diff --git a/core/tests/Drupal/Tests/Core/Cache/NullBackendTest.php b/core/tests/Drupal/Tests/Core/Cache/NullBackendTest.php
index 22d4df3..fc3a700 100644
--- a/core/tests/Drupal/Tests/Core/Cache/NullBackendTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/NullBackendTest.php
@@ -15,7 +15,7 @@
  *
  * @group Cache
  */
-class NullBackendTest extends UnitTestBase {
+class NullBackendTest extends UnitTestCase {
 
   public static function getInfo() {
     return array(