diff --git a/src/Plugin/DisplayVariant/BlockDisplayVariant.php b/src/Plugin/DisplayVariant/BlockDisplayVariant.php
index 87ce680..ce51355 100644
--- a/src/Plugin/DisplayVariant/BlockDisplayVariant.php
+++ b/src/Plugin/DisplayVariant/BlockDisplayVariant.php
@@ -37,7 +37,6 @@
   use AjaxFormTrait;
   use BlockVariantTrait;
   use ConditionVariantTrait;
-  use RefinableCacheableDependencyTrait;
 
   /**
    * The context handler.
@@ -134,7 +133,6 @@ public function defaultConfiguration() {
       'blocks' => [],
       'selection_conditions' => [],
       'selection_logic' => 'and',
-      'page_title' => '',
     ];
   }
 
diff --git a/tests/src/Unit/BlockDisplayVariantTest.php b/tests/src/Unit/BlockDisplayVariantTest.php
index 282b116..62c2993 100644
--- a/tests/src/Unit/BlockDisplayVariantTest.php
+++ b/tests/src/Unit/BlockDisplayVariantTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains \Drupal\Tests\page_manager\Unit\BlockDisplayVariantTest.
+ * Contains \Drupal\Tests\ctools\Unit\BlockDisplayVariantTest.
  */
 
 namespace Drupal\Tests\ctools\Unit;
diff --git a/tests/src/Unit/BlockPluginCollectionTest.php b/tests/src/Unit/BlockPluginCollectionTest.php
index 0a2818b..c2d6087 100644
--- a/tests/src/Unit/BlockPluginCollectionTest.php
+++ b/tests/src/Unit/BlockPluginCollectionTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains \Drupal\Tests\page_manager\Unit\BlockPluginCollectionTest.
+ * Contains \Drupal\Tests\ctools\Unit\BlockPluginCollectionTest.
  */
 
 namespace Drupal\Tests\ctools\Unit;
diff --git a/tests/src/Unit/BlockVariantTraitTest.php b/tests/src/Unit/BlockVariantTraitTest.php
index e95ef2c..3eb4c86 100644
--- a/tests/src/Unit/BlockVariantTraitTest.php
+++ b/tests/src/Unit/BlockVariantTraitTest.php
@@ -2,10 +2,10 @@
 
 /**
  * @file
- * Contains \Drupal\Tests\page_manager\Unit\BlockVariantTraitTest.
+ * Contains \Drupal\Tests\ctools\Unit\BlockVariantTraitTest.
  */
 
-namespace Drupal\Tests\page_manager\Unit;
+namespace Drupal\Tests\ctools\Unit;
 
 use Drupal\Component\Uuid\UuidInterface;
 use Drupal\ctools\Plugin\BlockPluginCollection;
@@ -141,4 +141,11 @@ protected function getBlockConfig() {
     return $this->blockConfig;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getRegionNames() {
+    return [];
+  }
+
 }