diff --git a/core/modules/system/src/Tests/System/FrontPageTest.php b/core/modules/system/src/Tests/System/FrontPageTest.php
index 88235b3..e5527d9 100644
--- a/core/modules/system/src/Tests/System/FrontPageTest.php
+++ b/core/modules/system/src/Tests/System/FrontPageTest.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\system\Tests\System;
 
+use Drupal\Component\Utility\SafeMarkup;
 use Drupal\simpletest\WebTestBase;
 
 /**