diff --git a/README.md b/README.md
index 225be48d..5ac0ba9f 100644
--- a/README.md
+++ b/README.md
@@ -249,85 +249,6 @@ module.exports = {
 };
 ```
 
-Note that when using `sass` (`Dart Sass`), **synchronous compilation is twice as fast as asynchronous compilation** by default, due to the overhead of asynchronous callbacks.
-To avoid this overhead, you can use the [fibers](https://www.npmjs.com/package/fibers) package to call asynchronous importers from the synchronous code path.
-
-We automatically inject the [`fibers`](https://github.com/laverdet/node-fibers) package (setup `sassOptions.fiber`) for `Node.js` less v16.0.0 if is possible (i.e. you need install the [`fibers`](https://github.com/laverdet/node-fibers) package).
-
-> **Warning**
->
-> Fibers is not compatible with `Node.js` v16.0.0 or later. Unfortunately, v8 commit [dacc2fee0f](https://github.com/v8/v8/commit/dacc2fee0f815823782a7e432c79c2a7767a4765) is a breaking change and workarounds are non-trivial. ([see introduction to readme](https://github.com/laverdet/node-fibers)).
-
-**package.json**
-
-```json
-{
-  "devDependencies": {
-    "sass-loader": "^7.2.0",
-    "sass": "^1.22.10",
-    "fibers": "^4.0.1"
-  }
-}
-```
-
-You can disable automatically injecting the [`fibers`](https://github.com/laverdet/node-fibers) package by passing a `false` value for the `sassOptions.fiber` option.
-
-**webpack.config.js**
-
-```js
-module.exports = {
-  module: {
-    rules: [
-      {
-        test: /\.s[ac]ss$/i,
-        use: [
-          "style-loader",
-          "css-loader",
-          {
-            loader: "sass-loader",
-            options: {
-              implementation: require("sass"),
-              sassOptions: {
-                fiber: false,
-              },
-            },
-          },
-        ],
-      },
-    ],
-  },
-};
-```
-
-You can also pass the `fiber` value using this code:
-
-**webpack.config.js**
-
-```js
-module.exports = {
-  module: {
-    rules: [
-      {
-        test: /\.s[ac]ss$/i,
-        use: [
-          "style-loader",
-          "css-loader",
-          {
-            loader: "sass-loader",
-            options: {
-              implementation: require("sass"),
-              sassOptions: {
-                fiber: require("fibers"),
-              },
-            },
-          },
-        ],
-      },
-    ],
-  },
-};
-```
-
 ### `sassOptions`
 
 Type:
@@ -338,7 +259,7 @@ type sassOptions =
   | ((
       content: string | Buffer,
       loaderContext: LoaderContext,
-      meta: any
+      meta: any,
     ) => import("sass").LegacyOptions<"async">);
 ```
 
diff --git a/src/index.js b/src/index.js
index 1541518f..e1fc3d7b 100644
--- a/src/index.js
+++ b/src/index.js
@@ -39,7 +39,7 @@ async function loader(content) {
     options,
     content,
     implementation,
-    useSourceMap
+    useSourceMap,
   );
   const shouldUseWebpackImporter =
     typeof options.webpackImporter === "boolean"
@@ -53,11 +53,11 @@ async function loader(content) {
       const { includePaths } = sassOptions;
 
       sassOptions.importer.push(
-        getWebpackImporter(this, implementation, includePaths)
+        getWebpackImporter(this, implementation, includePaths),
       );
     } else {
       sassOptions.importers.push(
-        getModernWebpackImporter(this, implementation)
+        getModernWebpackImporter(this, implementation),
       );
     }
   }
@@ -97,8 +97,8 @@ async function loader(content) {
     result.sourceMap
       ? result.sourceMap
       : result.map
-      ? JSON.parse(result.map)
-      : null;
+        ? JSON.parse(result.map)
+        : null;
 
   // Modify source paths only for webpack, otherwise we do nothing
   if (map && useSourceMap) {
@@ -108,7 +108,7 @@ async function loader(content) {
   // Modern API
   if (typeof result.loadedUrls !== "undefined") {
     result.loadedUrls
-      .filter((url) => url.protocol === "file:")
+      .filter((loadedUrl) => loadedUrl.protocol === "file:")
       .forEach((includedFile) => {
         const normalizedIncludedFile = url.fileURLToPath(includedFile);
 
diff --git a/src/utils.js b/src/utils.js
index 9b9895c6..14f63b31 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -82,16 +82,10 @@ function proxyCustomImporters(importers, loaderContext) {
         const self = { ...this, webpackLoaderContext: loaderContext };
 
         return importer.apply(self, args);
-      }
+      },
   );
 }
 
-function isSupportedFibers() {
-  const [nodeVersion] = process.versions.node.split(".");
-
-  return Number(nodeVersion) < 16;
-}
-
 /**
  * Derives the sass options from the loader context and normalizes its values with sane defaults.
  *
@@ -107,7 +101,7 @@ async function getSassOptions(
   loaderOptions,
   content,
   implementation,
-  useSourceMap
+  useSourceMap,
 ) {
   const options = loaderOptions.sassOptions
     ? typeof loaderOptions.sassOptions === "function"
@@ -216,34 +210,6 @@ async function getSassOptions(
   } else {
     sassOptions.file = resourcePath;
 
-    const isDartSass = implementation.info.includes("dart-sass");
-
-    if (isDartSass && isSupportedFibers()) {
-      const shouldTryToResolveFibers =
-        !sassOptions.fiber && sassOptions.fiber !== false;
-
-      if (shouldTryToResolveFibers) {
-        let fibers;
-
-        try {
-          fibers = require.resolve("fibers");
-        } catch (_error) {
-          // Nothing
-        }
-
-        if (fibers) {
-          // eslint-disable-next-line global-require, import/no-dynamic-require
-          sassOptions.fiber = require(fibers);
-        }
-      } else if (sassOptions.fiber === false) {
-        // Don't pass the `fiber` option for `sass` (`Dart Sass`)
-        delete sassOptions.fiber;
-      }
-    } else {
-      // Don't pass the `fiber` option for `node-sass`
-      delete sassOptions.fiber;
-    }
-
     // opt.outputStyle
     if (!sassOptions.outputStyle && isProductionLikeMode(loaderContext)) {
       sassOptions.outputStyle = "compressed";
@@ -259,7 +225,7 @@ async function getSassOptions(
       sassOptions.sourceMap = true;
       sassOptions.outFile = path.join(
         loaderContext.rootContext,
-        "style.css.map"
+        "style.css.map",
       );
       sassOptions.sourceMapContents = true;
       sassOptions.omitSourceMapUrl = true;
@@ -285,7 +251,7 @@ async function getSassOptions(
           Array.isArray(sassOptions.importer)
             ? sassOptions.importer.slice()
             : [sassOptions.importer],
-          loaderContext
+          loaderContext,
         )
       : [];
 
@@ -294,6 +260,7 @@ async function getSassOptions(
       loaderOptions.webpackImporter === false &&
       sassOptions.importer.length === 0
     ) {
+      // eslint-disable-next-line no-undefined
       sassOptions.importer = undefined;
     }
 
@@ -305,15 +272,15 @@ async function getSassOptions(
           (includePath) =>
             path.isAbsolute(includePath)
               ? includePath
-              : path.join(process.cwd(), includePath)
-        )
+              : path.join(process.cwd(), includePath),
+        ),
       )
       .concat(
         process.env.SASS_PATH
           ? process.env.SASS_PATH.split(
-              process.platform === "win32" ? ";" : ":"
+              process.platform === "win32" ? ";" : ":",
             )
-          : []
+          : [],
       );
 
     if (typeof sassOptions.charset === "undefined") {
@@ -354,7 +321,7 @@ function getPossibleRequests(
   // eslint-disable-next-line no-shadow
   url,
   forWebpackResolver = false,
-  fromImport = false
+  fromImport = false,
 ) {
   let request = url;
 
@@ -401,13 +368,13 @@ function getPossibleRequests(
                 `${normalizedDirname}_${basenameWithoutExtension}.import${extension}`,
                 `${normalizedDirname}${basenameWithoutExtension}.import${extension}`,
               ]
-            : []
+            : [],
         )
         .concat([
           `${normalizedDirname}_${basename}`,
           `${normalizedDirname}${basename}`,
         ])
-        .concat(forWebpackResolver ? [url] : [])
+        .concat(forWebpackResolver ? [url] : []),
     ),
   ];
 }
@@ -480,7 +447,7 @@ const IS_NATIVE_WIN32_PATH = /^[a-z]:[/\\]|^\\\\/i;
 function getWebpackResolver(
   resolverFactory,
   implementation,
-  includePaths = []
+  includePaths = [],
 ) {
   const isDartSass =
     implementation && implementation.info.includes("dart-sass");
@@ -505,7 +472,7 @@ function getWebpackResolver(
       modules: [],
       restrictions: [/\.((sa|sc|c)ss)$/i],
       preferRelative: true,
-    })
+    }),
   );
   const sassImportResolve = promiseResolve(
     resolverFactory({
@@ -520,7 +487,7 @@ function getWebpackResolver(
       modules: [],
       restrictions: [/\.((sa|sc|c)ss)$/i],
       preferRelative: true,
-    })
+    }),
   );
   const webpackModuleResolve = promiseResolve(
     resolverFactory({
@@ -531,7 +498,7 @@ function getWebpackResolver(
       extensions: [".sass", ".scss", ".css"],
       restrictions: [/\.((sa|sc|c)ss)$/i],
       preferRelative: true,
-    })
+    }),
   );
   const webpackImportResolve = promiseResolve(
     resolverFactory({
@@ -542,7 +509,7 @@ function getWebpackResolver(
       extensions: [".sass", ".scss", ".css"],
       restrictions: [/\.((sa|sc|c)ss)$/i],
       preferRelative: true,
-    })
+    }),
   );
 
   return (context, request, fromImport) => {
@@ -592,7 +559,7 @@ function getWebpackResolver(
       const sassPossibleRequests = getPossibleRequests(
         request,
         false,
-        fromImport
+        fromImport,
       );
 
       // `node-sass` calls our importer before `1. Filesystem imports relative to the base file.`, so we need emulate this too
@@ -612,14 +579,14 @@ function getWebpackResolver(
             context,
             possibleRequests: sassPossibleRequests,
           };
-        })
+        }),
       );
     }
 
     const webpackPossibleRequests = getPossibleRequests(
       request,
       true,
-      fromImport
+      fromImport,
     );
 
     resolutionMap = resolutionMap.concat({
@@ -649,7 +616,7 @@ function getWebpackImporter(loaderContext, implementation, includePaths) {
   const resolve = getWebpackResolver(
     loaderContext.getResolve,
     implementation,
-    includePaths
+    includePaths,
   );
 
   return function importer(originalUrl, prev, done) {
@@ -724,7 +691,7 @@ function getCompileFn(implementation, options) {
 
     nodeSassJobQueue = async.queue(
       implementation.render.bind(implementation),
-      threadPoolSize - 1
+      threadPoolSize - 1,
     );
   }
 
@@ -740,7 +707,7 @@ function getCompileFn(implementation, options) {
           }
 
           resolve(result);
-        }
+        },
       );
     });
 }
@@ -825,6 +792,5 @@ export {
   getWebpackImporter,
   getCompileFn,
   normalizeSourceMap,
-  isSupportedFibers,
   errorFactory,
 };
diff --git a/test/__snapshots__/sassOptions-option.test.js.snap b/test/__snapshots__/sassOptions-option.test.js.snap
index 12f5057b..01221eae 100644
--- a/test/__snapshots__/sassOptions-option.test.js.snap
+++ b/test/__snapshots__/sassOptions-option.test.js.snap
@@ -1,299 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('dart-sass', 'legacy' API, 'sass' syntax): css 1`] = `
-"@charset "UTF-8";
-@import "./file.css";
-body {
-  font: 100% Helvetica, sans-serif;
-  color: #333;
-}
-
-nav ul {
-  margin: 0;
-  padding: 0;
-  list-style: none;
-}
-nav li {
-  display: inline-block;
-}
-nav a {
-  display: block;
-  padding: 6px 12px;
-  text-decoration: none;
-}
-
-.box {
-  -webkit-border-radius: 10px;
-  -moz-border-radius: 10px;
-  -ms-border-radius: 10px;
-  border-radius: 10px;
-}
-
-.message, .warning, .error, .success {
-  border: 1px solid #ccc;
-  padding: 10px;
-  color: #333;
-}
-
-.success {
-  border-color: green;
-}
-
-.error {
-  border-color: red;
-}
-
-.warning {
-  border-color: yellow;
-}
-
-.foo:before {
-  content: "\\e0c6";
-}
-
-.bar:before {
-  content: "∑";
-}"
-`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('dart-sass', 'legacy' API, 'sass' syntax): errors 1`] = `[]`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('dart-sass', 'legacy' API, 'sass' syntax): warnings 1`] = `[]`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('dart-sass', 'legacy' API, 'scss' syntax): css 1`] = `
-"@charset "UTF-8";
-@import "./file.css";
-body {
-  font: 100% Helvetica, sans-serif;
-  color: #333;
-}
-
-nav ul {
-  margin: 0;
-  padding: 0;
-  list-style: none;
-}
-nav li {
-  display: inline-block;
-}
-nav a {
-  display: block;
-  padding: 6px 12px;
-  text-decoration: none;
-}
-
-.box {
-  -webkit-border-radius: 10px;
-  -moz-border-radius: 10px;
-  -ms-border-radius: 10px;
-  border-radius: 10px;
-}
-
-.foo:before {
-  content: "\\e0c6";
-}
-
-.bar:before {
-  content: "∑";
-}"
-`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('dart-sass', 'legacy' API, 'scss' syntax): errors 1`] = `[]`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('dart-sass', 'legacy' API, 'scss' syntax): warnings 1`] = `[]`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('node-sass', 'legacy' API, 'sass' syntax): css 1`] = `
-"@charset "UTF-8";
-@import url(./file.css);
-body {
-  font: 100% Helvetica, sans-serif;
-  color: #333; }
-
-nav ul {
-  margin: 0;
-  padding: 0;
-  list-style: none; }
-
-nav li {
-  display: inline-block; }
-
-nav a {
-  display: block;
-  padding: 6px 12px;
-  text-decoration: none; }
-
-.box {
-  -webkit-border-radius: 10px;
-  -moz-border-radius: 10px;
-  -ms-border-radius: 10px;
-  border-radius: 10px; }
-
-.message, .success, .error, .warning {
-  border: 1px solid #ccc;
-  padding: 10px;
-  color: #333; }
-
-.success {
-  border-color: green; }
-
-.error {
-  border-color: red; }
-
-.warning {
-  border-color: yellow; }
-
-.foo:before {
-  content: ""; }
-
-.bar:before {
-  content: "∑"; }
-"
-`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('node-sass', 'legacy' API, 'sass' syntax): errors 1`] = `[]`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('node-sass', 'legacy' API, 'sass' syntax): warnings 1`] = `[]`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('node-sass', 'legacy' API, 'scss' syntax): css 1`] = `
-"@charset "UTF-8";
-@import url(./file.css);
-body {
-  font: 100% Helvetica, sans-serif;
-  color: #333; }
-
-nav ul {
-  margin: 0;
-  padding: 0;
-  list-style: none; }
-
-nav li {
-  display: inline-block; }
-
-nav a {
-  display: block;
-  padding: 6px 12px;
-  text-decoration: none; }
-
-.box {
-  -webkit-border-radius: 10px;
-  -moz-border-radius: 10px;
-  -ms-border-radius: 10px;
-  border-radius: 10px; }
-
-.foo:before {
-  content: ""; }
-
-.bar:before {
-  content: "∑"; }
-"
-`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('node-sass', 'legacy' API, 'scss' syntax): errors 1`] = `[]`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('node-sass', 'legacy' API, 'scss' syntax): warnings 1`] = `[]`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('sass-embedded', 'legacy' API, 'sass' syntax): css 1`] = `
-"@charset "UTF-8";
-@import "./file.css";
-body {
-  font: 100% Helvetica, sans-serif;
-  color: #333;
-}
-
-nav ul {
-  margin: 0;
-  padding: 0;
-  list-style: none;
-}
-nav li {
-  display: inline-block;
-}
-nav a {
-  display: block;
-  padding: 6px 12px;
-  text-decoration: none;
-}
-
-.box {
-  -webkit-border-radius: 10px;
-  -moz-border-radius: 10px;
-  -ms-border-radius: 10px;
-  border-radius: 10px;
-}
-
-.message, .warning, .error, .success {
-  border: 1px solid #ccc;
-  padding: 10px;
-  color: #333;
-}
-
-.success {
-  border-color: green;
-}
-
-.error {
-  border-color: red;
-}
-
-.warning {
-  border-color: yellow;
-}
-
-.foo:before {
-  content: "\\e0c6";
-}
-
-.bar:before {
-  content: "∑";
-}"
-`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('sass-embedded', 'legacy' API, 'sass' syntax): errors 1`] = `[]`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('sass-embedded', 'legacy' API, 'sass' syntax): warnings 1`] = `[]`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('sass-embedded', 'legacy' API, 'scss' syntax): css 1`] = `
-"@charset "UTF-8";
-@import "./file.css";
-body {
-  font: 100% Helvetica, sans-serif;
-  color: #333;
-}
-
-nav ul {
-  margin: 0;
-  padding: 0;
-  list-style: none;
-}
-nav li {
-  display: inline-block;
-}
-nav a {
-  display: block;
-  padding: 6px 12px;
-  text-decoration: none;
-}
-
-.box {
-  -webkit-border-radius: 10px;
-  -moz-border-radius: 10px;
-  -ms-border-radius: 10px;
-  border-radius: 10px;
-}
-
-.foo:before {
-  content: "\\e0c6";
-}
-
-.bar:before {
-  content: "∑";
-}"
-`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('sass-embedded', 'legacy' API, 'scss' syntax): errors 1`] = `[]`;
-
-exports[`sassOptions option should don't use the "fibers" package when the "fiber" option is "false" ('sass-embedded', 'legacy' API, 'scss' syntax): warnings 1`] = `[]`;
-
 exports[`sassOptions option should ignore the "data" option ('dart-sass', 'legacy' API, 'sass' syntax): css 1`] = `
 "@charset "UTF-8";
 @import "./file.css";
diff --git a/test/helpers/getCodeFromBundle.js b/test/helpers/getCodeFromBundle.js
index 9fb2b3ed..3846e54d 100644
--- a/test/helpers/getCodeFromBundle.js
+++ b/test/helpers/getCodeFromBundle.js
@@ -22,7 +22,7 @@ function getCodeFromBundle(stats, compiler, asset) {
     `${code};\nmodule.exports = sassLoaderExport;`,
     {
       module: {},
-    }
+    },
   );
 
   return result.default;
diff --git a/test/helpers/getCodeFromSass.js b/test/helpers/getCodeFromSass.js
index 2b4e4d4b..7196a1bf 100644
--- a/test/helpers/getCodeFromSass.js
+++ b/test/helpers/getCodeFromSass.js
@@ -1,4 +1,4 @@
-import url from "url";
+import { pathToFileURL } from "url";
 import path from "path";
 import fs from "fs";
 
@@ -35,7 +35,7 @@ async function getCodeFromSass(testId, options, context = {}) {
       isIndentedSyntax ? "\n" : ";"
     }\n${fs.readFileSync(path.resolve(__dirname, "..", testId), "utf8")}`;
   } else if (isModernAPI) {
-    const URL = url.pathToFileURL(path.resolve(__dirname, "..", testId));
+    const URL = pathToFileURL(path.resolve(__dirname, "..", testId));
 
     sassOptions.url = URL;
     sassOptions.data = fs.readFileSync(URL).toString();
@@ -47,96 +47,97 @@ async function getCodeFromSass(testId, options, context = {}) {
   const testNodeModules = path.resolve(testFolder, "node_modules") + path.sep;
   const pathToSassPackageWithIndexFile = path.resolve(
     testFolder,
-    "node_modules/sass-package-with-index/index.sass"
+    "node_modules/sass-package-with-index/index.sass",
   );
   const pathToSassPackageWithExportsFields = path.resolve(
     testFolder,
-    "node_modules/package-with-exports/style.scss"
+    "node_modules/package-with-exports/style.scss",
   );
   const pathToSassPackageWithExportsFieldsAndCustomConditionReplacer = () => {
     if (context.packageExportsCustomConditionTestVariant === 1) {
       return path.resolve(
         testFolder,
-        "node_modules/package-with-exports-and-custom-condition/style-1.scss"
+        "node_modules/package-with-exports-and-custom-condition/style-1.scss",
       );
     }
 
     if (context.packageExportsCustomConditionTestVariant === 2) {
       return path.resolve(
         testFolder,
-        "node_modules/package-with-exports-and-custom-condition/style-2.scss"
+        "node_modules/package-with-exports-and-custom-condition/style-2.scss",
       );
     }
 
+    // eslint-disable-next-line no-console
     console.warn(
-      "Expected to receive .packageExportsCustomConditionTestVariant to properly resolve stylesheet in sass only compilation. "
+      "Expected to receive .packageExportsCustomConditionTestVariant to properly resolve stylesheet in sass only compilation. ",
     );
     return "";
   };
 
   const pathToSCSSPackageWithIndexFile = path.resolve(
     testFolder,
-    "node_modules/scss-package-with-index/index.scss"
+    "node_modules/scss-package-with-index/index.scss",
   );
   const pathToSassPackageWithUnderscoreIndexFile = path.resolve(
     testFolder,
-    "node_modules/sass-package-with-underscore-index/_index.sass"
+    "node_modules/sass-package-with-underscore-index/_index.sass",
   );
   const pathToSCSSPackageWithUnderscoreIndexFile = path.resolve(
     testFolder,
-    "node_modules/scss-package-with-underscore-index/_index.scss"
+    "node_modules/scss-package-with-underscore-index/_index.scss",
   );
   const pathToSCSSUnderscoreDir = path.resolve(
     testFolder,
-    "scss/_underscore-dir/_index.scss"
+    "scss/_underscore-dir/_index.scss",
   );
   const pathToSCSSUnderscoreDir1 = path.resolve(
     testFolder,
-    "scss/_underscore-dir-1/index.scss"
+    "scss/_underscore-dir-1/index.scss",
   );
   const pathToSCSSUnderscoreDir2 = path.resolve(
     testFolder,
-    "scss/_underscore-dir-2/_index.sass"
+    "scss/_underscore-dir-2/_index.sass",
   );
   const pathToSCSSUnderscoreDir3 = path.resolve(
     testFolder,
-    "scss/_underscore-dir-3/index.sass"
+    "scss/_underscore-dir-3/index.sass",
   );
   // Avoid `.css` extensions because `node-sass` doesn't compile them
   const pathToSCSSUnderscoreDir4 = path.resolve(
     testFolder,
-    "scss/_underscore-dir-4/_index"
+    "scss/_underscore-dir-4/_index",
   );
   // Avoid `.css` extensions because `node-sass` doesn't compile them
   const pathToSCSSUnderscoreDir5 = path.resolve(
     testFolder,
-    "scss/_underscore-dir-5/index"
+    "scss/_underscore-dir-5/index",
   );
   const pathToSassUnderscoreDir = path.resolve(
     testFolder,
-    "sass/_underscore-dir/_index.sass"
+    "sass/_underscore-dir/_index.sass",
   );
   const pathToSassUnderscoreDir1 = path.resolve(
     testFolder,
-    "sass/_underscore-dir-1/index.sass"
+    "sass/_underscore-dir-1/index.sass",
   );
   const pathToSassUnderscoreDir2 = path.resolve(
     testFolder,
-    "sass/_underscore-dir-2/_index.scss"
+    "sass/_underscore-dir-2/_index.scss",
   );
   const pathToSassUnderscoreDir3 = path.resolve(
     testFolder,
-    "sass/_underscore-dir-3/index.scss"
+    "sass/_underscore-dir-3/index.scss",
   );
   // Avoid `.css` extensions because `node-sass` doesn't compile them
   const pathToSassUnderscoreDir4 = path.resolve(
     testFolder,
-    "sass/_underscore-dir-4/_index"
+    "sass/_underscore-dir-4/_index",
   );
   // Avoid `.css` extensions because `node-sass` doesn't compile them
   const pathToSassUnderscoreDir5 = path.resolve(
     testFolder,
-    "sass/_underscore-dir-5/index"
+    "sass/_underscore-dir-5/index",
   );
   const pathToSCSSWord6 = path.resolve(testFolder, "scss/word-6/_index.scss");
   const pathToSCSSWord7 = path.resolve(testFolder, "scss/word-7/index.scss");
@@ -146,27 +147,27 @@ async function getCodeFromSass(testId, options, context = {}) {
   const pathToSCSSWord11 = path.resolve(testFolder, "scss/word-11/index");
   const pathToSCSSDirectory6 = path.resolve(
     testFolder,
-    "scss/directory-6/file/_index.scss"
+    "scss/directory-6/file/_index.scss",
   );
   const pathToSCSSDirectory7 = path.resolve(
     testFolder,
-    "scss/directory-7/file/index.scss"
+    "scss/directory-7/file/index.scss",
   );
   const pathToSCSSDirectory8 = path.resolve(
     testFolder,
-    "scss/directory-8/file/_index.sass"
+    "scss/directory-8/file/_index.sass",
   );
   const pathToSCSSDirectory9 = path.resolve(
     testFolder,
-    "scss/directory-9/file/index.sass"
+    "scss/directory-9/file/index.sass",
   );
   const pathToSCSSDirectory10 = path.resolve(
     testFolder,
-    "scss/directory-10/file/index"
+    "scss/directory-10/file/index",
   );
   const pathToSCSSDirectory11 = path.resolve(
     testFolder,
-    "scss/directory-11/file/index"
+    "scss/directory-11/file/index",
   );
   const pathToSassWord6 = path.resolve(testFolder, "sass/word-6/_index.sass");
   const pathToSassWord7 = path.resolve(testFolder, "sass/word-7/index.sass");
@@ -176,145 +177,145 @@ async function getCodeFromSass(testId, options, context = {}) {
   const pathToSassWord11 = path.resolve(testFolder, "sass/word-11/index");
   const pathToSassDirectory6 = path.resolve(
     testFolder,
-    "sass/directory-6/file/_index.sass"
+    "sass/directory-6/file/_index.sass",
   );
   const pathToSassDirectory7 = path.resolve(
     testFolder,
-    "sass/directory-7/file/index.sass"
+    "sass/directory-7/file/index.sass",
   );
   const pathToSassDirectory8 = path.resolve(
     testFolder,
-    "sass/directory-8/file/_index.scss"
+    "sass/directory-8/file/_index.scss",
   );
   const pathToSassDirectory9 = path.resolve(
     testFolder,
-    "sass/directory-9/file/index.scss"
+    "sass/directory-9/file/index.scss",
   );
   const pathToSassDirectory10 = path.resolve(
     testFolder,
-    "sass/directory-10/file/index"
+    "sass/directory-10/file/index",
   );
   const pathToSassDirectory11 = path.resolve(
     testFolder,
-    "sass/directory-11/file/index"
+    "sass/directory-11/file/index",
   );
   const pathToAlias = path.resolve(
     testFolder,
     path.extname(testId).slice(1),
     "another",
-    `alias.${path.extname(testId).slice(1)}`
+    `alias.${path.extname(testId).slice(1)}`,
   );
   const pathToSCSSSassField = path.resolve(
     testFolder,
-    "node_modules/scss-sass-field/nested/style.scss"
+    "node_modules/scss-sass-field/nested/style.scss",
   );
   const pathToSassSassField = path.resolve(
     testFolder,
-    "node_modules/sass-sass-field/nested/style.sass"
+    "node_modules/sass-sass-field/nested/style.sass",
   );
   const pathToSCSSStyleField = path.resolve(
     testFolder,
-    "node_modules/scss-style-field/nested/style.scss"
+    "node_modules/scss-style-field/nested/style.scss",
   );
   const pathToSassStyleField = path.resolve(
     testFolder,
-    "node_modules/sass-style-field/nested/style.sass"
+    "node_modules/sass-style-field/nested/style.sass",
   );
   const pathToSCSSMainField = path.resolve(
     testFolder,
-    "node_modules/scss-main-field/nested/style.scss"
+    "node_modules/scss-main-field/nested/style.scss",
   );
   const pathToSassMainField = path.resolve(
     testFolder,
-    "node_modules/sass-main-field/nested/style.sass"
+    "node_modules/sass-main-field/nested/style.sass",
   );
   const pathToSCSSAlias = path.resolve(
     testFolder,
-    "scss/directory-6/file/_index.scss"
+    "scss/directory-6/file/_index.scss",
   );
   const pathToSassAlias = path.resolve(
     testFolder,
-    "sass/directory-6/file/_index.sass"
+    "sass/directory-6/file/_index.sass",
   );
   const pathToSCSSIndexAlias = path.resolve(
     testFolder,
-    "scss/dir-with-underscore-index/_index.scss"
+    "scss/dir-with-underscore-index/_index.scss",
   );
   const pathToSassIndexAlias = path.resolve(
     testFolder,
-    "sass/dir-with-underscore-index/_index.sass"
+    "sass/dir-with-underscore-index/_index.sass",
   );
   const pathToScopedNpmPkg = path.resolve(
     testFolder,
-    "node_modules/@org/pkg/index.scss"
+    "node_modules/@org/pkg/index.scss",
   );
   const pathToScopedNpmFile = path.resolve(
     testFolder,
-    "node_modules/@org/style.scss"
+    "node_modules/@org/style.scss",
   );
   const pathToSCSSCustomSassField = path.resolve(
     testFolder,
-    "node_modules/scss-custom-sass-field/nested/style.scss"
+    "node_modules/scss-custom-sass-field/nested/style.scss",
   );
   const pathToSassCustomSassField = path.resolve(
     testFolder,
-    "node_modules/sass-custom-sass-field/nested/style.sass"
+    "node_modules/sass-custom-sass-field/nested/style.sass",
   );
   const pathToBootstrap3Entry = path.resolve(
     testFolder,
-    "../node_modules/bootstrap-sass/assets/stylesheets/_bootstrap.scss"
+    "../node_modules/bootstrap-sass/assets/stylesheets/_bootstrap.scss",
   );
   const pathToBootstrap3Package = path.resolve(
     testFolder,
-    "../node_modules/bootstrap-sass"
+    "../node_modules/bootstrap-sass",
   );
   const pathToBootstrap4Entry = path.resolve(
     testFolder,
-    "../node_modules/bootstrap-v4/scss/bootstrap.scss"
+    "../node_modules/bootstrap-v4/scss/bootstrap.scss",
   );
   const pathToBootstrap5Entry = path.resolve(
     testFolder,
-    "../node_modules/bootstrap-v5/scss/bootstrap.scss"
+    "../node_modules/bootstrap-v5/scss/bootstrap.scss",
   );
   const pathToModule = path.resolve(
     testFolder,
-    "node_modules/module/module.scss"
+    "node_modules/module/module.scss",
   );
   const pathToAnother = path.resolve(
     testFolder,
-    "node_modules/another/module.scss"
+    "node_modules/another/module.scss",
   );
   const pathToPackageWithStyleFieldAndCss = isSass
     ? path.resolve(
         testFolder,
-        "node_modules/package-with-style-field-and-css/sass/package-with-style-field-and-css.sass"
+        "node_modules/package-with-style-field-and-css/sass/package-with-style-field-and-css.sass",
       )
     : path.resolve(
         testFolder,
-        "node_modules/package-with-style-field-and-css/scss/package-with-style-field-and-css.scss"
+        "node_modules/package-with-style-field-and-css/scss/package-with-style-field-and-css.scss",
       );
   const pathToPackageWithJsAndCssMainFiles = path.resolve(
     testFolder,
-    "node_modules/package-with-js-and-css-main-files/index"
+    "node_modules/package-with-js-and-css-main-files/index",
   );
   const pathToPackageWithJsMainField = path.resolve(
     testFolder,
-    "node_modules/package-with-js-main-field/index.scss"
+    "node_modules/package-with-js-main-field/index.scss",
   );
   const pathToPackageWithIndex = path.resolve(
     testFolder,
-    "node_modules/package-with-index/_index.scss"
+    "node_modules/package-with-index/_index.scss",
   );
   const pathToLanguage = isSass
     ? path.resolve(testFolder, "sass/language.sass")
     : path.resolve(testFolder, "scss/language.scss");
   const pathToPackageWithSameImport = path.resolve(
     testFolder,
-    "node_modules/package-with-same-import/style.scss"
+    "node_modules/package-with-same-import/style.scss",
   );
   const pathToMaterial = path.resolve(
     __dirname,
-    "../../node_modules/@material"
+    "../../node_modules/@material",
   );
   const pathToCustomMainFiles = isSass
     ? path.resolve(testFolder, "sass/custom-main-files/custom.sass")
@@ -731,7 +732,7 @@ async function getCodeFromSass(testId, options, context = {}) {
         .replace(/^path-to-alias/, pathToAlias)
         .replace(
           /^package-with-style-field-and-css/,
-          pathToPackageWithStyleFieldAndCss
+          pathToPackageWithStyleFieldAndCss,
         )
         .replace(/^~scss-sass-field/, pathToSCSSSassField)
         .replace(/^~sass-sass-field/, pathToSassSassField)
@@ -745,27 +746,27 @@ async function getCodeFromSass(testId, options, context = {}) {
         .replace(/^~@sass$/, pathToSassAlias)
         .replace(
           /^~@path-to-scss-dir\/dir-with-underscore-index$/,
-          pathToSCSSIndexAlias
+          pathToSCSSIndexAlias,
         )
         .replace(
           /^~@path-to-scss-dir\/dir-with-underscore-index\/$/,
-          pathToSCSSIndexAlias
+          pathToSCSSIndexAlias,
         )
         .replace(
           /^~@path-to-sass-dir\/dir-with-underscore-index$/,
-          pathToSassIndexAlias
+          pathToSassIndexAlias,
         )
         .replace(
           /^~@path-to-sass-dir\/dir-with-underscore-index\/$/,
-          pathToSassIndexAlias
+          pathToSassIndexAlias,
         )
         .replace(
           /^~@\/path-to-scss-dir\/dir-with-underscore-index$/,
-          pathToSCSSIndexAlias
+          pathToSCSSIndexAlias,
         )
         .replace(
           /^~@\/path-to-sass-dir\/dir-with-underscore-index$/,
-          pathToSassIndexAlias
+          pathToSassIndexAlias,
         )
         .replace(/^~@org\/pkg/, pathToScopedNpmPkg)
         .replace(/^@org\/style/, pathToScopedNpmFile)
@@ -779,13 +780,13 @@ async function getCodeFromSass(testId, options, context = {}) {
         .replace(/^~another/, pathToAnother)
         .replace(
           /^~package-with-js-and-css-main-files/,
-          pathToPackageWithJsAndCssMainFiles
+          pathToPackageWithJsAndCssMainFiles,
         )
         .replace(/^~package-with-js-main-field/, pathToPackageWithJsMainField)
         .replace(/^~package-with-index/, pathToPackageWithIndex)
         .replace(
           /^package-with-exports-and-custom-condition$/,
-          pathToSassPackageWithExportsFieldsAndCustomConditionReplacer
+          pathToSassPackageWithExportsFieldsAndCustomConditionReplacer,
         )
         .replace(/^package-with-exports$/, pathToSassPackageWithExportsFields)
         .replace(/^file:\/\/\/language/, pathToLanguage)
@@ -795,7 +796,7 @@ async function getCodeFromSass(testId, options, context = {}) {
         .replace(/^file:\/\/\/sass\/language.sass/, pathToLanguage)
         .replace(
           /^package-with-same-import\/style/,
-          pathToPackageWithSameImport
+          pathToPackageWithSameImport,
         )
         .replace(/@material/, pathToMaterial)
         .replace(/custom-main-files/, pathToCustomMainFiles)
@@ -813,7 +814,7 @@ async function getCodeFromSass(testId, options, context = {}) {
           .concat(
             Array.isArray(sassOptions.importer)
               ? [...sassOptions.importer]
-              : [sassOptions.importer]
+              : [sassOptions.importer],
           )
           .concat([testImporter])
       : [testImporter];
@@ -829,14 +830,10 @@ async function getCodeFromSass(testId, options, context = {}) {
 
     ({ css, sourceMap: map } = await implementation.compileStringAsync(
       data,
-      rest
+      rest,
     ));
   } else {
     ({ css, map } = await new Promise((resolve, reject) => {
-      if (sassOptions.fiber === false) {
-        delete sassOptions.fiber;
-      }
-
       implementation.render(sassOptions, (error, result) => {
         if (error) {
           reject(error);
diff --git a/test/helpers/getCompiler.js b/test/helpers/getCompiler.js
index 8707ab5b..b95c32db 100644
--- a/test/helpers/getCompiler.js
+++ b/test/helpers/getCompiler.js
@@ -32,7 +32,7 @@ const output = (config) => {
   return {
     path: path.resolve(
       __dirname,
-      `../outputs/${config.output ? config.output : ""}`
+      `../outputs/${config.output ? config.output : ""}`,
     ),
     filename: "[name].bundle.js",
     library: "sassLoaderExport",
diff --git a/test/helpers/normalizeErrors.js b/test/helpers/normalizeErrors.js
index 248698bd..b00c19ca 100644
--- a/test/helpers/normalizeErrors.js
+++ b/test/helpers/normalizeErrors.js
@@ -19,6 +19,6 @@ export default (errors, needVerbose) =>
     removeCWD(
       needVerbose
         ? error.toString()
-        : error.toString().split("\n").slice(0, 2).join("\n")
-    )
+        : error.toString().split("\n").slice(0, 2).join("\n"),
+    ),
   );
diff --git a/test/implementation-option.test.js b/test/implementation-option.test.js
index d699a0f1..ead83b63 100644
--- a/test/implementation-option.test.js
+++ b/test/implementation-option.test.js
@@ -39,7 +39,7 @@ describe("implementation option", () => {
       const sassEmbeddedSpy = jest.spyOn(sassEmbedded, "render");
       const sassEmbeddedSpyModernAPI = jest.spyOn(
         sassEmbedded,
-        "compileStringAsync"
+        "compileStringAsync",
       );
 
       const testId = getTestId("language", "scss");
diff --git a/test/loader.test.js b/test/loader.test.js
index a5755896..a5e4abe1 100644
--- a/test/loader.test.js
+++ b/test/loader.test.js
@@ -79,7 +79,7 @@ describe("loader", () => {
       it(`should work ('${implementationName}', '${api}' API, '${syntax}' syntax) with the "memory" cache`, async () => {
         const cache = path.resolve(
           __dirname,
-          `./outputs/.cache/sass-loader/${implementationName}/${syntax}`
+          `./outputs/.cache/sass-loader/${implementationName}/${syntax}`,
         );
 
         await del(cache);
@@ -108,7 +108,7 @@ describe("loader", () => {
       it(`should work ('${implementationName}', '${api}' API, '${syntax}' syntax) with the "filesystem" cache`, async () => {
         const cache = path.resolve(
           __dirname,
-          `./outputs/.cache/sass-loader/${implementationName}/${syntax}`
+          `./outputs/.cache/sass-loader/${implementationName}/${syntax}`,
         );
 
         await del(cache);
@@ -163,8 +163,8 @@ describe("loader", () => {
 
         expect(
           stats.compilation.fileDependencies.has(
-            path.resolve(`./test/${syntax}/error.${syntax}`)
-          )
+            path.resolve(`./test/${syntax}/error.${syntax}`),
+          ),
         ).toBe(true);
         expect(getWarnings(stats)).toMatchSnapshot("warnings");
         expect(getErrors(stats)).toMatchSnapshot("errors");
@@ -181,13 +181,13 @@ describe("loader", () => {
 
         expect(
           stats.compilation.fileDependencies.has(
-            path.resolve(`./test/${syntax}/error-import.${syntax}`)
-          )
+            path.resolve(`./test/${syntax}/error-import.${syntax}`),
+          ),
         ).toBe(true);
         expect(
           stats.compilation.fileDependencies.has(
-            path.resolve(`./test/${syntax}/error.${syntax}`)
-          )
+            path.resolve(`./test/${syntax}/error.${syntax}`),
+          ),
         ).toBe(true);
         expect(getWarnings(stats)).toMatchSnapshot("warnings");
         expect(getErrors(stats)).toMatchSnapshot("errors");
@@ -204,8 +204,8 @@ describe("loader", () => {
 
         expect(
           stats.compilation.fileDependencies.has(
-            path.resolve(`./test/${syntax}/error-file-not-found.${syntax}`)
-          )
+            path.resolve(`./test/${syntax}/error-file-not-found.${syntax}`),
+          ),
         ).toBe(true);
         expect(getWarnings(stats)).toMatchSnapshot("warnings");
         expect(getErrors(stats)).toMatchSnapshot("errors");
@@ -222,8 +222,8 @@ describe("loader", () => {
 
         expect(
           stats.compilation.fileDependencies.has(
-            path.resolve(`./test/${syntax}/error-file-not-found-2.${syntax}`)
-          )
+            path.resolve(`./test/${syntax}/error-file-not-found-2.${syntax}`),
+          ),
         ).toBe(true);
         expect(getWarnings(stats)).toMatchSnapshot("warnings");
         expect(getErrors(stats)).toMatchSnapshot("errors");
@@ -340,7 +340,7 @@ describe("loader", () => {
       it(`should work when "@import" at-rules without extensions and do not start with "_" ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
         const testId = getTestId(
           "import-without-extension-and-underscore",
-          syntax
+          syntax,
         );
         const options = {
           implementation,
@@ -568,7 +568,7 @@ describe("loader", () => {
         it(`should prefer "mainFiles" over "mainFields" when the field contains "js" file ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
           const testId = getTestId(
             "import-prefer-main-files-over-main-fields",
-            syntax
+            syntax,
           );
           const options = {
             implementation,
@@ -590,7 +590,7 @@ describe("loader", () => {
         it(`should prefer "mainFiles" with extension over without ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
           const testId = getTestId(
             "import-prefer-main-files-with-extension",
-            syntax
+            syntax,
           );
           const options = {
             implementation,
@@ -646,21 +646,21 @@ describe("loader", () => {
                   __dirname,
                   syntax,
                   "another",
-                  `alias.${syntax}`
+                  `alias.${syntax}`,
                 ),
                 "@sass": path.resolve(
                   __dirname,
                   "sass",
                   "directory-6",
                   "file",
-                  "_index.sass"
+                  "_index.sass",
                 ),
                 "@scss": path.resolve(
                   __dirname,
                   "scss",
                   "directory-6",
                   "file",
-                  `_index.scss`
+                  `_index.scss`,
                 ),
                 "@path-to-scss-dir": path.resolve(__dirname, "scss"),
                 "@path-to-sass-dir": path.resolve(__dirname, "sass"),
@@ -838,7 +838,7 @@ describe("loader", () => {
         it(`should work with the "foundation-sites" package, adjusting CSS output ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
           const testId = getTestId(
             "foundation-sites-adjusting-css-output",
-            syntax
+            syntax,
           );
           const options = {
             implementation,
@@ -879,7 +879,7 @@ describe("loader", () => {
               : {
                   outputStyle: "compressed",
                 },
-          })
+          }),
         );
 
         expect(codeFromBundle.css).toBe(codeFromSass.css);
@@ -895,14 +895,14 @@ describe("loader", () => {
             ? {
                 loadPaths: [
                   path.resolve(
-                    `./test/node_modules/package-with-style-field-and-css/${syntax}`
+                    `./test/node_modules/package-with-style-field-and-css/${syntax}`,
                   ),
                 ],
               }
             : {
                 includePaths: [
                   path.resolve(
-                    `./test/node_modules/package-with-style-field-and-css/${syntax}`
+                    `./test/node_modules/package-with-style-field-and-css/${syntax}`,
                   ),
                 ],
               },
@@ -924,7 +924,7 @@ describe("loader", () => {
         it(`should load only sass/scss files for the "mainFiles" ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
           const testId = getTestId(
             "import-package-with-js-and-css-main-files",
-            syntax
+            syntax,
           );
           const options = {
             implementation,
@@ -966,12 +966,12 @@ describe("loader", () => {
               ? `${path.resolve("test", syntax, "sass_path")};${path.resolve(
                   "test",
                   syntax,
-                  "sass_path_other"
+                  "sass_path_other",
                 )}`
               : `${path.resolve("test", syntax, "sass_path")}:${path.resolve(
                   "test",
                   syntax,
-                  "sass_path_other"
+                  "sass_path_other",
                 )}`;
 
           const testId = getTestId("sass_path-env", syntax);
@@ -1016,7 +1016,7 @@ describe("loader", () => {
         it(`should respect resolving directory with the "index" file from "process.cwd()"  ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
           const testId = getTestId(
             "process-cwd-with-index-file-inside-directory",
-            syntax
+            syntax,
           );
           const options = {
             implementation,
@@ -1057,7 +1057,7 @@ describe("loader", () => {
         it(`should work with a package with "sass" and "exports" fields and a custom condition (theme1) ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
           const testId = getTestId(
             "import-package-with-exports-and-custom-condition",
-            syntax
+            syntax,
           );
           const options = {
             implementation,
@@ -1086,7 +1086,7 @@ describe("loader", () => {
         it(`should work with a package with "sass" and "exports" fields and a custom condition (theme2) ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
           const testId = getTestId(
             "import-package-with-exports-and-custom-condition",
-            syntax
+            syntax,
           );
           const options = {
             implementation,
@@ -1125,7 +1125,7 @@ describe("loader", () => {
                 "/language": path.resolve(
                   "./test",
                   syntax,
-                  `language.${syntax}`
+                  `language.${syntax}`,
                 ),
               },
             },
@@ -1172,13 +1172,13 @@ describe("loader", () => {
                   /\/scss\/language.scss/g,
                   `file:///${path
                     .resolve(__dirname, "scss/language.scss")
-                    .replace(/\\/g, "/")}`
+                    .replace(/\\/g, "/")}`,
                 )
                 .replace(
                   /\/sass\/language.sass/g,
                   `file:///${path
                     .resolve(__dirname, "sass/language.sass")
-                    .replace(/\\/g, "/")}`
+                    .replace(/\\/g, "/")}`,
                 ),
           };
           const compiler = getCompiler(testId, { loader: { options } });
@@ -1333,13 +1333,13 @@ describe("loader", () => {
 
           expect(
             stats.compilation.fileDependencies.has(
-              path.resolve(`./test/${syntax}/error-use.${syntax}`)
-            )
+              path.resolve(`./test/${syntax}/error-use.${syntax}`),
+            ),
           ).toBe(true);
           expect(
             stats.compilation.fileDependencies.has(
-              path.resolve(`./test/${syntax}/error.${syntax}`)
-            )
+              path.resolve(`./test/${syntax}/error.${syntax}`),
+            ),
           ).toBe(true);
           expect(getWarnings(stats)).toMatchSnapshot("warnings");
           expect(getErrors(stats)).toMatchSnapshot("errors");
@@ -1357,9 +1357,9 @@ describe("loader", () => {
           expect(
             stats.compilation.fileDependencies.has(
               path.resolve(
-                `./test/${syntax}/error-file-not-found-use.${syntax}`
-              )
-            )
+                `./test/${syntax}/error-file-not-found-use.${syntax}`,
+              ),
+            ),
           ).toBe(true);
           expect(getWarnings(stats)).toMatchSnapshot("warnings");
           expect(getErrors(stats)).toMatchSnapshot("errors");
@@ -1377,9 +1377,9 @@ describe("loader", () => {
           expect(
             stats.compilation.fileDependencies.has(
               path.resolve(
-                `./test/${syntax}/error-file-not-found-use-2.${syntax}`
-              )
-            )
+                `./test/${syntax}/error-file-not-found-use-2.${syntax}`,
+              ),
+            ),
           ).toBe(true);
           expect(getWarnings(stats)).toMatchSnapshot("warnings");
           expect(getErrors(stats)).toMatchSnapshot("errors");
@@ -1477,7 +1477,7 @@ describe("loader", () => {
         it(`should work when "@use" at-rules without extensions and do not start with "_" ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
           const testId = getTestId(
             "use-without-extension-and-underscore",
-            syntax
+            syntax,
           );
           const options = {
             implementation,
@@ -1711,21 +1711,21 @@ describe("loader", () => {
                     __dirname,
                     syntax,
                     "another",
-                    `alias.${syntax}`
+                    `alias.${syntax}`,
                   ),
                   "@sass": path.resolve(
                     __dirname,
                     "sass",
                     "directory-6",
                     "file",
-                    "_index.sass"
+                    "_index.sass",
                   ),
                   "@scss": path.resolve(
                     __dirname,
                     "scss",
                     "directory-6",
                     "file",
-                    `_index.scss`
+                    `_index.scss`,
                   ),
                   "@path-to-scss-dir": path.resolve(__dirname, "scss"),
                   "@path-to-sass-dir": path.resolve(__dirname, "sass"),
@@ -1981,7 +1981,7 @@ describe("loader", () => {
           it(`should import .import.${syntax} files from a package ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
             const testId = getTestId(
               "import-index-import-from-package",
-              syntax
+              syntax,
             );
             const options = {
               implementation,
@@ -2080,10 +2080,10 @@ describe("loader", () => {
                     args: i.args.map((arg) =>
                       arg
                         .replace(url.pathToFileURL(__dirname), "file:///<cwd>")
-                        .replace(/\\/g, "/")
+                        .replace(/\\/g, "/"),
                     ),
                   };
-                })
+                }),
               );
             }
           }
diff --git a/test/manual/index.html b/test/manual/index.html
index 5488c3c7..92ad64d2 100644
--- a/test/manual/index.html
+++ b/test/manual/index.html
@@ -1,4 +1,4 @@
-<!DOCTYPE html>
+<!doctype html>
 <html>
   <head>
     <meta charset="utf-8" />
diff --git a/test/resolver.test.js b/test/resolver.test.js
index c399aeb4..2cd98ae6 100644
--- a/test/resolver.test.js
+++ b/test/resolver.test.js
@@ -20,7 +20,7 @@ describe("getWebpackResolver", () => {
 
   it("should resolve from passed `includePaths`", async () => {
     expect(await resolve("empty", [`${__dirname}/scss`])).toMatch(
-      /empty\.scss$/
+      /empty\.scss$/,
     );
   });
 
diff --git a/test/sassOptions-option.test.js b/test/sassOptions-option.test.js
index aa3dc1f6..5ca7de28 100644
--- a/test/sassOptions-option.test.js
+++ b/test/sassOptions-option.test.js
@@ -1,8 +1,6 @@
 import path from "path";
 
 import globImporter from "node-sass-glob-importer";
-import semver from "semver";
-import dartSass from "sass";
 
 import {
   compile,
@@ -212,7 +210,7 @@ describe("sassOptions option", () => {
         it(`should work with the "functions" option ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
           const testId = getTestId(
             api === "modern" ? "custom-functions-modern" : "custom-functions",
-            syntax
+            syntax,
           );
           const options = {
             implementation,
@@ -437,36 +435,6 @@ describe("sassOptions option", () => {
         });
       }
 
-      if (!isModernAPI) {
-        it(`should don't use the "fibers" package when the "fiber" option is "false" ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
-          const dartSassSpy = jest.spyOn(dartSass, "render");
-          const testId = getTestId("language", syntax);
-          const options = {
-            implementation,
-            api,
-            sassOptions: { fiber: false },
-          };
-          const compiler = getCompiler(testId, { loader: { options } });
-          const stats = await compile(compiler);
-          const codeFromBundle = getCodeFromBundle(stats, compiler);
-          const codeFromSass = await getCodeFromSass(testId, options);
-
-          if (
-            implementationName === "dart-sass" &&
-            semver.satisfies(process.version, ">= 10")
-          ) {
-            expect(dartSassSpy.mock.calls[0][0]).not.toHaveProperty("fiber");
-          }
-
-          expect(codeFromBundle.css).toBe(codeFromSass.css);
-          expect(codeFromBundle.css).toMatchSnapshot("css");
-          expect(getWarnings(stats)).toMatchSnapshot("warnings");
-          expect(getErrors(stats)).toMatchSnapshot("errors");
-
-          dartSassSpy.mockRestore();
-        });
-      }
-
       it(`should respect the "outputStyle"/"style" option ('${implementationName}', '${api}' API, '${syntax}' syntax)`, async () => {
         const testId = getTestId("language", syntax);
         const options = {
diff --git a/test/sourceMap-options.test.js b/test/sourceMap-options.test.js
index 468fe160..7453d56c 100644
--- a/test/sourceMap-options.test.js
+++ b/test/sourceMap-options.test.js
@@ -37,7 +37,7 @@ describe("sourceMap option", () => {
           expect(path.isAbsolute(source)).toBe(true);
           expect(source).toBe(path.normalize(source));
           expect(
-            fs.existsSync(path.resolve(sourceMap.sourceRoot, source))
+            fs.existsSync(path.resolve(sourceMap.sourceRoot, source)),
           ).toBe(true);
 
           return path
@@ -68,7 +68,7 @@ describe("sourceMap option", () => {
           expect(path.isAbsolute(source)).toBe(true);
           expect(source).toBe(path.normalize(source));
           expect(
-            fs.existsSync(path.resolve(sourceMap.sourceRoot, source))
+            fs.existsSync(path.resolve(sourceMap.sourceRoot, source)),
           ).toBe(true);
 
           return path
@@ -99,7 +99,7 @@ describe("sourceMap option", () => {
           expect(path.isAbsolute(source)).toBe(true);
           expect(source).toBe(path.normalize(source));
           expect(
-            fs.existsSync(path.resolve(sourceMap.sourceRoot, source))
+            fs.existsSync(path.resolve(sourceMap.sourceRoot, source)),
           ).toBe(true);
 
           return path
@@ -157,8 +157,8 @@ describe("sourceMap option", () => {
 
           expect(
             fs.existsSync(
-              path.resolve(__dirname, path.normalize(normalizedSource))
-            )
+              path.resolve(__dirname, path.normalize(normalizedSource)),
+            ),
           ).toBe(true);
 
           return path
diff --git a/test/warnRuleAsWarning.test.js b/test/warnRuleAsWarning.test.js
index 0623463a..6f758d12 100644
--- a/test/warnRuleAsWarning.test.js
+++ b/test/warnRuleAsWarning.test.js
@@ -42,10 +42,10 @@ describe("loader", () => {
                   args: i.args.map((arg) =>
                     arg
                       .replace(url.pathToFileURL(__dirname), "file:///<cwd>")
-                      .replace(/\\/g, "/")
+                      .replace(/\\/g, "/"),
                   ),
                 };
-              })
+              }),
             );
           }
         }
@@ -79,10 +79,10 @@ describe("loader", () => {
                   args: i.args.map((arg) =>
                     arg
                       .replace(url.pathToFileURL(__dirname), "file:///<cwd>")
-                      .replace(/\\/g, "/")
+                      .replace(/\\/g, "/"),
                   ),
                 };
-              })
+              }),
             );
           }
         }
@@ -116,10 +116,10 @@ describe("loader", () => {
                   args: i.args.map((arg) =>
                     arg
                       .replace(url.pathToFileURL(__dirname), "file:///<cwd>")
-                      .replace(/\\/g, "/")
+                      .replace(/\\/g, "/"),
                   ),
                 };
-              })
+              }),
             );
           }
         }
@@ -152,10 +152,10 @@ describe("loader", () => {
                     args: i.args.map((arg) =>
                       arg
                         .replace(url.pathToFileURL(__dirname), "file:///<cwd>")
-                        .replace(/\\/g, "/")
+                        .replace(/\\/g, "/"),
                     ),
                   };
-                })
+                }),
               );
             }
           }