diff --git a/core/modules/system/src/Tests/Form/ValidationTest.php b/core/modules/system/src/Tests/Form/ValidationTest.php
index 80d95c9..838703a 100644
--- a/core/modules/system/src/Tests/Form/ValidationTest.php
+++ b/core/modules/system/src/Tests/Form/ValidationTest.php
@@ -8,6 +8,7 @@
 namespace Drupal\system\Tests\Form;
 
 use Drupal\Core\Render\Element;
+use Drupal\Core\Url;
 use Drupal\simpletest\WebTestBase;
 
 /**