diff --git a/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php b/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php
index aab6e46..9279b0d 100644
--- a/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php
+++ b/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php
@@ -7,8 +7,8 @@
 
 namespace Drupal\ajax_test\Controller;
 
-use Drupal\Core\Ajax\AlertCommand;
 use Drupal\Core\Ajax\AjaxResponse;
+use Drupal\Core\Ajax\AlertCommand;
 use Drupal\Core\Ajax\CloseDialogCommand;
 use Drupal\Core\Ajax\HtmlCommand;
 use Drupal\Core\Url;
@@ -85,6 +85,9 @@ public function order() {
   /**
    * Menu callback: Returns AJAX element with #error property set.
    *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The current request object.
+   *
    * @return \Drupal\Core\Ajax\AjaxResponse
    *   The JSON response object.
    */