diff --git a/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module b/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module
index a8fd7e4..175d593 100644
--- a/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module
+++ b/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module
@@ -84,6 +84,7 @@ function ajax_forms_test_simple_form($form, &$form_state) {
   foreach ($invalid_callbacks as $key => $value) {
     $form['select_' . $key . '_callback'] = array(
       '#type' => 'select',
+      '#title' => t('Test %key callbacks', array('%key' => $key)),
       '#options' => array('red' => 'red'),
       '#ajax' => array('callback' => $value),
     );