diff --git a/core/modules/field/lib/Drupal/field/Tests/BulkDeleteTest.php b/core/modules/field/lib/Drupal/field/Tests/BulkDeleteTest.php
index d26c079..e4786ec 100644
--- a/core/modules/field/lib/Drupal/field/Tests/BulkDeleteTest.php
+++ b/core/modules/field/lib/Drupal/field/Tests/BulkDeleteTest.php
@@ -24,13 +24,6 @@ class BulkDeleteTest extends FieldUnitTestBase {
   protected $fields;
 
   /**
-   * The instance to use in this test.
-   *
-   * @var array
-   */
-  protected $instances;
-
-  /**
    * The entities to use in this test.
    *
    * @var array
@@ -132,7 +125,6 @@ function setUp() {
     parent::setUp();
 
     $this->fields = array();
-    $this->instances = array();
     $this->entities = array();
     $this->entities_by_bundles = array();
 
@@ -163,12 +155,11 @@ function setUp() {
     $id = 1;
     foreach ($this->bundles as $bundle) {
       foreach ($this->fields as $field) {
-        $instance = entity_create('field_instance', array(
+        entity_create('field_instance', array(
           'field_name' => $field->id(),
           'entity_type' => $this->entity_type,
           'bundle' => $bundle,
         ))->save();
-        $this->instances[] = $instance;
       }
 
       for ($i = 0; $i < 10; $i++) {