diff --git a/core/modules/simpletest/tests/form_test.module b/core/modules/simpletest/tests/form_test.module
index 4c75b31..03e0cad 100644
--- a/core/modules/simpletest/tests/form_test.module
+++ b/core/modules/simpletest/tests/form_test.module
@@ -1374,6 +1374,7 @@ function _form_test_disabled_elements($form, &$form_state) {
     '#disabled' => TRUE,
   );
 
+  // Number.
   $form['number'] = array(
     '#type' => 'number',
     '#title' => 'number',