diff -u b/core/modules/page_cache/tests/modules/page_cache_test/src/PageCacheTestCacheableStreamedResponse.php b/core/modules/page_cache/tests/modules/page_cache_test/src/PageCacheTestCacheableStreamedResponse.php
--- b/core/modules/page_cache/tests/modules/page_cache_test/src/PageCacheTestCacheableStreamedResponse.php
+++ b/core/modules/page_cache/tests/modules/page_cache_test/src/PageCacheTestCacheableStreamedResponse.php
@@ -24,2 +24,3 @@
   }
+
 }