diff --git a/.babelrc b/.babelrc
index 11e1c3be..52db72d8 100644
--- a/.babelrc
+++ b/.babelrc
@@ -27,9 +27,10 @@
       "presets": [
         "env"
       ],
+      "sourceMap" : "inline",
       "plugins": [
         "transform-object-rest-spread"
       ]
     }
   }
-}
\ No newline at end of file
+}
diff --git a/src/index.js b/src/index.js
index 2bc8b28d..57dc84ff 100644
--- a/src/index.js
+++ b/src/index.js
@@ -144,7 +144,6 @@ class ExtractTextPlugin {
         async.forEach(chunks, (chunk, callback) => { // eslint-disable-line no-shadow
           const extractedChunk = extractedChunks[chunks.indexOf(chunk)];
           const shouldExtract = !!(options.allChunks || isInitialOrHasNoParents(chunk));
-          chunk.sortModules(module);
           async.forEach(chunk.mapModules(c => c), (module, callback) => { // eslint-disable-line no-shadow
             let meta = module[NS];
             if (meta && (!meta.options.id || meta.options.id === id)) {
@@ -194,7 +193,8 @@ class ExtractTextPlugin {
       compilation.plugin('additional-assets', (callback) => {
         extractedChunks.forEach((extractedChunk) => {
           if (extractedChunk.getNumberOfModules()) {
-            extractedChunk.modules.sort((a, b) => {
+            extractedChunk.sortModules((a, b) => {
+            // extractedChunk.modules.sort((a, b) => {
               if (!options.ignoreOrder && isInvalidOrder(a, b)) {
                 compilation.errors.push(new OrderUndefinedError(a.getOriginalModule()));
                 compilation.errors.push(new OrderUndefinedError(b.getOriginalModule()));
diff --git a/test/__snapshots__/webpack-integration.test.js.snap b/test/__snapshots__/webpack-integration.test.js.snap
index 05b25321..d5b5a1b7 100644
--- a/test/__snapshots__/webpack-integration.test.js.snap
+++ b/test/__snapshots__/webpack-integration.test.js.snap
@@ -2,10 +2,10 @@
 
 exports[`Webpack Integration Tests chunk-modules-css-wrong-order 1`] = `
 ".block {
-	color: tomato;
+  font-size: 16px;
 }
 .App {
-	color: black;
+  text-align: center;
 }
 "
 `;
diff --git a/test/cases/chunk-modules-css-wrong-order/expected/file.css b/test/cases/chunk-modules-css-wrong-order/expected/file.css
index 83b0a191..e4ea19ae 100644
--- a/test/cases/chunk-modules-css-wrong-order/expected/file.css
+++ b/test/cases/chunk-modules-css-wrong-order/expected/file.css
@@ -4,4 +4,3 @@
 .App {
   text-align: center;
 }
-