diff --git a/core/modules/user/lib/Drupal/user/Tests/UserCreateFailMailTest.php b/core/modules/user/lib/Drupal/user/Tests/UserCreateFailMailTest.php
index a8b2a98..b34ca7a 100644
--- a/core/modules/user/lib/Drupal/user/Tests/UserCreateFailMailTest.php
+++ b/core/modules/user/lib/Drupal/user/Tests/UserCreateFailMailTest.php
@@ -14,7 +14,9 @@
  */
 class UserCreateFailMailTest extends WebTestBase {
 
-  // Enable user_mail_failure_test module.
+  /**
+   * Enable the user_mail_failure_test module.
+   */
   public static $modules = array('user_mail_failure_test');
 
   public static function getInfo() {