diff --git a/package.json b/package.json
index fa3aebb7c..e58681eae 100644
--- a/package.json
+++ b/package.json
@@ -72,6 +72,7 @@
   },
   "devDependencies": {
     "coveralls": "^3.0.7",
+    "eol": "^0.9.1",
     "eslint": "^6.6.0",
     "fs-extra": "^8.1.0",
     "istanbul": "^0.4.2",
@@ -83,6 +84,8 @@
     "read-yaml": "^1.0.0",
     "rimraf": "^2.5.2",
     "sass-spec": "https://github.com/sass/sass-spec.git#7c3750d",
-    "unique-temp-dir": "^1.0.0"
+    "through2": "^3.0.1",
+    "unique-temp-dir": "^1.0.0",
+    "vinyl-fs": "^3.0.3"
   }
 }
diff --git a/scripts/pretest.js b/scripts/pretest.js
index 43f7f05cd..63f69ce77 100644
--- a/scripts/pretest.js
+++ b/scripts/pretest.js
@@ -1,68 +1,64 @@
 const {
-  createReadStream,
   existsSync: exists,
   mkdirSync,
-  copy,
-  outputFile
-} = require('fs-extra');
+} = require('fs');
 const {
   join,
-  basename,
-  dirname
+  normalize
 } = require('path');
-const { promisify } = require('util');
-const glob = promisify(require('glob'));
+const { Readable } = require('stream');
+const eol = require('eol');
 const { archiveFromStream } = require('node-hrx');
-const srcSpecPath = require('sass-spec').dirname.replace(/\\/g, '/');
-const destSpecPath = 'test/fixtures/sass-spec';
+const through2 = require('through2');
+const vfs = require('vinyl-fs');
+const Vinyl = require('vinyl');
+
+const srcSpecPath = normalize(require('sass-spec').dirname);
+const destSpecPath = normalize('test/fixtures/sass-spec');
 
 if(!exists(destSpecPath)) {
   mkdirSync(destSpecPath);
 }
 
-copy(srcSpecPath, destSpecPath)
-  .then(async () => {
-    const hrxFiles = await glob(srcSpecPath+'/**/*.hrx');
-    const archives = await Promise.all(
-      hrxFiles.map(async file => {
-        const archive = await archiveFromStream(createReadStream(file, 'utf8'));
+const extractHrxDir = function(dir) {
+  let files = [];
+  for (const entryName of dir) {
+    const entry = dir.contents[entryName];
+    if(entry.isDirectory()) {
+      files = files.concat(extractHrxDir(entry));
+    } else {
+      files.push(entry);
+    }
+  }
 
-        return {
-          archive,
-          archivePath: file
-        };
-      })
-    );
-    const extractHrxDir = function(dir) {
-      let files = [];
-      for (const entryName of dir) {
-        const entry = dir.contents[entryName];
-        if(entry.isDirectory()) {
-          files = files.concat(extractHrxDir(entry));
-        } else {
-          files.push(entry);
-        }
-      }
+  return files;
+};
 
-      return files;
-    };
+vfs.src(
+  join(srcSpecPath, '**/*').replace(/\\/g, '/').replace(/^\w:/, '')
+).pipe(
+  through2.obj(async function(file, enc, callback) {
+    if(file.extname === '.hrx') {
+      const stream = Readable.from(eol.lf(file.contents.toString()));
+      const archive = await archiveFromStream(stream);
+      const archivedFiles = extractHrxDir(archive);
 
-    const extrFiles = archives.reduce(
-      (prevExtr, {archive, archivePath}) => {
-        const fileObjs = extractHrxDir(archive).map(innerFile => {
-          const path = join(
-            dirname(archivePath),
-            basename(archivePath, '.hrx'),
-            innerFile.path
-          ).replace(srcSpecPath, destSpecPath);
+      for (const fileObj of archivedFiles) {
+        const path = join(file.path.slice(0,-4), fileObj.path);
 
-          return { path, body: innerFile.body };
+        const extFile = new Vinyl({
+          cwd: file.cwd,
+          base: file.base,
+          path,
+          contents: Buffer.from(fileObj.body)
         });
 
-        return prevExtr.concat(fileObjs);
-      },
-      []
-    );
+        this.push(extFile);
+      }
 
-    return Promise.all(extrFiles.map(({path, body}) => outputFile(path, body)));
-  });
+      callback();
+    } else {
+      callback(null, file);
+    }
+  })
+).pipe(vfs.dest(destSpecPath));
diff --git a/test/spec.js b/test/spec.js
index e8dac9365..3e7ef55d6 100644
--- a/test/spec.js
+++ b/test/spec.js
@@ -10,7 +10,7 @@ var assert = require('assert'),
   readYaml = require('read-yaml'),
   mergeWith = require('lodash/mergeWith'),
   glob = require('glob'),
-  specPath = join(__dirname, 'fixtures/sass-spec/spec'),
+  specPath = 'test/fixtures/sass-spec/spec',
   impl = function(entry) { return entry.match(/(sass\/)?libsass.*/g) !== null; },
   version = 3.6;
 
@@ -118,8 +118,8 @@ var runTest = function(inputCssPath, options) {
         if (test.shouldFail) {
           const expectedError = read(test.errorPath, 'utf8').replace(/DEPRECATION WARNING:[\s\w().\-"]+\n\n/,'');
           assert.equal(
-            error.formatted.toString().split('\n')[0],
-            expectedError.toString().split('\n')[0],
+            (error.formatted.toString().split('\n')[0]).replace(/\r$/g, ''),
+            (expectedError.toString().split('\n')[0]).replace(/\r$/g, ''),
             'Should Error.\nOptions' + JSON.stringify(test.options)
           );
         } else if (exists(test.expectedPath)) {