diff --git a/core/modules/system/tests/modules/common_test/common_test.routing.yml b/core/modules/system/tests/modules/common_test/common_test.routing.yml
index 576a448..f3ad504 100644
--- a/core/modules/system/tests/modules/common_test/common_test.routing.yml
+++ b/core/modules/system/tests/modules/common_test/common_test.routing.yml
@@ -7,6 +7,7 @@ common_test_l_active_class:
 common_test_js_and_css_querystring:
   pattern: 'common-test/query-string'
   defaults:
+    _title: 'Test querystring'
     _content: '\Drupal\common_test\Controller\CommonTestController::jsAndCssQuerystring'
   requirements:
     _permission: 'access content'
diff --git a/core/modules/system/tests/modules/common_test/lib/Drupal/common_test/Controller/CommonTestController.php b/core/modules/system/tests/modules/common_test/lib/Drupal/common_test/Controller/CommonTestController.php
index 32279af..dd75381 100644
--- a/core/modules/system/tests/modules/common_test/lib/Drupal/common_test/Controller/CommonTestController.php
+++ b/core/modules/system/tests/modules/common_test/lib/Drupal/common_test/Controller/CommonTestController.php
@@ -63,8 +63,6 @@ public function typeLinkActiveClass() {
    * Adds a JavaScript file and a CSS file with a query string appended.
    */
   public function jsAndCssQuerystring() {
-    drupal_set_title('Test querystring');
-
     drupal_add_library('system', 'drupalSettings');
     drupal_add_js(drupal_get_path('module', 'node') . '/node.js');
     drupal_add_css(drupal_get_path('module', 'node') . '/css/node.admin.css');