diff --git a/core/tests/Drupal/Tests/Core/Lock/LockBackendAbstractTest.php b/core/tests/Drupal/Tests/Core/Lock/LockBackendAbstractTest.php
index ff4823f..933f8b5 100644
--- a/core/tests/Drupal/Tests/Core/Lock/LockBackendAbstractTest.php
+++ b/core/tests/Drupal/Tests/Core/Lock/LockBackendAbstractTest.php
@@ -13,12 +13,15 @@
  * Tests the LockBackendAbstract class.
  *
  * @group Drupal
+ * @group Lock
  *
  * @see \Drupal\Tests\Core\Lock\LockBackendAbstractTest
  */
 class LockBackendAbstractTest extends UnitTestCase {
 
   /**
+   * The Mocked LockBackendAbstract object.
+   *
    * @var \Drupal\Core\Lock\LockBackendAbstract|\PHPUnit_Framework_MockObject_MockObject
    */
   protected $lock;