diff --git a/test/cases/composes-async/expected/2.css b/test/cases/composes-async/expected/async-1.css
similarity index 100%
rename from test/cases/composes-async/expected/2.css
rename to test/cases/composes-async/expected/async-1.css
diff --git a/test/cases/composes-async/expected/1.css b/test/cases/composes-async/expected/dedupe.css
similarity index 100%
rename from test/cases/composes-async/expected/1.css
rename to test/cases/composes-async/expected/dedupe.css
diff --git a/test/cases/composes-async/index.js b/test/cases/composes-async/index.js
index b9f79b90..8c683998 100644
--- a/test/cases/composes-async/index.js
+++ b/test/cases/composes-async/index.js
@@ -1,2 +1,2 @@
-import('./async-1.css');
-import('./async-2.css');
+import(/* webpackChunkName: "async-1" */ './async-1.css');
+import(/* webpackChunkName: "async-2" */ './async-2.css');
diff --git a/test/cases/composes-async/webpack.config.js b/test/cases/composes-async/webpack.config.js
index 292fe297..828d8b52 100644
--- a/test/cases/composes-async/webpack.config.js
+++ b/test/cases/composes-async/webpack.config.js
@@ -25,6 +25,7 @@ module.exports = {
       cacheGroups: {
         cssDedupe: {
           test: /\.css$/,
+          name: 'dedupe',
           chunks: 'all',
           minChunks: 2,
           enforce: true,