commit 97008e1f9008ed1d4c5eab42de42e68810bb6219
Author: Lee Rowlands <lee.rowlands@previousnext.com.au>
Date:   Fri May 2 17:12:32 2014 +1000

    Fail

diff --git a/core/modules/system/tests/modules/ajax_test/ajax_test.module b/core/modules/system/tests/modules/ajax_test/ajax_test.module
index 356f7d6..eee24f3 100644
--- a/core/modules/system/tests/modules/ajax_test/ajax_test.module
+++ b/core/modules/system/tests/modules/ajax_test/ajax_test.module
@@ -95,6 +95,7 @@ function ajax_test_error() {
 function ajax_test_dialog_contents() {
   // This is a regular render array; the keys do not have special meaning.
   $content = array(
+    '#title' => 'AJAX Dialog contents',
     'content' => array(
       '#markup' => 'Example message',
     ),
diff --git a/core/modules/system/tests/modules/ajax_test/ajax_test.routing.yml b/core/modules/system/tests/modules/ajax_test/ajax_test.routing.yml
index 8be4f0a..e3c7cf5 100644
--- a/core/modules/system/tests/modules/ajax_test/ajax_test.routing.yml
+++ b/core/modules/system/tests/modules/ajax_test/ajax_test.routing.yml
@@ -1,7 +1,7 @@
 ajax_test.dialog_contents:
   path: '/ajax-test/dialog-contents'
   defaults:
-    _title: 'AJAX Dialog contents'
+    _title: 'AJAX Dialog contents routing'
     _content: '\Drupal\ajax_test\Controller\AjaxTestController::dialogContents'
   requirements:
     _access: 'TRUE'