only in patch2:
unchanged:
--- a/src/Tests/RedirectUITest.php
+++ b/src/Tests/RedirectUITest.php
@@ -397,7 +397,8 @@ class RedirectUITest extends WebTestBase {
     $headers = $this->drupalGetHeaders(TRUE);
     // Note, self::assertCacheTag() cannot be used here since it only looks at
     // the final set of headers.
-    $this->assertEqual(implode(' ', $redirect1->getCacheTags()), $headers[0]['x-drupal-cache-tags'], 'Redirect cache tags properly set.');
+    $expected = 'http_response ' . implode(' ', $redirect1->getCacheTags());
+    $this->assertEqual($expected, $headers[0]['x-drupal-cache-tags'], 'Redirect cache tags properly set.');
 
     // First request should be a cache MISS.
     $this->assertEqual($headers[0]['x-drupal-cache'], 'MISS', 'First request to the redirect was not cached.');