diff --git c/core/modules/aggregator/tests/modules/aggregator_test/lib/Drupal/aggregator_test/Controller/AggregatorTestRssController.php w/core/modules/aggregator/tests/modules/aggregator_test/lib/Drupal/aggregator_test/Controller/AggregatorTestRssController.php
index 1f70392..3fb8c40 100644
--- c/core/modules/aggregator/tests/modules/aggregator_test/lib/Drupal/aggregator_test/Controller/AggregatorTestRssController.php
+++ w/core/modules/aggregator/tests/modules/aggregator_test/lib/Drupal/aggregator_test/Controller/AggregatorTestRssController.php
@@ -60,7 +60,7 @@ public function testFeed($use_last_modified, $use_etag, Request $request) {
   }
 
   public function testRedirect() {
-    return $this->redirect($this->urlGenerator()->generateFromRoute('aggregator_test_feed'), 301);
+    return $this->redirect('aggregator_test_feed', array(), 301);
   }
 
 }