diff --git a/src/index.js b/src/index.js
index 9a1b17de..24573504 100644
--- a/src/index.js
+++ b/src/index.js
@@ -821,8 +821,7 @@ class MiniCssExtractPlugin {
               return referencedChunk.canBeInitial()
                 ? this.options.filename
                 : this.options.chunkFilename;
-            },
-            true
+            }
           )
         );
 
diff --git a/test/TestCases.test.js b/test/TestCases.test.js
index 5e13f10f..2374a9c2 100644
--- a/test/TestCases.test.js
+++ b/test/TestCases.test.js
@@ -114,7 +114,7 @@ describe("TestCases", () => {
           Object.assign(
             config,
             {
-              mode: "none",
+              mode: config.mode || "none",
               context: directoryForCase,
             },
             config,
diff --git a/test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/0.b39c6cd65ee4f78b425e.css b/test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/0.28af1b92f2511f8f1836.css
similarity index 100%
rename from test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/0.b39c6cd65ee4f78b425e.css
rename to test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/0.28af1b92f2511f8f1836.css
diff --git a/test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/b39c6cd65ee4f78b425e.css b/test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/28af1b92f2511f8f1836.css
similarity index 100%
rename from test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/b39c6cd65ee4f78b425e.css
rename to test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/28af1b92f2511f8f1836.css
diff --git a/test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/main.js b/test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/main.js
index 8d3281d3..6ac47305 100644
--- a/test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/main.js
+++ b/test/cases/chunkFilename-fullhash/expected/webpack-5-importModule/main.js
@@ -64,10 +64,8 @@ __webpack_require__.r(__webpack_exports__);
 /******/ 	
 /******/ 	/* webpack/runtime/get mini-css chunk filename */
 /******/ 	(() => {
-/******/ 		// This function allow to reference all chunks
+/******/ 		// This function allow to reference async chunks
 /******/ 		__webpack_require__.miniCssF = (chunkId) => {
-/******/ 			// return url for filenames not based on template
-/******/ 			if (chunkId === 1) return "" + __webpack_require__.h() + ".css";
 /******/ 			// return url for filenames based on template
 /******/ 			return "" + chunkId + "." + __webpack_require__.h() + ".css";
 /******/ 		};
@@ -75,7 +73,7 @@ __webpack_require__.r(__webpack_exports__);
 /******/ 	
 /******/ 	/* webpack/runtime/getFullHash */
 /******/ 	(() => {
-/******/ 		__webpack_require__.h = () => ("b39c6cd65ee4f78b425e")
+/******/ 		__webpack_require__.h = () => ("28af1b92f2511f8f1836")
 /******/ 	})();
 /******/ 	
 /******/ 	/* webpack/runtime/global */
diff --git a/test/cases/chunkFilename-fullhash/expected/webpack-5/0.4119f46f7fa72336b928.css b/test/cases/chunkFilename-fullhash/expected/webpack-5/0.845a2495b51038b0d047.css
similarity index 100%
rename from test/cases/chunkFilename-fullhash/expected/webpack-5/0.4119f46f7fa72336b928.css
rename to test/cases/chunkFilename-fullhash/expected/webpack-5/0.845a2495b51038b0d047.css
diff --git a/test/cases/chunkFilename-fullhash/expected/webpack-5/4119f46f7fa72336b928.css b/test/cases/chunkFilename-fullhash/expected/webpack-5/845a2495b51038b0d047.css
similarity index 100%
rename from test/cases/chunkFilename-fullhash/expected/webpack-5/4119f46f7fa72336b928.css
rename to test/cases/chunkFilename-fullhash/expected/webpack-5/845a2495b51038b0d047.css
diff --git a/test/cases/chunkFilename-fullhash/expected/webpack-5/main.js b/test/cases/chunkFilename-fullhash/expected/webpack-5/main.js
index 9c87a9f7..84394021 100644
--- a/test/cases/chunkFilename-fullhash/expected/webpack-5/main.js
+++ b/test/cases/chunkFilename-fullhash/expected/webpack-5/main.js
@@ -64,10 +64,8 @@ __webpack_require__.r(__webpack_exports__);
 /******/ 	
 /******/ 	/* webpack/runtime/get mini-css chunk filename */
 /******/ 	(() => {
-/******/ 		// This function allow to reference all chunks
+/******/ 		// This function allow to reference async chunks
 /******/ 		__webpack_require__.miniCssF = (chunkId) => {
-/******/ 			// return url for filenames not based on template
-/******/ 			if (chunkId === 1) return "" + __webpack_require__.h() + ".css";
 /******/ 			// return url for filenames based on template
 /******/ 			return "" + chunkId + "." + __webpack_require__.h() + ".css";
 /******/ 		};
@@ -75,7 +73,7 @@ __webpack_require__.r(__webpack_exports__);
 /******/ 	
 /******/ 	/* webpack/runtime/getFullHash */
 /******/ 	(() => {
-/******/ 		__webpack_require__.h = () => ("4119f46f7fa72336b928")
+/******/ 		__webpack_require__.h = () => ("845a2495b51038b0d047")
 /******/ 	})();
 /******/ 	
 /******/ 	/* webpack/runtime/global */
diff --git a/test/cases/contenthash-1/expected/main.8c5b220bf6f482881a90.css b/test/cases/contenthash-1/expected/main.8c5b220bf6f482881a90.css
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/test/cases/contenthash-1/expected/main.8c5b220bf6f482881a90.css
@@ -0,0 +1 @@
+
diff --git a/test/cases/contenthash-1/index.js b/test/cases/contenthash-1/index.js
new file mode 100644
index 00000000..95594dc5
--- /dev/null
+++ b/test/cases/contenthash-1/index.js
@@ -0,0 +1,3 @@
+/* eslint-disable */
+async () => await import("./lib.js");
+import "./style.css";
diff --git a/test/cases/contenthash-1/lib.js b/test/cases/contenthash-1/lib.js
new file mode 100644
index 00000000..e69de29b
diff --git a/test/cases/contenthash-1/style.css b/test/cases/contenthash-1/style.css
new file mode 100644
index 00000000..e69de29b
diff --git a/test/cases/contenthash-1/webpack.config.js b/test/cases/contenthash-1/webpack.config.js
new file mode 100644
index 00000000..5b1b9ce4
--- /dev/null
+++ b/test/cases/contenthash-1/webpack.config.js
@@ -0,0 +1,25 @@
+import Self from "../../../src";
+
+module.exports = {
+  entry: "./index.js",
+  mode: "production",
+  cache: {
+    type: "filesystem",
+  },
+  module: {
+    rules: [
+      {
+        test: /\.css$/,
+        use: [Self.loader, "css-loader"],
+      },
+    ],
+  },
+  output: {
+    filename: "[name].[contenthash].js",
+  },
+  plugins: [
+    new Self({
+      filename: "[name].[contenthash].css",
+    }),
+  ],
+};
diff --git a/test/cases/hmr/expected/main.css b/test/cases/hmr/expected/main.css
index 6f77cc07..729f48f8 100644
--- a/test/cases/hmr/expected/main.css
+++ b/test/cases/hmr/expected/main.css
@@ -1,9 +1,21 @@
+/*!****************************************************************!*\
+  !*** css ../../../node_modules/css-loader/dist/cjs.js!./c.css ***!
+  \****************************************************************/
 @import url(https://some/other/external/css);
+/*!****************************************************************!*\
+  !*** css ../../../node_modules/css-loader/dist/cjs.js!./b.css ***!
+  \****************************************************************/
 @import url(https://some/external/css);
+/*!****************************************************************!*\
+  !*** css ../../../node_modules/css-loader/dist/cjs.js!./a.css ***!
+  \****************************************************************/
 body {
   background: red;
 }
 
+/*!********************************************************************!*\
+  !*** css ../../../node_modules/css-loader/dist/cjs.js!./c.css (1) ***!
+  \********************************************************************/
 .c {
   background: red;
 }
@@ -12,6 +24,9 @@ body {
   color: yellow;
 }
 
+/*!********************************************************************!*\
+  !*** css ../../../node_modules/css-loader/dist/cjs.js!./b.css (1) ***!
+  \********************************************************************/
 .b {
   background: red;
 }
@@ -20,5 +35,8 @@ body {
   color: yellow;
 }
 
+/*!********************************************************************!*\
+  !*** css ../../../node_modules/css-loader/dist/cjs.js!./index.css ***!
+  \********************************************************************/
 
 
diff --git a/test/cases/hmr/expected/main.js b/test/cases/hmr/expected/main.js
index 31721465..9b64a55d 100644
--- a/test/cases/hmr/expected/main.js
+++ b/test/cases/hmr/expected/main.js
@@ -1,22 +1,10 @@
 /******/ (() => { // webpackBootstrap
-/******/ 	var __webpack_modules__ = ([
-/* 0 */
-/***/ ((module, __webpack_exports__, __webpack_require__) => {
-
-"use strict";
-__webpack_require__.r(__webpack_exports__);
-// extracted by mini-css-extract-plugin
-
-    if(true) {
-      // 
-      var cssReload = __webpack_require__(1)(module.id, {"locals":false});
-      module.hot.dispose(cssReload);
-      module.hot.accept(undefined, cssReload);
-    }
-  
+/******/ 	var __webpack_modules__ = ({
 
-/***/ }),
-/* 1 */
+/***/ "../../../src/hmr/hotModuleReplacement.js":
+/*!************************************************!*\
+  !*** ../../../src/hmr/hotModuleReplacement.js ***!
+  \************************************************/
 /***/ ((module, __unused_webpack_exports, __webpack_require__) => {
 
 /* eslint-env browser */
@@ -26,7 +14,7 @@ __webpack_require__.r(__webpack_exports__);
   func-names
 */
 
-const normalizeUrl = __webpack_require__(2);
+const normalizeUrl = __webpack_require__(/*! ./normalize-url */ "../../../src/hmr/normalize-url.js");
 
 const srcByModuleId = Object.create(null);
 
@@ -262,7 +250,11 @@ module.exports = function (moduleId, options) {
 
 
 /***/ }),
-/* 2 */
+
+/***/ "../../../src/hmr/normalize-url.js":
+/*!*****************************************!*\
+  !*** ../../../src/hmr/normalize-url.js ***!
+  \*****************************************/
 /***/ ((module) => {
 
 /* eslint-disable */
@@ -305,8 +297,29 @@ module.exports = function (urlString) {
 };
 
 
+/***/ }),
+
+/***/ "./index.css":
+/*!*******************!*\
+  !*** ./index.css ***!
+  \*******************/
+/***/ ((module, __webpack_exports__, __webpack_require__) => {
+
+"use strict";
+__webpack_require__.r(__webpack_exports__);
+// extracted by mini-css-extract-plugin
+
+    if(true) {
+      // 
+      var cssReload = __webpack_require__(/*! ../../../src/hmr/hotModuleReplacement.js */ "../../../src/hmr/hotModuleReplacement.js")(module.id, {"locals":false});
+      module.hot.dispose(cssReload);
+      module.hot.accept(undefined, cssReload);
+    }
+  
+
 /***/ })
-/******/ 	]);
+
+/******/ 	});
 /************************************************************************/
 /******/ 	// The module cache
 /******/ 	var __webpack_module_cache__ = {};
@@ -362,10 +375,10 @@ module.exports = function (urlString) {
 /******/ 	
 /******/ 	/* webpack/runtime/get mini-css chunk filename */
 /******/ 	(() => {
-/******/ 		// This function allow to reference all chunks
+/******/ 		// This function allow to reference async chunks
 /******/ 		__webpack_require__.miniCssF = (chunkId) => {
 /******/ 			// return url for filenames based on template
-/******/ 			return "" + "main" + ".css";
+/******/ 			return undefined;
 /******/ 		};
 /******/ 	})();
 /******/ 	
@@ -947,7 +960,7 @@ module.exports = function (urlString) {
 /******/ 		// undefined = chunk not loaded, null = chunk preloaded/prefetched
 /******/ 		// [resolve, reject, Promise] = chunk loading, 0 = chunk loaded
 /******/ 		var installedChunks = __webpack_require__.hmrS_jsonp = __webpack_require__.hmrS_jsonp || {
-/******/ 			0: 0
+/******/ 			"main": 0
 /******/ 		};
 /******/ 		
 /******/ 		// no chunk on demand loading
@@ -1457,7 +1470,7 @@ module.exports = function (urlString) {
 /******/ 	// module cache are used so entry inlining is disabled
 /******/ 	// startup
 /******/ 	// Load entry module and return exports
-/******/ 	var __webpack_exports__ = __webpack_require__(0);
+/******/ 	var __webpack_exports__ = __webpack_require__("./index.css");
 /******/ 	
 /******/ })()
 ;
\ No newline at end of file
diff --git a/test/cases/hmr/webpack.config.js b/test/cases/hmr/webpack.config.js
index fbbe0159..6b0e2569 100644
--- a/test/cases/hmr/webpack.config.js
+++ b/test/cases/hmr/webpack.config.js
@@ -5,6 +5,7 @@ import Self from "../../../src";
 module.exports = {
   entry: "./index.css",
   mode: "development",
+  devtool: false,
   module: {
     rules: [
       {
diff --git a/test/cases/insert-function/expected/main.js b/test/cases/insert-function/expected/main.js
index b47b5465..aed43764 100644
--- a/test/cases/insert-function/expected/main.js
+++ b/test/cases/insert-function/expected/main.js
@@ -53,7 +53,7 @@
 /******/ 	
 /******/ 	/* webpack/runtime/get mini-css chunk filename */
 /******/ 	(() => {
-/******/ 		// This function allow to reference all chunks
+/******/ 		// This function allow to reference async chunks
 /******/ 		__webpack_require__.miniCssF = (chunkId) => {
 /******/ 			// return url for filenames based on template
 /******/ 			return "" + chunkId + ".css";
diff --git a/test/cases/insert-string/expected/main.js b/test/cases/insert-string/expected/main.js
index bcd051c5..8251e336 100644
--- a/test/cases/insert-string/expected/main.js
+++ b/test/cases/insert-string/expected/main.js
@@ -53,7 +53,7 @@
 /******/ 	
 /******/ 	/* webpack/runtime/get mini-css chunk filename */
 /******/ 	(() => {
-/******/ 		// This function allow to reference all chunks
+/******/ 		// This function allow to reference async chunks
 /******/ 		__webpack_require__.miniCssF = (chunkId) => {
 /******/ 			// return url for filenames based on template
 /******/ 			return "" + chunkId + ".css";
diff --git a/test/cases/insert-undefined/expected/main.js b/test/cases/insert-undefined/expected/main.js
index 04dc7411..78577d39 100644
--- a/test/cases/insert-undefined/expected/main.js
+++ b/test/cases/insert-undefined/expected/main.js
@@ -53,7 +53,7 @@
 /******/ 	
 /******/ 	/* webpack/runtime/get mini-css chunk filename */
 /******/ 	(() => {
-/******/ 		// This function allow to reference all chunks
+/******/ 		// This function allow to reference async chunks
 /******/ 		__webpack_require__.miniCssF = (chunkId) => {
 /******/ 			// return url for filenames based on template
 /******/ 			return "" + chunkId + ".css";
diff --git a/test/cases/runtime/expected/runtime~main.js b/test/cases/runtime/expected/runtime~main.js
index 0f260b11..fda12e3f 100644
--- a/test/cases/runtime/expected/runtime~main.js
+++ b/test/cases/runtime/expected/runtime~main.js
@@ -128,10 +128,10 @@
 /******/ 	
 /******/ 	/* webpack/runtime/get mini-css chunk filename */
 /******/ 	(() => {
-/******/ 		// This function allow to reference all chunks
+/******/ 		// This function allow to reference async chunks
 /******/ 		__webpack_require__.miniCssF = (chunkId) => {
 /******/ 			// return url for filenames based on template
-/******/ 			return "" + "main" + "." + "a45a4571ab5cece12cf0" + ".css";
+/******/ 			return undefined;
 /******/ 		};
 /******/ 	})();
 /******/