diff --git a/Sources/SwiftFormat/Utilities/FileIterator.swift b/Sources/SwiftFormat/Utilities/FileIterator.swift
index 9d1a1d2c..1e128006 100644
--- a/Sources/SwiftFormat/Utilities/FileIterator.swift
+++ b/Sources/SwiftFormat/Utilities/FileIterator.swift
@@ -145,7 +145,7 @@ public struct FileIterator: Sequence, IteratorProtocol {
         // be displayed as relative paths. Otherwise, they will still be displayed as absolute
         // paths.
         let relativePath =
-          path.hasPrefix(workingDirectory.path)
+          path.hasPrefix(workingDirectory.path) && FileManager.default.currentDirectoryPath != "/"
           ? String(path.dropFirst(workingDirectory.path.count + 1))
           : path
         output =
diff --git a/Tests/SwiftFormatTests/Utilities/FileIteratorTests.swift b/Tests/SwiftFormatTests/Utilities/FileIteratorTests.swift
index ba482063..a4ef883a 100644
--- a/Tests/SwiftFormatTests/Utilities/FileIteratorTests.swift
+++ b/Tests/SwiftFormatTests/Utilities/FileIteratorTests.swift
@@ -31,8 +31,8 @@ final class FileIteratorTests: XCTestCase {
     #endif
     let seen = allFilesSeen(iteratingOver: [tmpdir], followSymlinks: false)
     XCTAssertEqual(seen.count, 2)
-    XCTAssertTrue(seen.contains { $0.hasSuffix("project/real1.swift") })
-    XCTAssertTrue(seen.contains { $0.hasSuffix("project/real2.swift") })
+      XCTAssertTrue(seen.contains { $0.path.hasSuffix("project/real1.swift") })
+      XCTAssertTrue(seen.contains { $0.path.hasSuffix("project/real2.swift") })
   }
 
   func testFollowSymlinks() throws {
@@ -41,10 +41,10 @@ final class FileIteratorTests: XCTestCase {
     #endif
     let seen = allFilesSeen(iteratingOver: [tmpdir], followSymlinks: true)
     XCTAssertEqual(seen.count, 3)
-    XCTAssertTrue(seen.contains { $0.hasSuffix("project/real1.swift") })
-    XCTAssertTrue(seen.contains { $0.hasSuffix("project/real2.swift") })
+      XCTAssertTrue(seen.contains { $0.path.hasSuffix("project/real1.swift") })
+      XCTAssertTrue(seen.contains { $0.path.hasSuffix("project/real2.swift") })
     // Hidden but found through the visible symlink project/link.swift
-    XCTAssertTrue(seen.contains { $0.hasSuffix("project/.hidden.swift") })
+      XCTAssertTrue(seen.contains { $0.path.hasSuffix("project/.hidden.swift") })
   }
 
   func testTraversesHiddenFilesIfExplicitlySpecified() throws {
@@ -56,8 +56,8 @@ final class FileIteratorTests: XCTestCase {
       followSymlinks: false
     )
     XCTAssertEqual(seen.count, 2)
-    XCTAssertTrue(seen.contains { $0.hasSuffix("project/.build/generated.swift") })
-    XCTAssertTrue(seen.contains { $0.hasSuffix("project/.hidden.swift") })
+      XCTAssertTrue(seen.contains { $0.path.hasSuffix("project/.build/generated.swift") })
+      XCTAssertTrue(seen.contains { $0.path.hasSuffix("project/.hidden.swift") })
   }
 
   func testDoesNotFollowSymlinksIfFollowSymlinksIsFalseEvenIfExplicitlySpecified() {
@@ -71,6 +71,26 @@ final class FileIteratorTests: XCTestCase {
     )
     XCTAssertTrue(seen.isEmpty)
   }
+
+    func testDoesNotTrimFirstCharacterOfPathIfRunningInRoot() throws {
+      // Make sure that we don't drop the begining of the path if we are running in root.
+      // https://github.com/swiftlang/swift-format/issues/862
+        FileManager.default.changeCurrentDirectoryPath("/")
+        let seen = allFilesSeen(iteratingOver: [tmpdir], followSymlinks: false)
+        XCTAssertEqual(seen.count, 2)
+        XCTAssertTrue(seen.contains { $0.path.hasPrefix("/private/var") })
+        XCTAssertTrue(seen.contains { $0.path.hasPrefix("/private/var") })
+    }
+
+    func testShowsRelativePaths() throws {
+      // Make sure that we still show the relative path if using them.
+      // https://github.com/swiftlang/swift-format/issues/862
+        FileManager.default.changeCurrentDirectoryPath(tmpdir.path)
+        let seen = allFilesSeen(iteratingOver: [URL(fileURLWithPath: ".")], followSymlinks: false)
+        XCTAssertEqual(seen.count, 2)
+        XCTAssertTrue(seen.contains { $0.relativePath == "project/real1.swift" })
+        XCTAssertTrue(seen.contains { $0.relativePath == "project/real2.swift" })
+    }
 }
 
 extension FileIteratorTests {
@@ -111,11 +131,11 @@ extension FileIteratorTests {
   }
 
   /// Computes the list of all files seen by using `FileIterator` to iterate over the given URLs.
-  private func allFilesSeen(iteratingOver urls: [URL], followSymlinks: Bool) -> [String] {
+  private func allFilesSeen(iteratingOver urls: [URL], followSymlinks: Bool) -> [URL] {
     let iterator = FileIterator(urls: urls, followSymlinks: followSymlinks)
-    var seen: [String] = []
+    var seen: [URL] = []
     for next in iterator {
-      seen.append(next.path)
+      seen.append(next)
     }
     return seen
   }