diff --git c/core/modules/system/tests/modules/test_page_test/lib/Drupal/test_page_test/Controller/Test.php w/core/modules/system/tests/modules/test_page_test/lib/Drupal/test_page_test/Controller/Test.php
index d5032e7..c2a1f10 100644
--- c/core/modules/system/tests/modules/test_page_test/lib/Drupal/test_page_test/Controller/Test.php
+++ w/core/modules/system/tests/modules/test_page_test/lib/Drupal/test_page_test/Controller/Test.php
@@ -29,6 +29,8 @@ public function renderTitle() {
   /**
    * Renders a test page.
    *
+   * @return array
+   *   A render array as expected by drupal_render()
    */
   public function testPage() {
     $build = array();
diff --git c/core/modules/system/tests/modules/test_page_test/test_page_test.module w/core/modules/system/tests/modules/test_page_test/test_page_test.module
index 96fc52b..b3d9bbc 100644
--- c/core/modules/system/tests/modules/test_page_test/test_page_test.module
+++ w/core/modules/system/tests/modules/test_page_test/test_page_test.module
@@ -1,9 +1 @@
 <?php
-function test_page_test_menu() {
-  $items['test-page'] = array(
-    'title' => 'Test front page',
-    'route_name' => 'test_page_test_page',
-    'type' => MENU_CALLBACK,
-  );
-  return $items;
-}
diff --git c/core/modules/system/tests/modules/test_page_test/test_page_test.routing.yml w/core/modules/system/tests/modules/test_page_test/test_page_test.routing.yml
index 7c20600..61f063c 100644
--- c/core/modules/system/tests/modules/test_page_test/test_page_test.routing.yml
+++ w/core/modules/system/tests/modules/test_page_test/test_page_test.routing.yml
@@ -23,5 +23,6 @@ test_page_test_page:
   pattern: '/test-page'
   defaults:
     _content: '\Drupal\test_page_test\Controller\Test::testPage'
+    _title: 'Test front page'
   requirements:
     _access: 'TRUE'