diff --git a/core/modules/rest/tests/src/Unit/EventSubscriber/ResourceResponseSubscriberTest.php b/core/modules/rest/tests/src/Unit/EventSubscriber/ResourceResponseSubscriberTest.php
index 3efc3f021ab..50591f25074 100644
--- a/core/modules/rest/tests/src/Unit/EventSubscriber/ResourceResponseSubscriberTest.php
+++ b/core/modules/rest/tests/src/Unit/EventSubscriber/ResourceResponseSubscriberTest.php
@@ -64,9 +64,6 @@ class ResourceResponseSubscriberTest extends UnitTestCase {
       'associative array' => [['test' => 'foobar']],
       'boolean true' => [TRUE],
       'boolean false' => [FALSE],
-      // @todo Not supported. https://www.drupal.org/node/2427811
-      // [new \stdClass()],
-      // [(object) ['test' => 'foobar']],
     ];
   }