core/modules/ckeditor/src/Plugin/Editor/CKEditor.php | 2 +-
 core/modules/ckeditor/src/Tests/CKEditorTest.php     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php b/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php
index d5bd0b9..798d0c4 100644
--- a/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php
+++ b/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php
@@ -414,7 +414,7 @@ public function buildToolbarJSSetting(EditorEntity $editor) {
   public function buildContentsCssJSSetting(EditorEntity $editor) {
     $css = array(
       drupal_get_path('module', 'ckeditor') . '/css/ckeditor-iframe.css',
-      drupal_get_path('module', 'system') . '/css/system.module.css',
+      drupal_get_path('module', 'system') . '/css/components/align.module.css',
     );
     $this->moduleHandler->alter('ckeditor_css', $css, $editor);
     $css = array_merge($css, _ckeditor_theme_css());
diff --git a/core/modules/ckeditor/src/Tests/CKEditorTest.php b/core/modules/ckeditor/src/Tests/CKEditorTest.php
index a07789f..a390ce9 100644
--- a/core/modules/ckeditor/src/Tests/CKEditorTest.php
+++ b/core/modules/ckeditor/src/Tests/CKEditorTest.php
@@ -477,7 +477,7 @@ protected function getDefaultToolbarConfig() {
   protected function getDefaultContentsCssConfig() {
     return array(
       file_create_url('core/modules/ckeditor/css/ckeditor-iframe.css'),
-      file_create_url('core/modules/system/css/system.module.css'),
+      file_create_url('core/modules/system/css/components/align.module.css'),
     );
   }