diff --git a/core/modules/system/tests/modules/module_test/module_test.implementations.inc b/core/modules/system/tests/modules/module_test/module_test.implementations.inc
index 63c866ea1b1254aed927e6aa2403cbe363734ac4..a21f7cafebb3084fe124e0d53fb8571af17e0d7b 100644
--- a/core/modules/system/tests/modules/module_test/module_test.implementations.inc
+++ b/core/modules/system/tests/modules/module_test/module_test.implementations.inc
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Implements hook_altered_test_hook()
+ * Implements hook_altered_test_hook().
  *
  * @see module_test_module_implements_alter()
  */