myproject/out.js]
@@ -136,6 +151,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Not
@@ -162,17 +178,29 @@ export const b = 2;
 
 
 
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 250 undefined Source file
+FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+
+
 Timeout callback:: count: 1
-1: timerToUpdateProgram *new*
+2: timerToUpdateProgram *new*
 
 Before running Timeout callback:: count: 1
-1: timerToUpdateProgram
+2: timerToUpdateProgram
 
 After running Timeout callback:: count: 0
 Output::
->> Screen clear
+Synchronizing program
 [12:00:33 AM] File change detected. Starting incremental compilation...
 
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/b.ts","/user/username/projects/myproject/XY/a.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"outFile":"/user/username/projects/myproject/out.js","module":4,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
 XY/a.ts
@@ -200,13 +228,14 @@ System.register("XY/a", [], function (exports_1, context_1) {
         }
     };
 });
+// some comment
 System.register("link/a", [], function (exports_2, context_2) {
     "use strict";
     var a, b;
     var __moduleName = context_2 && context_2.id;
     return {
         setters: [],
-        execute: function () {
+        execute: function () {// some comment
             exports_2("a", a = 1);
             exports_2("b", b = 2);
         }
@@ -246,6 +275,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Completely
diff --git a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not.js b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not.js
index 0f3c728285294..eea6eaab9df55 100644
--- a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not.js
+++ b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not.js
@@ -36,11 +36,24 @@ interface Array<T> { length: number; [n: number]: T; }
 }
 
 
-/a/lib/tsc.js --w --p . --explainFiles
+/a/lib/tsc.js --w --p . --explainFiles --extendedDiagnostics
 Output::
->> Screen clear
 [12:00:25 AM] Starting compilation in watch mode...
 
+Current directory: /user/username/projects/myproject CaseSensitiveFileNames: false
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Config file
+Synchronizing program
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/XY.ts","/user/username/projects/myproject/b.ts","/user/username/projects/myproject/link.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/b.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 250 undefined Source file
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
 XY.ts
@@ -53,6 +66,8 @@ b.ts
   Matched by default include pattern '**/*'
 [12:00:32 AM] Found 0 errors. Watching for file changes.
 
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
 
 
 //// [/user/username/projects/myproject/XY.js]
@@ -113,6 +128,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Not
@@ -147,17 +163,29 @@ export const b = 2;
 
 
 
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+
+
 Timeout callback:: count: 1
-1: timerToUpdateProgram *new*
+2: timerToUpdateProgram *new*
 
 Before running Timeout callback:: count: 1
-1: timerToUpdateProgram
+2: timerToUpdateProgram
 
 After running Timeout callback:: count: 0
 Output::
->> Screen clear
+Synchronizing program
 [12:00:35 AM] File change detected. Starting incremental compilation...
 
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/XY.ts","/user/username/projects/myproject/b.ts","/user/username/projects/myproject/link.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
 XY.ts
@@ -168,7 +196,7 @@ link.ts
   Matched by default include pattern '**/*'
 b.ts
   Matched by default include pattern '**/*'
-[12:00:42 AM] Found 0 errors. Watching for file changes.
+[12:00:45 AM] Found 0 errors. Watching for file changes.
 
 
 
@@ -181,6 +209,15 @@ exports.a = 1;
 exports.b = 2;
 
 
+//// [/user/username/projects/myproject/link.js]
+"use strict";
+// some comment
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.b = exports.a = void 0;
+exports.a = 1;
+exports.b = 2;
+
+
 //// [/user/username/projects/myproject/b.js] file written with same contents
 
 
@@ -194,6 +231,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Completely
@@ -205,10 +243,12 @@ Program files::
 
 Semantic diagnostics in builder refreshed for::
 /user/username/projects/myproject/XY.ts
+/user/username/projects/myproject/link.ts
 /user/username/projects/myproject/b.ts
 
 Shape signatures in builder refreshed for::
 /user/username/projects/myproject/xy.ts (computed .d.ts)
 /user/username/projects/myproject/b.ts (computed .d.ts)
+/user/username/projects/myproject/link.ts (computed .d.ts)
 
 exitCode:: ExitStatus.undefined
diff --git a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different.js b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different.js
index 9e9a72d01e597..bb799030d2a26 100644
--- a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different.js
+++ b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different.js
@@ -9,7 +9,7 @@ export const b = 2;
 //// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
 //// [/user/username/projects/myproject/b.ts]
 
-import { a } from "./yX/a";
+import { a } from "./xY/a";
 import { b } from "./link/a";
 
 a;b;
@@ -38,30 +38,49 @@ interface Array<T> { length: number; [n: number]: T; }
 }
 
 
-/a/lib/tsc.js --w --p . --explainFiles
+/a/lib/tsc.js --w --p . --explainFiles --extendedDiagnostics
 Output::
->> Screen clear
 [12:00:27 AM] Starting compilation in watch mode...
 
-b.ts:2:19 - error TS2792: Cannot find module './yX/a'. Did you mean to set the 'moduleResolution' option to 'nodenext', or to add aliases to the 'paths' option?
+Current directory: /user/username/projects/myproject CaseSensitiveFileNames: false
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Config file
+Synchronizing program
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/b.ts","/user/username/projects/myproject/XY/a.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"outFile":"/user/username/projects/myproject/out.js","module":4,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/b.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/xY/a.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 250 undefined Source file
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+b.ts:2:19 - error TS1261: Already included file name '/user/username/projects/myproject/xY/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.
+  The file is in the program because:
+    Imported via "./xY/a" from file '/user/username/projects/myproject/b.ts'
+    Matched by default include pattern '**/*'
 
-2 import { a } from "./yX/a";
+2 import { a } from "./xY/a";
                     ~~~~~~~~
 
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
+xY/a.ts
+  Imported via "./xY/a" from file 'b.ts'
+  Matched by default include pattern '**/*'
 link/a.ts
   Imported via "./link/a" from file 'b.ts'
 b.ts
   Matched by default include pattern '**/*'
-XY/a.ts
-  Matched by default include pattern '**/*'
 [12:00:30 AM] Found 1 error. Watching for file changes.
 
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
 
 
 //// [/user/username/projects/myproject/out.js]
-System.register("link/a", [], function (exports_1, context_1) {
+System.register("xY/a", [], function (exports_1, context_1) {
     "use strict";
     var a, b;
     var __moduleName = context_1 && context_1.id;
@@ -73,10 +92,22 @@ System.register("link/a", [], function (exports_1, context_1) {
         }
     };
 });
-System.register("b", ["./yX/a", "link/a"], function (exports_2, context_2) {
+System.register("link/a", [], function (exports_2, context_2) {
     "use strict";
-    var a_1, a_2;
+    var a, b;
     var __moduleName = context_2 && context_2.id;
+    return {
+        setters: [],
+        execute: function () {
+            exports_2("a", a = 1);
+            exports_2("b", b = 2);
+        }
+    };
+});
+System.register("b", ["xY/a", "link/a"], function (exports_3, context_3) {
+    "use strict";
+    var a_1, a_2;
+    var __moduleName = context_3 && context_3.id;
     return {
         setters: [
             function (a_1_1) {
@@ -92,40 +123,26 @@ System.register("b", ["./yX/a", "link/a"], function (exports_2, context_2) {
         }
     };
 });
-System.register("XY/a", [], function (exports_3, context_3) {
-    "use strict";
-    var a, b;
-    var __moduleName = context_3 && context_3.id;
-    return {
-        setters: [],
-        execute: function () {
-            exports_3("a", a = 1);
-            exports_3("b", b = 2);
-        }
-    };
-});
 
 
 
 PolledWatches::
 /user/username/projects/myproject/node_modules/@types: *new*
   {"pollingInterval":500}
-/user/username/projects/myproject/yX: *new*
-  {"pollingInterval":500}
 /user/username/projects/node_modules/@types: *new*
   {"pollingInterval":500}
 
 FsWatches::
 /a/lib/lib.d.ts: *new*
   {}
-/user/username/projects/myproject/XY/a.ts: *new*
-  {}
 /user/username/projects/myproject/b.ts: *new*
   {}
 /user/username/projects/myproject/link/a.ts: *new*
   {}
 /user/username/projects/myproject/tsconfig.json: *new*
   {}
+/user/username/projects/myproject/xY/a.ts: *new*
+  {}
 
 FsWatchesRecursive::
 /user/username/projects/myproject: *new*
@@ -142,14 +159,15 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Not
 Program files::
 /a/lib/lib.d.ts
+/user/username/projects/myproject/xY/a.ts
 /user/username/projects/myproject/link/a.ts
 /user/username/projects/myproject/b.ts
-/user/username/projects/myproject/XY/a.ts
 
 No cached semantic diagnostics in the builder::
 
@@ -168,51 +186,81 @@ export const b = 2;
 
 
 
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/xY/a.ts 1:: WatchInfo: /user/username/projects/myproject/xY/a.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/xY/a.ts 1:: WatchInfo: /user/username/projects/myproject/xY/a.ts 250 undefined Source file
+FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+
+
 Timeout callback:: count: 1
-1: timerToUpdateProgram *new*
+2: timerToUpdateProgram *new*
 
 Before running Timeout callback:: count: 1
-1: timerToUpdateProgram
+2: timerToUpdateProgram
 
 After running Timeout callback:: count: 0
 Output::
->> Screen clear
+Synchronizing program
 [12:00:33 AM] File change detected. Starting incremental compilation...
 
-b.ts:2:19 - error TS2792: Cannot find module './yX/a'. Did you mean to set the 'moduleResolution' option to 'nodenext', or to add aliases to the 'paths' option?
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/b.ts","/user/username/projects/myproject/XY/a.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"outFile":"/user/username/projects/myproject/out.js","module":4,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+b.ts:2:19 - error TS1261: Already included file name '/user/username/projects/myproject/xY/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.
+  The file is in the program because:
+    Imported via "./xY/a" from file '/user/username/projects/myproject/b.ts'
+    Matched by default include pattern '**/*'
 
-2 import { a } from "./yX/a";
+2 import { a } from "./xY/a";
                     ~~~~~~~~
 
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
+xY/a.ts
+  Imported via "./xY/a" from file 'b.ts'
+  Matched by default include pattern '**/*'
 link/a.ts
   Imported via "./link/a" from file 'b.ts'
 b.ts
   Matched by default include pattern '**/*'
-XY/a.ts
-  Matched by default include pattern '**/*'
 [12:00:37 AM] Found 1 error. Watching for file changes.
 
 
 
 //// [/user/username/projects/myproject/out.js]
-System.register("link/a", [], function (exports_1, context_1) {
+// some comment
+System.register("xY/a", [], function (exports_1, context_1) {
     "use strict";
     var a, b;
     var __moduleName = context_1 && context_1.id;
     return {
         setters: [],
-        execute: function () {
+        execute: function () {// some comment
             exports_1("a", a = 1);
             exports_1("b", b = 2);
         }
     };
 });
-System.register("b", ["./yX/a", "link/a"], function (exports_2, context_2) {
+// some comment
+System.register("link/a", [], function (exports_2, context_2) {
     "use strict";
-    var a_1, a_2;
+    var a, b;
     var __moduleName = context_2 && context_2.id;
+    return {
+        setters: [],
+        execute: function () {// some comment
+            exports_2("a", a = 1);
+            exports_2("b", b = 2);
+        }
+    };
+});
+System.register("b", ["xY/a", "link/a"], function (exports_3, context_3) {
+    "use strict";
+    var a_1, a_2;
+    var __moduleName = context_3 && context_3.id;
     return {
         setters: [
             function (a_1_1) {
@@ -228,19 +276,6 @@ System.register("b", ["./yX/a", "link/a"], function (exports_2, context_2) {
         }
     };
 });
-// some comment
-System.register("XY/a", [], function (exports_3, context_3) {
-    "use strict";
-    var a, b;
-    var __moduleName = context_3 && context_3.id;
-    return {
-        setters: [],
-        execute: function () {// some comment
-            exports_3("a", a = 1);
-            exports_3("b", b = 2);
-        }
-    };
-});
 
 
 
@@ -256,14 +291,15 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Completely
 Program files::
 /a/lib/lib.d.ts
+/user/username/projects/myproject/xY/a.ts
 /user/username/projects/myproject/link/a.ts
 /user/username/projects/myproject/b.ts
-/user/username/projects/myproject/XY/a.ts
 
 No cached semantic diagnostics in the builder::
 
diff --git a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different.js b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different.js
index 94a19d7a0f6db..c995b0a6fded3 100644
--- a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different.js
+++ b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different.js
@@ -9,7 +9,7 @@ export const b = 2;
 //// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
 //// [/user/username/projects/myproject/b.ts]
 
-import { a } from "./yX";
+import { a } from "./xY";
 import { b } from "./link";
 
 a;b;
@@ -36,20 +36,37 @@ interface Array<T> { length: number; [n: number]: T; }
 }
 
 
-/a/lib/tsc.js --w --p . --explainFiles
+/a/lib/tsc.js --w --p . --explainFiles --extendedDiagnostics
 Output::
->> Screen clear
 [12:00:25 AM] Starting compilation in watch mode...
 
-b.ts:2:19 - error TS2307: Cannot find module './yX' or its corresponding type declarations.
+Current directory: /user/username/projects/myproject CaseSensitiveFileNames: false
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Config file
+Synchronizing program
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/XY.ts","/user/username/projects/myproject/b.ts","/user/username/projects/myproject/link.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/b.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 250 undefined Source file
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+b.ts:2:19 - error TS1149: File name '/user/username/projects/myproject/xY.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.
+  The file is in the program because:
+    Matched by default include pattern '**/*'
+    Imported via "./xY" from file '/user/username/projects/myproject/b.ts'
 
-2 import { a } from "./yX";
+2 import { a } from "./xY";
                     ~~~~~~
 
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
 XY.ts
   Matched by default include pattern '**/*'
+  Imported via "./xY" from file 'b.ts'
 link.ts
   Imported via "./link" from file 'b.ts'
   Matched by default include pattern '**/*'
@@ -57,6 +74,8 @@ b.ts
   Matched by default include pattern '**/*'
 [12:00:32 AM] Found 1 error. Watching for file changes.
 
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
 
 
 //// [/user/username/projects/myproject/XY.js]
@@ -78,9 +97,9 @@ exports.b = 2;
 //// [/user/username/projects/myproject/b.js]
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
-var yX_1 = require("./yX");
+var xY_1 = require("./xY");
 var link_1 = require("./link");
-yX_1.a;
+xY_1.a;
 link_1.b;
 
 
@@ -88,16 +107,12 @@ link_1.b;
 PolledWatches::
 /user/username/projects/myproject/node_modules/@types: *new*
   {"pollingInterval":500}
-/user/username/projects/myproject/yX: *new*
-  {"pollingInterval":500}
 /user/username/projects/node_modules/@types: *new*
   {"pollingInterval":500}
 
 FsWatches::
 /a/lib/lib.d.ts: *new*
   {}
-/user/username/projects/myproject: *new*
-  {}
 /user/username/projects/myproject/XY.ts: *new*
   {}
 /user/username/projects/myproject/b.ts: *new*
@@ -121,6 +136,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Not
@@ -155,32 +171,48 @@ export const b = 2;
 
 
 
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+
+
 Timeout callback:: count: 1
-1: timerToUpdateProgram *new*
+2: timerToUpdateProgram *new*
 
 Before running Timeout callback:: count: 1
-1: timerToUpdateProgram
+2: timerToUpdateProgram
 
 After running Timeout callback:: count: 0
 Output::
->> Screen clear
+Synchronizing program
 [12:00:35 AM] File change detected. Starting incremental compilation...
 
-b.ts:2:19 - error TS2307: Cannot find module './yX' or its corresponding type declarations.
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/XY.ts","/user/username/projects/myproject/b.ts","/user/username/projects/myproject/link.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+b.ts:2:19 - error TS1149: File name '/user/username/projects/myproject/xY.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.
+  The file is in the program because:
+    Matched by default include pattern '**/*'
+    Imported via "./xY" from file '/user/username/projects/myproject/b.ts'
 
-2 import { a } from "./yX";
+2 import { a } from "./xY";
                     ~~~~~~
 
 ../../../../a/lib/lib.d.ts
   Default library for target 'es5'
 XY.ts
   Matched by default include pattern '**/*'
+  Imported via "./xY" from file 'b.ts'
 link.ts
   Imported via "./link" from file 'b.ts'
   Matched by default include pattern '**/*'
 b.ts
   Matched by default include pattern '**/*'
-[12:00:39 AM] Found 1 error. Watching for file changes.
+[12:00:45 AM] Found 1 error. Watching for file changes.
 
 
 
@@ -193,6 +225,16 @@ exports.a = 1;
 exports.b = 2;
 
 
+//// [/user/username/projects/myproject/link.js]
+"use strict";
+// some comment
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.b = exports.a = void 0;
+exports.a = 1;
+exports.b = 2;
+
+
+//// [/user/username/projects/myproject/b.js] file written with same contents
 
 
 Program root files: [
@@ -205,6 +247,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Completely
@@ -216,8 +259,12 @@ Program files::
 
 Semantic diagnostics in builder refreshed for::
 /user/username/projects/myproject/XY.ts
+/user/username/projects/myproject/link.ts
+/user/username/projects/myproject/b.ts
 
 Shape signatures in builder refreshed for::
 /user/username/projects/myproject/xy.ts (computed .d.ts)
+/user/username/projects/myproject/b.ts (computed .d.ts)
+/user/username/projects/myproject/link.ts (computed .d.ts)
 
 exitCode:: ExitStatus.undefined
diff --git a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk.js b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk.js
index 8e16059bf38ad..c9131f80011fc 100644
--- a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk.js
+++ b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk.js
@@ -38,11 +38,24 @@ interface Array<T> { length: number; [n: number]: T; }
 }
 
 
-/a/lib/tsc.js --w --p . --explainFiles
+/a/lib/tsc.js --w --p . --explainFiles --extendedDiagnostics
 Output::
->> Screen clear
 [12:00:27 AM] Starting compilation in watch mode...
 
+Current directory: /user/username/projects/myproject CaseSensitiveFileNames: false
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Config file
+Synchronizing program
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/b.ts","/user/username/projects/myproject/XY/a.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"outFile":"/user/username/projects/myproject/out.js","module":4,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/b.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/Xy/a.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 250 undefined Source file
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
 b.ts:2:19 - error TS1261: Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.
   The file is in the program because:
     Imported via "./Xy/a" from file '/user/username/projects/myproject/b.ts'
@@ -62,6 +75,8 @@ b.ts
   Matched by default include pattern '**/*'
 [12:00:30 AM] Found 1 error. Watching for file changes.
 
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
 
 
 //// [/user/username/projects/myproject/out.js]
@@ -144,6 +159,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Not
@@ -170,17 +186,29 @@ export const b = 2;
 
 
 
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/Xy/a.ts 1:: WatchInfo: /user/username/projects/myproject/Xy/a.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/Xy/a.ts 1:: WatchInfo: /user/username/projects/myproject/Xy/a.ts 250 undefined Source file
+FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+
+
 Timeout callback:: count: 1
-1: timerToUpdateProgram *new*
+2: timerToUpdateProgram *new*
 
 Before running Timeout callback:: count: 1
-1: timerToUpdateProgram
+2: timerToUpdateProgram
 
 After running Timeout callback:: count: 0
 Output::
->> Screen clear
+Synchronizing program
 [12:00:33 AM] File change detected. Starting incremental compilation...
 
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/b.ts","/user/username/projects/myproject/XY/a.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"outFile":"/user/username/projects/myproject/out.js","module":4,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
 b.ts:2:19 - error TS1261: Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.
   The file is in the program because:
     Imported via "./Xy/a" from file '/user/username/projects/myproject/b.ts'
@@ -216,13 +244,14 @@ System.register("Xy/a", [], function (exports_1, context_1) {
         }
     };
 });
+// some comment
 System.register("link/a", [], function (exports_2, context_2) {
     "use strict";
     var a, b;
     var __moduleName = context_2 && context_2.id;
     return {
         setters: [],
-        execute: function () {
+        execute: function () {// some comment
             exports_2("a", a = 1);
             exports_2("b", b = 2);
         }
@@ -262,6 +291,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Completely
diff --git a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk.js b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk.js
index acbae92d6101d..a1434a2c98f5c 100644
--- a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk.js
+++ b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk.js
@@ -36,11 +36,24 @@ interface Array<T> { length: number; [n: number]: T; }
 }
 
 
-/a/lib/tsc.js --w --p . --explainFiles
+/a/lib/tsc.js --w --p . --explainFiles --extendedDiagnostics
 Output::
->> Screen clear
 [12:00:25 AM] Starting compilation in watch mode...
 
+Current directory: /user/username/projects/myproject CaseSensitiveFileNames: false
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Config file
+Synchronizing program
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/XY.ts","/user/username/projects/myproject/b.ts","/user/username/projects/myproject/link.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/b.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 250 undefined Source file
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
 b.ts:2:19 - error TS1149: File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.
   The file is in the program because:
     Matched by default include pattern '**/*'
@@ -61,6 +74,8 @@ b.ts
   Matched by default include pattern '**/*'
 [12:00:32 AM] Found 1 error. Watching for file changes.
 
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
 
 
 //// [/user/username/projects/myproject/XY.js]
@@ -121,6 +136,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Not
@@ -155,17 +171,29 @@ export const b = 2;
 
 
 
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+
+
 Timeout callback:: count: 1
-1: timerToUpdateProgram *new*
+2: timerToUpdateProgram *new*
 
 Before running Timeout callback:: count: 1
-1: timerToUpdateProgram
+2: timerToUpdateProgram
 
 After running Timeout callback:: count: 0
 Output::
->> Screen clear
+Synchronizing program
 [12:00:35 AM] File change detected. Starting incremental compilation...
 
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/XY.ts","/user/username/projects/myproject/b.ts","/user/username/projects/myproject/link.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
 b.ts:2:19 - error TS1149: File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.
   The file is in the program because:
     Matched by default include pattern '**/*'
@@ -184,7 +212,7 @@ link.ts
   Matched by default include pattern '**/*'
 b.ts
   Matched by default include pattern '**/*'
-[12:00:42 AM] Found 1 error. Watching for file changes.
+[12:00:45 AM] Found 1 error. Watching for file changes.
 
 
 
@@ -197,6 +225,15 @@ exports.a = 1;
 exports.b = 2;
 
 
+//// [/user/username/projects/myproject/link.js]
+"use strict";
+// some comment
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.b = exports.a = void 0;
+exports.a = 1;
+exports.b = 2;
+
+
 //// [/user/username/projects/myproject/b.js] file written with same contents
 
 
@@ -210,6 +247,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Completely
@@ -221,10 +259,12 @@ Program files::
 
 Semantic diagnostics in builder refreshed for::
 /user/username/projects/myproject/XY.ts
+/user/username/projects/myproject/link.ts
 /user/username/projects/myproject/b.ts
 
 Shape signatures in builder refreshed for::
 /user/username/projects/myproject/xy.ts (computed .d.ts)
 /user/username/projects/myproject/b.ts (computed .d.ts)
+/user/username/projects/myproject/link.ts (computed .d.ts)
 
 exitCode:: ExitStatus.undefined
diff --git a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not.js b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not.js
index 7807baa22a334..8cc332379f227 100644
--- a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not.js
+++ b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not.js
@@ -38,11 +38,24 @@ interface Array<T> { length: number; [n: number]: T; }
 }
 
 
-/a/lib/tsc.js --w --p . --explainFiles
+/a/lib/tsc.js --w --p . --explainFiles --extendedDiagnostics
 Output::
->> Screen clear
 [12:00:27 AM] Starting compilation in watch mode...
 
+Current directory: /user/username/projects/myproject CaseSensitiveFileNames: false
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Config file
+Synchronizing program
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/b.ts","/user/username/projects/myproject/XY/a.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"outFile":"/user/username/projects/myproject/out.js","module":4,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/b.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/Xy/a.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 250 undefined Source file
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
 b.ts:2:19 - error TS1261: Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.
   The file is in the program because:
     Imported via "./Xy/a" from file '/user/username/projects/myproject/b.ts'
@@ -62,6 +75,8 @@ b.ts
   Matched by default include pattern '**/*'
 [12:00:30 AM] Found 1 error. Watching for file changes.
 
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
 
 
 //// [/user/username/projects/myproject/out.js]
@@ -144,6 +159,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Not
@@ -170,17 +186,29 @@ export const b = 2;
 
 
 
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/Xy/a.ts 1:: WatchInfo: /user/username/projects/myproject/Xy/a.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/Xy/a.ts 1:: WatchInfo: /user/username/projects/myproject/Xy/a.ts 250 undefined Source file
+FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 250 undefined Source file
+
+
 Timeout callback:: count: 1
-1: timerToUpdateProgram *new*
+2: timerToUpdateProgram *new*
 
 Before running Timeout callback:: count: 1
-1: timerToUpdateProgram
+2: timerToUpdateProgram
 
 After running Timeout callback:: count: 0
 Output::
->> Screen clear
+Synchronizing program
 [12:00:33 AM] File change detected. Starting incremental compilation...
 
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/b.ts","/user/username/projects/myproject/XY/a.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"outFile":"/user/username/projects/myproject/out.js","module":4,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
 b.ts:2:19 - error TS1261: Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.
   The file is in the program because:
     Imported via "./Xy/a" from file '/user/username/projects/myproject/b.ts'
@@ -216,13 +244,14 @@ System.register("Xy/a", [], function (exports_1, context_1) {
         }
     };
 });
+// some comment
 System.register("link/a", [], function (exports_2, context_2) {
     "use strict";
     var a, b;
     var __moduleName = context_2 && context_2.id;
     return {
         setters: [],
-        execute: function () {
+        execute: function () {// some comment
             exports_2("a", a = 1);
             exports_2("b", b = 2);
         }
@@ -262,6 +291,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Completely
diff --git a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not.js b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not.js
index 25f173f6f2868..f4f7e285cdaea 100644
--- a/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not.js
+++ b/tests/baselines/reference/tscWatch/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not.js
@@ -36,11 +36,24 @@ interface Array<T> { length: number; [n: number]: T; }
 }
 
 
-/a/lib/tsc.js --w --p . --explainFiles
+/a/lib/tsc.js --w --p . --explainFiles --extendedDiagnostics
 Output::
->> Screen clear
 [12:00:25 AM] Starting compilation in watch mode...
 
+Current directory: /user/username/projects/myproject CaseSensitiveFileNames: false
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Config file
+Synchronizing program
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/XY.ts","/user/username/projects/myproject/b.ts","/user/username/projects/myproject/link.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/b.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 250 undefined Source file
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Type roots
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Type roots
 b.ts:2:19 - error TS1149: File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.
   The file is in the program because:
     Matched by default include pattern '**/*'
@@ -61,6 +74,8 @@ b.ts
   Matched by default include pattern '**/*'
 [12:00:32 AM] Found 1 error. Watching for file changes.
 
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Wild card directory
 
 
 //// [/user/username/projects/myproject/XY.js]
@@ -121,6 +136,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Not
@@ -155,17 +171,29 @@ export const b = 2;
 
 
 
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 250 undefined Source file
+FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 250 undefined Source file
+
+
 Timeout callback:: count: 1
-1: timerToUpdateProgram *new*
+2: timerToUpdateProgram *new*
 
 Before running Timeout callback:: count: 1
-1: timerToUpdateProgram
+2: timerToUpdateProgram
 
 After running Timeout callback:: count: 0
 Output::
->> Screen clear
+Synchronizing program
 [12:00:35 AM] File change detected. Starting incremental compilation...
 
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/XY.ts","/user/username/projects/myproject/b.ts","/user/username/projects/myproject/link.ts"]
+  options: {"forceConsistentCasingInFileNames":true,"watch":true,"project":"/user/username/projects/myproject","explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
 b.ts:2:19 - error TS1149: File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.
   The file is in the program because:
     Matched by default include pattern '**/*'
@@ -184,7 +212,7 @@ link.ts
   Matched by default include pattern '**/*'
 b.ts
   Matched by default include pattern '**/*'
-[12:00:42 AM] Found 1 error. Watching for file changes.
+[12:00:45 AM] Found 1 error. Watching for file changes.
 
 
 
@@ -197,6 +225,15 @@ exports.a = 1;
 exports.b = 2;
 
 
+//// [/user/username/projects/myproject/link.js]
+"use strict";
+// some comment
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.b = exports.a = void 0;
+exports.a = 1;
+exports.b = 2;
+
+
 //// [/user/username/projects/myproject/b.js] file written with same contents
 
 
@@ -210,6 +247,7 @@ Program options: {
   "watch": true,
   "project": "/user/username/projects/myproject",
   "explainFiles": true,
+  "extendedDiagnostics": true,
   "configFilePath": "/user/username/projects/myproject/tsconfig.json"
 }
 Program structureReused: Completely
@@ -221,10 +259,12 @@ Program files::
 
 Semantic diagnostics in builder refreshed for::
 /user/username/projects/myproject/XY.ts
+/user/username/projects/myproject/link.ts
 /user/username/projects/myproject/b.ts
 
 Shape signatures in builder refreshed for::
 /user/username/projects/myproject/xy.ts (computed .d.ts)
 /user/username/projects/myproject/b.ts (computed .d.ts)
+/user/username/projects/myproject/link.ts (computed .d.ts)
 
 exitCode:: ExitStatus.undefined
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk-with-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk-with-link-open.js
new file mode 100644
index 0000000000000..b6b97b8c15d63
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk-with-link-open.js
@@ -0,0 +1,539 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/XY)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY/a.ts
+	  Imported via "./XY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/link
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/XY/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+2: /user/username/projects/myproject/tsconfig.json *new*
+3: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne *new*
+
+Before running Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne
+
+Invoking Timeout callback:: timeoutId:: 4:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk-with-target-and-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk-with-target-and-link-open.js
new file mode 100644
index 0000000000000..a3b9646c69892
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk-with-target-and-link-open.js
@@ -0,0 +1,592 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/XY)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY/a.ts
+	  Imported via "./XY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/XY
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link/a.ts"
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/link
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 6,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 6
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk-with-target-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk-with-target-open.js
new file mode 100644
index 0000000000000..f8271704ced48
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk-with-target-open.js
@@ -0,0 +1,522 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/XY)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY/a.ts
+	  Imported via "./XY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/XY
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 5
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk.js
new file mode 100644
index 0000000000000..94b768bd8f033
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-directory-symlink-target-and-import-match-disk.js
@@ -0,0 +1,475 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/XY)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY/a.ts
+	  Imported via "./XY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 2
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+4: /user/username/projects/myproject/tsconfig.json *new*
+5: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne *new*
+
+Before running Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne
+
+Invoking Timeout callback:: timeoutId:: 6:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk-with-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk-with-link-open.js
new file mode 100644
index 0000000000000..a857291d5ccdd
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk-with-link-open.js
@@ -0,0 +1,535 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/XY.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./XY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/XY.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+2: /user/username/projects/myproject/tsconfig.json *new*
+3: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne *new*
+
+Before running Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne
+
+Invoking Timeout callback:: timeoutId:: 4:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk-with-target-and-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk-with-target-and-link-open.js
new file mode 100644
index 0000000000000..ad2efb8cb43bd
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk-with-target-and-link-open.js
@@ -0,0 +1,588 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/XY.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./XY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link.ts"
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 6,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 6
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk-with-target-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk-with-target-open.js
new file mode 100644
index 0000000000000..6ff45973110d2
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk-with-target-open.js
@@ -0,0 +1,518 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/XY.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./XY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 5
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk.js
new file mode 100644
index 0000000000000..0a944a30f80fc
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-both-file-symlink-target-and-import-match-disk.js
@@ -0,0 +1,471 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/XY.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./XY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 2
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+4: /user/username/projects/myproject/tsconfig.json *new*
+5: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne *new*
+
+Before running Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne
+
+Invoking Timeout callback:: timeoutId:: 6:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not-with-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not-with-link-open.js
new file mode 100644
index 0000000000000..eb753a38e6ff7
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not-with-link-open.js
@@ -0,0 +1,539 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY/a.ts
+	  Imported via "./XY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/link
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/XY/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+2: /user/username/projects/myproject/tsconfig.json *new*
+3: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne *new*
+
+Before running Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne
+
+Invoking Timeout callback:: timeoutId:: 4:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not-with-target-and-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not-with-target-and-link-open.js
new file mode 100644
index 0000000000000..360db10f90049
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not-with-target-and-link-open.js
@@ -0,0 +1,592 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY/a.ts
+	  Imported via "./XY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/XY
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link/a.ts"
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/link
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 6,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 6
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not-with-target-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not-with-target-open.js
new file mode 100644
index 0000000000000..f2c5e5e28c28c
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not-with-target-open.js
@@ -0,0 +1,522 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY/a.ts
+	  Imported via "./XY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/XY
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 5
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not.js
new file mode 100644
index 0000000000000..695c7d94fe7f3
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-directory-symlink-target-matches-disk-but-import-does-not.js
@@ -0,0 +1,475 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY/a.ts
+	  Imported via "./XY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 2
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+4: /user/username/projects/myproject/tsconfig.json *new*
+5: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne *new*
+
+Before running Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne
+
+Invoking Timeout callback:: timeoutId:: 6:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not-with-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not-with-link-open.js
new file mode 100644
index 0000000000000..57a2d60689c2f
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not-with-link-open.js
@@ -0,0 +1,535 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./XY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/XY.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+2: /user/username/projects/myproject/tsconfig.json *new*
+3: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne *new*
+
+Before running Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne
+
+Invoking Timeout callback:: timeoutId:: 4:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not-with-target-and-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not-with-target-and-link-open.js
new file mode 100644
index 0000000000000..b26b11459c0f9
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not-with-target-and-link-open.js
@@ -0,0 +1,588 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./XY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link.ts"
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 6,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 6
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not-with-target-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not-with-target-open.js
new file mode 100644
index 0000000000000..3a9ee1aaec5af
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not-with-target-open.js
@@ -0,0 +1,518 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./XY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 5
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not.js
new file mode 100644
index 0000000000000..cc185ee7d9208
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-file-symlink-target-matches-disk-but-import-does-not.js
@@ -0,0 +1,471 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./XY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./XY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 2
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+4: /user/username/projects/myproject/tsconfig.json *new*
+5: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne *new*
+
+Before running Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne
+
+Invoking Timeout callback:: timeoutId:: 6:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./XY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different-with-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different-with-link-open.js
new file mode 100644
index 0000000000000..305e0592db09a
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different-with-link-open.js
@@ -0,0 +1,567 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./xY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/xY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	xY/a.ts
+	  Imported via "./xY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/link
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/XY/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/xY/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./xY/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+2: /user/username/projects/myproject/tsconfig.json *new*
+3: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne *new*
+
+Before running Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne
+
+Invoking Timeout callback:: timeoutId:: 4:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/xY/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/xY/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./xY/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different-with-target-and-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different-with-target-and-link-open.js
new file mode 100644
index 0000000000000..da965ea0dc106
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different-with-target-and-link-open.js
@@ -0,0 +1,620 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./xY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/xY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	xY/a.ts
+	  Imported via "./xY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/XY
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link/a.ts"
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/link
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/xY/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./xY/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 6,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/xY/a.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/xY/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./xY/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 6
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different-with-target-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different-with-target-open.js
new file mode 100644
index 0000000000000..49db2d10624ad
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different-with-target-open.js
@@ -0,0 +1,550 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./xY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/xY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	xY/a.ts
+	  Imported via "./xY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/XY
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/xY/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./xY/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/xY/a.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/xY/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./xY/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 5
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different.js
new file mode 100644
index 0000000000000..cb15d241f885b
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-directory-symlink-target,-and-disk-are-all-different.js
@@ -0,0 +1,503 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./xY/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/xY/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	xY/a.ts
+	  Imported via "./xY/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/xY/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./xY/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 2
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+4: /user/username/projects/myproject/tsconfig.json *new*
+5: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne *new*
+
+Before running Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne
+
+Invoking Timeout callback:: timeoutId:: 6:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/xY/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/xY/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./xY/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different-with-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different-with-link-open.js
new file mode 100644
index 0000000000000..1bb0f98a9a554
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different-with-link-open.js
@@ -0,0 +1,563 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./xY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./xY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/XY.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/xY.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./xY\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+2: /user/username/projects/myproject/tsconfig.json *new*
+3: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne *new*
+
+Before running Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne
+
+Invoking Timeout callback:: timeoutId:: 4:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/xY.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./xY\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different-with-target-and-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different-with-target-and-link-open.js
new file mode 100644
index 0000000000000..22fdc6facc07f
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different-with-target-and-link-open.js
@@ -0,0 +1,616 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./xY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./xY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link.ts"
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/xY.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./xY\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 6,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/xY.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./xY\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 6
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different-with-target-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different-with-target-open.js
new file mode 100644
index 0000000000000..46387b5bf2aac
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different-with-target-open.js
@@ -0,0 +1,546 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./xY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./xY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/xY.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./xY\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/xY.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./xY\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 5
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different.js
new file mode 100644
index 0000000000000..467025d3c1268
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import,-file-symlink-target,-and-disk-are-all-different.js
@@ -0,0 +1,499 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./xY";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./xY" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/xY.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./xY\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 2
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+4: /user/username/projects/myproject/tsconfig.json *new*
+5: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne *new*
+
+Before running Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne
+
+Invoking Timeout callback:: timeoutId:: 6:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./xY\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/xY.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./xY\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk-with-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk-with-link-open.js
new file mode 100644
index 0000000000000..f2c0e32f88fcb
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk-with-link-open.js
@@ -0,0 +1,567 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	Xy/a.ts
+	  Imported via "./Xy/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/link
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/XY/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+2: /user/username/projects/myproject/tsconfig.json *new*
+3: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne *new*
+
+Before running Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne
+
+Invoking Timeout callback:: timeoutId:: 4:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk-with-target-and-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk-with-target-and-link-open.js
new file mode 100644
index 0000000000000..361dfc1691e60
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk-with-target-and-link-open.js
@@ -0,0 +1,620 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	Xy/a.ts
+	  Imported via "./Xy/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/XY
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link/a.ts"
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/link
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 6,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 6
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk-with-target-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk-with-target-open.js
new file mode 100644
index 0000000000000..791b90f7b94e9
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk-with-target-open.js
@@ -0,0 +1,550 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	Xy/a.ts
+	  Imported via "./Xy/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/XY
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 5
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk.js
new file mode 100644
index 0000000000000..01d2688a10f3f
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-directory-symlink-target-agree-but-do-not-match-disk.js
@@ -0,0 +1,503 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/Xy)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	Xy/a.ts
+	  Imported via "./Xy/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 2
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+4: /user/username/projects/myproject/tsconfig.json *new*
+5: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne *new*
+
+Before running Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne
+
+Invoking Timeout callback:: timeoutId:: 6:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk-with-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk-with-link-open.js
new file mode 100644
index 0000000000000..b8ad97fb33b41
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk-with-link-open.js
@@ -0,0 +1,563 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./Xy" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/XY.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+2: /user/username/projects/myproject/tsconfig.json *new*
+3: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne *new*
+
+Before running Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne
+
+Invoking Timeout callback:: timeoutId:: 4:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk-with-target-and-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk-with-target-and-link-open.js
new file mode 100644
index 0000000000000..ebbd10f82fe21
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk-with-target-and-link-open.js
@@ -0,0 +1,616 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./Xy" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link.ts"
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 6,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 6
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk-with-target-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk-with-target-open.js
new file mode 100644
index 0000000000000..2a720542d63ad
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk-with-target-open.js
@@ -0,0 +1,546 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./Xy" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 5
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk.js
new file mode 100644
index 0000000000000..f9ed6671dfdb2
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-and-file-symlink-target-agree-but-do-not-match-disk.js
@@ -0,0 +1,499 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/Xy.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./Xy" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 2
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+4: /user/username/projects/myproject/tsconfig.json *new*
+5: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne *new*
+
+Before running Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne
+
+Invoking Timeout callback:: timeoutId:: 6:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not-with-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not-with-link-open.js
new file mode 100644
index 0000000000000..096fb98d0a9ba
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not-with-link-open.js
@@ -0,0 +1,567 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/XY)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	Xy/a.ts
+	  Imported via "./Xy/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/link
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/XY/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+2: /user/username/projects/myproject/tsconfig.json *new*
+3: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne *new*
+
+Before running Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne
+
+Invoking Timeout callback:: timeoutId:: 4:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not-with-target-and-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not-with-target-and-link-open.js
new file mode 100644
index 0000000000000..52b932f608c31
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not-with-target-and-link-open.js
@@ -0,0 +1,620 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/XY)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	Xy/a.ts
+	  Imported via "./Xy/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/XY
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link/a.ts"
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/link
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 6,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 6
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not-with-target-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not-with-target-open.js
new file mode 100644
index 0000000000000..f8530f48bc607
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not-with-target-open.js
@@ -0,0 +1,550 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/XY)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	Xy/a.ts
+	  Imported via "./Xy/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject/XY
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY/a.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY/a.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link/a.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY/a.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY/a.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 5
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not.js
new file mode 100644
index 0000000000000..ed702a9d977fb
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-directory-symlink-target-does-not.js
@@ -0,0 +1,503 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link] symlink(/user/username/projects/myproject/XY)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy/a";
+import { b } from "./link/a";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+    "outFile": "out.js",
+    "module": "system"
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/XY/a.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "outFile": "/user/username/projects/myproject/out.js",
+  "module": 4,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	Xy/a.ts
+	  Imported via "./Xy/a" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	link/a.ts
+	  Imported via "./link/a" from file 'b.ts'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 144,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true,
+            "outFile": "",
+            "module": "system"
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY/a.ts: *new*
+  {}
+/user/username/projects/myproject/link/a.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 2
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY/a.ts 1:: WatchInfo: /user/username/projects/myproject/XY/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link/a.ts 1:: WatchInfo: /user/username/projects/myproject/link/a.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY/a.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+4: /user/username/projects/myproject/tsconfig.json *new*
+5: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne *new*
+
+Before running Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne
+
+Invoking Timeout callback:: timeoutId:: 6:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/Xy/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link/a.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy/a\";\nimport { b } from \"./link/a\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link/a.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 27
+            },
+            "text": "Already included file name '/user/username/projects/myproject/Xy/a.ts' differs from file name '/user/username/projects/myproject/XY/a.ts' only in casing.\n  The file is in the program because:\n    Imported via \"./Xy/a\" from file '/user/username/projects/myproject/b.ts'\n    Matched by default include pattern '**/*'",
+            "code": 1261,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not-with-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not-with-link-open.js
new file mode 100644
index 0000000000000..e3aa0966eccb8
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not-with-link-open.js
@@ -0,0 +1,563 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/XY.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./Xy" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/XY.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+2: /user/username/projects/myproject/tsconfig.json *new*
+3: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne *new*
+
+Before running Timeout callback:: count: 3
+2: /user/username/projects/myproject/tsconfig.json
+3: *ensureProjectForOpenFiles*
+4: checkOne
+
+Invoking Timeout callback:: timeoutId:: 4:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not-with-target-and-link-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not-with-target-and-link-open.js
new file mode 100644
index 0000000000000..f96d002cab477
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not-with-target-and-link-open.js
@@ -0,0 +1,616 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/XY.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./Xy" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/link.ts"
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/link.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/link.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/link.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 4
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts (Open)
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 6,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 6
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not-with-target-open.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not-with-target-open.js
new file mode 100644
index 0000000000000..8a84f332124ce
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not-with-target-open.js
@@ -0,0 +1,546 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/XY.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./Xy" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts"
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] FileWatcher:: Close:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/XY.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/XY.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types:
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types:
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts:
+  {}
+/user/username/projects/myproject/link.ts:
+  {}
+/user/username/projects/myproject/tsconfig.json:
+  {}
+
+FsWatches *deleted*::
+/user/username/projects/myproject/XY.ts:
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject:
+  {}
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    open: true *changed*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "change",
+      "arguments": {
+        "file": "/user/username/projects/myproject/XY.ts",
+        "line": 1,
+        "offset": 1,
+        "endLine": 1,
+        "endOffset": 1,
+        "insertString": "// some comment\n"
+      },
+      "seq": 4,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts (Open) *changed*
+    version: SVC-2-1 *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 5,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+2: checkOne *new*
+
+Before running Timeout callback:: count: 1
+2: checkOne
+
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts SVC-2-1 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 5
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not.js b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not.js
new file mode 100644
index 0000000000000..f8f3ca89e9b71
--- /dev/null
+++ b/tests/baselines/reference/tsserver/forceConsistentCasingInFileNames/when-import-matches-disk-but-file-symlink-target-does-not.js
@@ -0,0 +1,499 @@
+currentDirectory:: /user/username/projects/myproject useCaseSensitiveFileNames: false
+Info seq  [hh:mm:ss:mss] Provided types map file "/typesMap.json" doesn't exist
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+export const a = 1;
+export const b = 2;
+
+
+//// [/user/username/projects/myproject/link.ts] symlink(/user/username/projects/myproject/XY.ts)
+//// [/user/username/projects/myproject/b.ts]
+import { a } from "./Xy";
+import { b } from "./link";
+
+a;b;
+
+
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true
+  }
+}
+
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "open",
+      "arguments": {
+        "file": "/user/username/projects/myproject/b.ts"
+      },
+      "seq": 1,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] Search path: /user/username/projects/myproject
+Info seq  [hh:mm:ss:mss] For info: /user/username/projects/myproject/b.ts :: Config file name: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Creating configuration project /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Config file
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingStart",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json",
+        "reason": "Creating possible configured project for /user/username/projects/myproject/b.ts to open"
+      }
+    }
+Info seq  [hh:mm:ss:mss] Config: /user/username/projects/myproject/tsconfig.json : {
+ "rootNames": [
+  "/user/username/projects/myproject/XY.ts",
+  "/user/username/projects/myproject/b.ts",
+  "/user/username/projects/myproject/link.ts"
+ ],
+ "options": {
+  "forceConsistentCasingInFileNames": true,
+  "configFilePath": "/user/username/projects/myproject/tsconfig.json"
+ }
+}
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject 1 undefined Config: /user/username/projects/myproject/tsconfig.json WatchType: Wild card directory
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/node_modules/@types 1 undefined Project: /user/username/projects/myproject/tsconfig.json WatchType: Type roots
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 1 projectProgramVersion: 0 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-1 "export const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+
+	../../../../a/lib/lib.d.ts
+	  Default library for target 'es5'
+	XY.ts
+	  Matched by default include pattern '**/*'
+	  Imported via "./Xy" from file 'b.ts'
+	link.ts
+	  Imported via "./link" from file 'b.ts'
+	  Matched by default include pattern '**/*'
+	b.ts
+	  Matched by default include pattern '**/*'
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "projectLoadingFinish",
+      "body": {
+        "projectName": "/user/username/projects/myproject/tsconfig.json"
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "telemetry",
+      "body": {
+        "telemetryEventName": "projectInfo",
+        "payload": {
+          "projectId": "4a33d78ee40d836c4f4e64c59aed976628aea0013be9585c5ff171dfc41baf98",
+          "fileStats": {
+            "js": 0,
+            "jsSize": 0,
+            "jsx": 0,
+            "jsxSize": 0,
+            "ts": 3,
+            "tsSize": 140,
+            "tsx": 0,
+            "tsxSize": 0,
+            "dts": 1,
+            "dtsSize": 334,
+            "deferred": 0,
+            "deferredSize": 0
+          },
+          "compilerOptions": {
+            "forceConsistentCasingInFileNames": true
+          },
+          "typeAcquisition": {
+            "enable": false,
+            "include": false,
+            "exclude": false
+          },
+          "extends": false,
+          "files": false,
+          "include": false,
+          "exclude": false,
+          "compileOnSave": false,
+          "configFileName": "tsconfig.json",
+          "projectType": "configured",
+          "languageServiceEnabled": true,
+          "version": "FakeVersion"
+        }
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "configFileDiag",
+      "body": {
+        "triggerFile": "/user/username/projects/myproject/b.ts",
+        "configFile": "/user/username/projects/myproject/tsconfig.json",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] Open files: 
+Info seq  [hh:mm:ss:mss] 	FileName: /user/username/projects/myproject/b.ts ProjectRootPath: undefined
+Info seq  [hh:mm:ss:mss] 		Projects: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+PolledWatches::
+/user/username/projects/myproject/node_modules/@types: *new*
+  {"pollingInterval":500}
+/user/username/projects/node_modules/@types: *new*
+  {"pollingInterval":500}
+
+FsWatches::
+/a/lib/lib.d.ts: *new*
+  {}
+/user/username/projects/myproject/XY.ts: *new*
+  {}
+/user/username/projects/myproject/link.ts: *new*
+  {}
+/user/username/projects/myproject/tsconfig.json: *new*
+  {}
+
+FsWatchesRecursive::
+/user/username/projects/myproject: *new*
+  {}
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *new*
+    projectStateVersion: 1
+    projectProgramVersion: 1
+
+ScriptInfos::
+/a/lib/lib.d.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open) *new*
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *new*
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before request
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 2,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 1
+1: checkOne *new*
+
+Before running Timeout callback:: count: 1
+1: checkOne
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 0
+
+Immedidate callback:: count: 1
+1: semanticCheck *new*
+
+Before running Immedidate callback:: count: 1
+1: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+2: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+2: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 2
+      }
+    }
+After running Immedidate callback:: count: 0
+
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/XY.ts 1:: WatchInfo: /user/username/projects/myproject/XY.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Info seq  [hh:mm:ss:mss] Scheduled: /user/username/projects/myproject/tsconfig.json, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/link.ts 1:: WatchInfo: /user/username/projects/myproject/link.ts 500 undefined WatchType: Closed Script info
+Before request
+//// [/user/username/projects/myproject/XY.ts]
+// some comment
+export const a = 1;
+export const b = 2;
+
+
+
+Timeout callback:: count: 2
+4: /user/username/projects/myproject/tsconfig.json *new*
+5: *ensureProjectForOpenFiles* *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2 *changed*
+    projectProgramVersion: 1
+    dirty: true *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *changed*
+    version: Text-1
+    pendingReloadFromDisk: true *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Info seq  [hh:mm:ss:mss] request:
+    {
+      "command": "geterr",
+      "arguments": {
+        "delay": 0,
+        "files": [
+          "/user/username/projects/myproject/b.ts"
+        ]
+      },
+      "seq": 3,
+      "type": "request"
+    }
+Info seq  [hh:mm:ss:mss] response:
+    {
+      "responseRequired": false
+    }
+After request
+
+Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne *new*
+
+Before running Timeout callback:: count: 3
+4: /user/username/projects/myproject/tsconfig.json
+5: *ensureProjectForOpenFiles*
+6: checkOne
+
+Invoking Timeout callback:: timeoutId:: 6:: checkOne
+Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json
+Info seq  [hh:mm:ss:mss] Finishing updateGraphWorker: Project: /user/username/projects/myproject/tsconfig.json projectStateVersion: 2 projectProgramVersion: 1 structureChanged: false structureIsReused:: Completely Elapsed:: *ms
+Info seq  [hh:mm:ss:mss] Project '/user/username/projects/myproject/tsconfig.json' (Configured)
+Info seq  [hh:mm:ss:mss] 	Files (4)
+	/a/lib/lib.d.ts Text-1 "/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }"
+	/user/username/projects/myproject/XY.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/link.ts Text-2 "// some comment\nexport const a = 1;\nexport const b = 2;\n"
+	/user/username/projects/myproject/b.ts SVC-1-0 "import { a } from \"./Xy\";\nimport { b } from \"./link\";\n\na;b;\n"
+
+Info seq  [hh:mm:ss:mss] -----------------------------------------------
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "syntaxDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+After running Timeout callback:: count: 2
+
+Immedidate callback:: count: 1
+3: semanticCheck *new*
+
+Projects::
+/user/username/projects/myproject/tsconfig.json (Configured) *changed*
+    projectStateVersion: 2
+    projectProgramVersion: 1
+    dirty: false *changed*
+
+ScriptInfos::
+/a/lib/lib.d.ts
+    version: Text-1
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/XY.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+/user/username/projects/myproject/b.ts (Open)
+    version: SVC-1-0
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json *default*
+/user/username/projects/myproject/link.ts *changed*
+    version: Text-2 *changed*
+    pendingReloadFromDisk: false *changed*
+    containingProjects: 1
+        /user/username/projects/myproject/tsconfig.json
+
+Before running Immedidate callback:: count: 1
+3: semanticCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "semanticDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": [
+          {
+            "start": {
+              "line": 1,
+              "offset": 19
+            },
+            "end": {
+              "line": 1,
+              "offset": 25
+            },
+            "text": "File name '/user/username/projects/myproject/Xy.ts' differs from already included file name '/user/username/projects/myproject/XY.ts' only in casing.\n  The file is in the program because:\n    Matched by default include pattern '**/*'\n    Imported via \"./Xy\" from file '/user/username/projects/myproject/b.ts'",
+            "code": 1149,
+            "category": "error"
+          }
+        ]
+      }
+    }
+After running Immedidate callback:: count: 1
+
+Immedidate callback:: count: 1
+4: suggestionCheck *new*
+
+Before running Immedidate callback:: count: 1
+4: suggestionCheck
+
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "suggestionDiag",
+      "body": {
+        "file": "/user/username/projects/myproject/b.ts",
+        "diagnostics": []
+      }
+    }
+Info seq  [hh:mm:ss:mss] event:
+    {
+      "seq": 0,
+      "type": "event",
+      "event": "requestCompleted",
+      "body": {
+        "request_seq": 3
+      }
+    }
+After running Immedidate callback:: count: 0
diff --git a/tests/baselines/reference/tsserver/symLinks/module-resolution-with-path-mapping-when-project-compiles-from-sources.js b/tests/baselines/reference/tsserver/symLinks/module-resolution-with-path-mapping-when-project-compiles-from-sources.js
index 9a29b0c5f9317..d7d0add257e62 100644
--- a/tests/baselines/reference/tsserver/symLinks/module-resolution-with-path-mapping-when-project-compiles-from-sources.js
+++ b/tests/baselines/reference/tsserver/symLinks/module-resolution-with-path-mapping-when-project-compiles-from-sources.js
@@ -364,6 +364,9 @@ Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Triggered with /users/
 Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Triggered with /users/username/projects/myproject/javascript/packages/recognizers-date-time/node_modules/@microsoft :: WatchInfo: /users/username/projects/myproject/javascript/packages/recognizers-date-time/node_modules 1 undefined Project: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json WatchType: Failed Lookup Locations
 Info seq  [hh:mm:ss:mss] Scheduled: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.jsonFailedLookupInvalidation, Cancelled earlier one
 Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Triggered with /users/username/projects/myproject/javascript/packages/recognizers-date-time/node_modules/@microsoft :: WatchInfo: /users/username/projects/myproject/javascript/packages/recognizers-date-time/node_modules 1 undefined Project: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json WatchType: Failed Lookup Locations
+Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Triggered with /users/username/projects/myproject/javascript/packages/recognizers-text :: WatchInfo: /users/username/projects/myproject/javascript/packages/recognizers-text 1 undefined Project: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json WatchType: Failed Lookup Locations
+Info seq  [hh:mm:ss:mss] Scheduled: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.jsonFailedLookupInvalidation, Cancelled earlier one
+Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Triggered with /users/username/projects/myproject/javascript/packages/recognizers-text :: WatchInfo: /users/username/projects/myproject/javascript/packages/recognizers-text 1 undefined Project: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json WatchType: Failed Lookup Locations
 Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Triggered with /users/username/projects/myproject/javascript/packages/recognizers-date-time/node_modules/@microsoft/recognizers-text :: WatchInfo: /users/username/projects/myproject/javascript/packages/recognizers-date-time/node_modules 1 undefined Project: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json WatchType: Failed Lookup Locations
 Info seq  [hh:mm:ss:mss] Scheduled: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.jsonFailedLookupInvalidation, Cancelled earlier one
 Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Triggered with /users/username/projects/myproject/javascript/packages/recognizers-date-time/node_modules/@microsoft/recognizers-text :: WatchInfo: /users/username/projects/myproject/javascript/packages/recognizers-date-time/node_modules 1 undefined Project: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json WatchType: Failed Lookup Locations
@@ -377,7 +380,7 @@ Info seq  [hh:mm:ss:mss] DirectoryWatcher:: Triggered with /users/username/proje
 Info seq  [hh:mm:ss:mss] Scheduled: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.jsonFailedLookupInvalidation, Cancelled earlier one
 Info seq  [hh:mm:ss:mss] Elapsed:: *ms DirectoryWatcher:: Triggered with /users/username/projects/myproject/javascript/packages/recognizers-text/dist/types/recognizers-text.d.ts :: WatchInfo: /users/username/projects/myproject/javascript/packages/recognizers-text 1 undefined Project: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json WatchType: Failed Lookup Locations
 Before running Timeout callback:: count: 1
-8: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.jsonFailedLookupInvalidation
+9: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.jsonFailedLookupInvalidation
 //// [/users/username/projects/myproject/javascript/packages/recognizers-date-time/node_modules/@microsoft/recognizers-text] symlink(/users/username/projects/myproject/javascript/packages/recognizers-text)
 //// [/users/username/projects/myproject/javascript/packages/recognizers-text/dist/types/recognizers-text.d.ts]
 export class C { method(): number; }
@@ -426,7 +429,7 @@ FsWatchesRecursive::
   {}
 
 Timeout callback:: count: 1
-8: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.jsonFailedLookupInvalidation *new*
+9: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.jsonFailedLookupInvalidation *new*
 
 Info seq  [hh:mm:ss:mss] Running: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.jsonFailedLookupInvalidation
 Info seq  [hh:mm:ss:mss] Scheduled: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json
@@ -434,8 +437,8 @@ Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
 After running Timeout callback:: count: 2
 
 Timeout callback:: count: 2
-9: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json *new*
-10: *ensureProjectForOpenFiles* *new*
+10: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json *new*
+11: *ensureProjectForOpenFiles* *new*
 
 Projects::
 /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json (Configured) *changed*
@@ -444,8 +447,8 @@ Projects::
     dirty: true *changed*
 
 Before running Timeout callback:: count: 2
-9: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json
-10: *ensureProjectForOpenFiles*
+10: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json
+11: *ensureProjectForOpenFiles*
 
 Info seq  [hh:mm:ss:mss] Running: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json
 Info seq  [hh:mm:ss:mss] Starting updateGraphWorker: Project: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json
@@ -596,10 +599,10 @@ Info seq  [hh:mm:ss:mss] response:
 After request
 
 Timeout callback:: count: 1
-11: checkOne *new*
+12: checkOne *new*
 
 Before running Timeout callback:: count: 1
-11: checkOne
+12: checkOne
 
 Info seq  [hh:mm:ss:mss] event:
     {
@@ -663,8 +666,8 @@ Info seq  [hh:mm:ss:mss] Scheduled: /users/username/projects/myproject/javascrip
 Info seq  [hh:mm:ss:mss] Scheduled: *ensureProjectForOpenFiles*
 Info seq  [hh:mm:ss:mss] Elapsed:: *ms FileWatcher:: Triggered with /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json 1:: WatchInfo: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json 2000 undefined Project: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json WatchType: Config file
 Before running Timeout callback:: count: 2
-12: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json
-13: *ensureProjectForOpenFiles*
+13: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json
+14: *ensureProjectForOpenFiles*
 //// [/users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json]
 {
   "compilerOptions": {
@@ -684,8 +687,8 @@ Before running Timeout callback:: count: 2
 
 
 Timeout callback:: count: 2
-12: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json *new*
-13: *ensureProjectForOpenFiles* *new*
+13: /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json *new*
+14: *ensureProjectForOpenFiles* *new*
 
 Projects::
 /users/username/projects/myproject/javascript/packages/recognizers-date-time/tsconfig.json (Configured) *changed*