diff --git a/core/modules/forum/src/Controller/ForumController.php b/core/modules/forum/src/Controller/ForumController.php
index b5bfec6..9efb774 100644
--- a/core/modules/forum/src/Controller/ForumController.php
+++ b/core/modules/forum/src/Controller/ForumController.php
@@ -78,12 +78,12 @@ class ForumController extends ControllerBase {
   /**
    * @var \Drupal\Core\Entity\EntityTypeInterface
    */
-  private $nodeListDefinition;
+  protected $nodeListDefinition;
 
   /**
    * @var \Drupal\Core\Entity\EntityTypeInterface
    */
-  private $nodeDefinition;
+  protected $nodeDefinition;
 
   /**
    * Constructs a ForumController object.
@@ -128,7 +128,7 @@ public function __construct(ForumManagerInterface $forum_manager, VocabularyStor
   public static function create(ContainerInterface $container) {
     /** @var \Drupal\Core\Entity\EntityManagerInterface $entity_manager */
     $entity_manager = $container->get('entity.manager');
-    $tags = $entity_manager->getDefinition('taxonomy_term')->getListCacheTags();
+
     return new static(
       $container->get('forum_manager'),
       $entity_manager->getStorage('taxonomy_vocabulary'),