diff --git a/core/tests/Drupal/Tests/UnitTestCase.php b/core/tests/Drupal/Tests/UnitTestCase.php
index 8aaeb85743..82192a3566 100644
--- a/core/tests/Drupal/Tests/UnitTestCase.php
+++ b/core/tests/Drupal/Tests/UnitTestCase.php
@@ -17,6 +17,8 @@
  * @ingroup testing
  */
 abstract class UnitTestCase extends TestCase {
+  
+  use Phpunit5FCTrait;
 
   /**
    * The random generator.