diff --git a/core/modules/system/tests/Drupal/system/Tests/Plugin/Type/MenuLocalTaskManagerTest.php b/core/modules/system/tests/Drupal/system/Tests/Plugin/Type/MenuLocalTaskManagerTest.php
index 6fe9e1d..1827d5b 100644
--- a/core/modules/system/tests/Drupal/system/Tests/Plugin/Type/MenuLocalTaskManagerTest.php
+++ b/core/modules/system/tests/Drupal/system/Tests/Plugin/Type/MenuLocalTaskManagerTest.php
@@ -62,13 +62,6 @@ class MenuLocalTaskManagerTest extends UnitTestCase {
    */
   protected $factory;
 
-  /**
-   * The mocked local task plugin base class.
-   *
-   * @var \PHPUnit_Framework_MockObject_MockObject
-   */
-  protected $basePlugin;
-
   public static function getInfo() {
     return array(
       'name' => 'Local tasks manager.',
@@ -89,11 +82,6 @@ protected function setUp() {
     $this->pluginDiscovery = $this->getMock('Drupal\Component\Plugin\Discovery\DiscoveryInterface');
     $this->factory = $this->getMock('Drupal\Component\Plugin\Factory\FactoryInterface');
 
-    $this->basePlugin = $this
-      ->getMockBuilder('Drupal\system\Plugin\MenuLocalTaskBase')
-      ->disableOriginalConstructor()
-      ->getMock();
-
     $this->setupLocalTaskManager();
   }
 
@@ -158,15 +146,16 @@ public function testGetLocalTasksForRouteSingleLevelTitle() {
    * @see \Drupal\system\Plugin\Type\MenuLocalTaskManager::getTitle()
    */
   public function testGetTitle() {
-    $this->basePlugin->expects($this->once())
+    $menu_local_task = $this->getMock('Drupal\system\Plugin\MenuLocalTaskInterface');
+    $menu_local_task->expects($this->once())
       ->method('getTitle');
 
     $this->controllerResolver->expects($this->once())
       ->method('getArguments')
-      ->with($this->request, array($this->basePlugin, 'getTitle'))
+      ->with($this->request, array($menu_local_task, 'getTitle'))
       ->will($this->returnValue(array()));
 
-    $this->manager->getTitle($this->basePlugin);
+    $this->manager->getTitle($menu_local_task);
   }
 
   /**
@@ -175,15 +164,16 @@ public function testGetTitle() {
    * @see \Drupal\system\Plugin\Type\MenuLocalTaskManager::getPath()
    */
   public function testGetPath() {
-    $this->basePlugin->expects($this->once())
+    $menu_local_task = $this->getMock('Drupal\system\Plugin\MenuLocalTaskInterface');
+    $menu_local_task->expects($this->once())
       ->method('getPath');
 
     $this->controllerResolver->expects($this->once())
       ->method('getArguments')
-      ->with($this->request, array($this->basePlugin, 'getPath'))
+      ->with($this->request, array($menu_local_task, 'getPath'))
       ->will($this->returnValue(array()));
 
-    $this->manager->getPath($this->basePlugin);
+    $this->manager->getPath($menu_local_task);
   }
 
   /**