diff --git a/src/index.js b/src/index.js
index 6039de07..cda0bf07 100644
--- a/src/index.js
+++ b/src/index.js
@@ -11,7 +11,7 @@ import schema from './plugin-options.json';
 import { MODULE_TYPE, compareModulesByIdentifier } from './utils';
 
 // webpack 5 exposes the sources property to ensure the right version of webpack-sources is used
-const { ConcatSource, SourceMapSource, OriginalSource } =
+const { ConcatSource, SourceMapSource, RawSource } =
   // eslint-disable-next-line global-require
   webpack.sources || require('webpack-sources');
 
@@ -688,7 +688,7 @@ class MiniCssExtractPlugin {
           );
         } else {
           source.add(
-            new OriginalSource(content, m.readableIdentifier(requestShortener))
+            new RawSource(content, m.readableIdentifier(requestShortener))
           );
         }
         source.add('\n');
diff --git a/test/cases/devtool-source-map-no-source-maps-from-css-loader/expected/main.css b/test/cases/devtool-source-map-from-loaders/expected/webpack-4/main.css
similarity index 100%
rename from test/cases/devtool-source-map-no-source-maps-from-css-loader/expected/main.css
rename to test/cases/devtool-source-map-from-loaders/expected/webpack-4/main.css
diff --git a/test/cases/devtool-source-map-from-loaders/expected/webpack-4/main.css.map b/test/cases/devtool-source-map-from-loaders/expected/webpack-4/main.css.map
new file mode 100644
index 00000000..bb767168
--- /dev/null
+++ b/test/cases/devtool-source-map-from-loaders/expected/webpack-4/main.css.map
@@ -0,0 +1 @@
+{"version":3,"sources":["webpack:///./style.css"],"names":[],"mappings":"AAAA;EACE,eAAe;AACjB","file":"main.css","sourcesContent":["body {\n  background: red;\n}\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/test/cases/devtool-source-map-from-loaders/expected/webpack-5/main.css b/test/cases/devtool-source-map-from-loaders/expected/webpack-5/main.css
new file mode 100644
index 00000000..8f8cf968
--- /dev/null
+++ b/test/cases/devtool-source-map-from-loaders/expected/webpack-5/main.css
@@ -0,0 +1,6 @@
+body {
+  background: red;
+}
+
+
+/*# sourceMappingURL=main.css.map*/
\ No newline at end of file
diff --git a/test/cases/devtool-source-map-from-loaders/expected/webpack-5/main.css.map b/test/cases/devtool-source-map-from-loaders/expected/webpack-5/main.css.map
new file mode 100644
index 00000000..bb767168
--- /dev/null
+++ b/test/cases/devtool-source-map-from-loaders/expected/webpack-5/main.css.map
@@ -0,0 +1 @@
+{"version":3,"sources":["webpack:///./style.css"],"names":[],"mappings":"AAAA;EACE,eAAe;AACjB","file":"main.css","sourcesContent":["body {\n  background: red;\n}\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/test/cases/devtool-source-map-no-source-maps-from-css-loader/index.js b/test/cases/devtool-source-map-from-loaders/index.js
similarity index 100%
rename from test/cases/devtool-source-map-no-source-maps-from-css-loader/index.js
rename to test/cases/devtool-source-map-from-loaders/index.js
diff --git a/test/cases/devtool-source-map-no-source-maps-from-css-loader/style.css b/test/cases/devtool-source-map-from-loaders/style.css
similarity index 100%
rename from test/cases/devtool-source-map-no-source-maps-from-css-loader/style.css
rename to test/cases/devtool-source-map-from-loaders/style.css
diff --git a/test/cases/devtool-source-map-from-loaders/webpack.config.js b/test/cases/devtool-source-map-from-loaders/webpack.config.js
new file mode 100644
index 00000000..c9443105
--- /dev/null
+++ b/test/cases/devtool-source-map-from-loaders/webpack.config.js
@@ -0,0 +1,27 @@
+import Self from '../../../src';
+
+module.exports = {
+  entry: './index.js',
+  devtool: 'source-map',
+  module: {
+    rules: [
+      {
+        test: /\.css$/,
+        use: [
+          Self.loader,
+          {
+            loader: 'css-loader',
+            options: {
+              sourceMap: true,
+            },
+          },
+        ],
+      },
+    ],
+  },
+  plugins: [
+    new Self({
+      filename: '[name].css',
+    }),
+  ],
+};
diff --git a/test/cases/devtool-source-map-no-source-maps-from-css-loader/expected/main.css.map b/test/cases/devtool-source-map-no-source-maps-from-css-loader/expected/main.css.map
deleted file mode 100644
index 5acba1b7..00000000
--- a/test/cases/devtool-source-map-no-source-maps-from-css-loader/expected/main.css.map
+++ /dev/null
@@ -1 +0,0 @@
-{"version":3,"sources":["webpack:///./style.css"],"names":[],"mappings":"AAAA;AACA;AACA","file":"main.css","sourcesContent":["body {\n  background: red;\n}\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/test/cases/devtool-source-map-no-source-maps-from-loaders/expected/webpack-4/main.css b/test/cases/devtool-source-map-no-source-maps-from-loaders/expected/webpack-4/main.css
new file mode 100644
index 00000000..8f8cf968
--- /dev/null
+++ b/test/cases/devtool-source-map-no-source-maps-from-loaders/expected/webpack-4/main.css
@@ -0,0 +1,6 @@
+body {
+  background: red;
+}
+
+
+/*# sourceMappingURL=main.css.map*/
\ No newline at end of file
diff --git a/test/cases/devtool-source-map-no-source-maps-from-loaders/expected/webpack-4/main.css.map b/test/cases/devtool-source-map-no-source-maps-from-loaders/expected/webpack-4/main.css.map
new file mode 100644
index 00000000..b350621d
--- /dev/null
+++ b/test/cases/devtool-source-map-no-source-maps-from-loaders/expected/webpack-4/main.css.map
@@ -0,0 +1 @@
+{"version":3,"sources":[],"names":[],"mappings":"","file":"main.css","sourceRoot":""}
\ No newline at end of file
diff --git a/test/cases/devtool-source-map-no-source-maps-from-loaders/expected/webpack-5/main.css b/test/cases/devtool-source-map-no-source-maps-from-loaders/expected/webpack-5/main.css
new file mode 100644
index 00000000..cebc5c1c
--- /dev/null
+++ b/test/cases/devtool-source-map-no-source-maps-from-loaders/expected/webpack-5/main.css
@@ -0,0 +1,4 @@
+body {
+  background: red;
+}
+
diff --git a/test/cases/devtool-source-map-no-source-maps-from-loaders/index.js b/test/cases/devtool-source-map-no-source-maps-from-loaders/index.js
new file mode 100644
index 00000000..aa3357bf
--- /dev/null
+++ b/test/cases/devtool-source-map-no-source-maps-from-loaders/index.js
@@ -0,0 +1 @@
+import './style.css';
diff --git a/test/cases/devtool-source-map-no-source-maps-from-loaders/style.css b/test/cases/devtool-source-map-no-source-maps-from-loaders/style.css
new file mode 100644
index 00000000..67ce83e4
--- /dev/null
+++ b/test/cases/devtool-source-map-no-source-maps-from-loaders/style.css
@@ -0,0 +1,3 @@
+body {
+  background: red;
+}
diff --git a/test/cases/devtool-source-map-no-source-maps-from-css-loader/webpack.config.js b/test/cases/devtool-source-map-no-source-maps-from-loaders/webpack.config.js
similarity index 100%
rename from test/cases/devtool-source-map-no-source-maps-from-css-loader/webpack.config.js
rename to test/cases/devtool-source-map-no-source-maps-from-loaders/webpack.config.js