diff --git a/core/modules/ckeditor/src/Tests/CKEditorTest.php b/core/modules/ckeditor/src/Tests/CKEditorTest.php
index f842862..30546d9 100644
--- a/core/modules/ckeditor/src/Tests/CKEditorTest.php
+++ b/core/modules/ckeditor/src/Tests/CKEditorTest.php
@@ -261,6 +261,7 @@ function testBuildContentsCssJSSetting() {
     $expected[] = file_create_url('core/themes/bartik/css/base/elements.css');
     $expected[] = file_create_url('core/themes/bartik/css/components/captions.css');
     $expected[] = file_create_url('core/themes/bartik/css/components/table.css');
+    $expected[] = file_create_url('core/themes/bartik/css/components/text-formatted.css');
     $this->assertIdentical($expected, $this->ckeditor->buildContentsCssJSSetting($editor), '"contentsCss" configuration part of JS settings built correctly while a theme providing a CKEditor stylesheet exists.');
   }