diff --git a/core/modules/rest/lib/Drupal/rest/Tests/ReadTest.php b/core/modules/rest/lib/Drupal/rest/Tests/ReadTest.php
index f0c4d86..ce44e0e 100644
--- a/core/modules/rest/lib/Drupal/rest/Tests/ReadTest.php
+++ b/core/modules/rest/lib/Drupal/rest/Tests/ReadTest.php
@@ -60,7 +60,7 @@ public function testRead() {
       $this->assertEqual($data['uuid'][0]['value'], $entity->uuid(), 'Entity UUID is correct');
 
       // Try to read the entity with an unsupported mime format.
-      $response = $this->httpRequest('entity/' . $entity_type . '/' . $entity->id(), 'GET', NULL, 'application/wrongformat');
+      $this->httpRequest('entity/' . $entity_type . '/' . $entity->id(), 'GET', NULL, 'application/wrongformat');
       $this->assertResponse(406);
 
       // Try to read an entity that does not exist.