diff --git a/core/modules/views/lib/Drupal/views/Tests/UI/DisplayTest.php b/core/modules/views/lib/Drupal/views/Tests/UI/DisplayTest.php
index 5457ec7..8607458 100644
--- a/core/modules/views/lib/Drupal/views/Tests/UI/DisplayTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/UI/DisplayTest.php
@@ -169,14 +169,15 @@ public function testCloneDisplay() {
     $view = views_get_view($view['name']);
     $view->initDisplay();
 
-    $displays = $view->displayHandlers;
-    $this->assertTrue($displays['page_2'], 'The new page display got saved.');
-    $this->assertTrue($displays['block_1'], 'The new block display got saved.');
-    $this->assertEqual($displays['page_2']->display['display_title'], 'Page');
-    $this->assertEqual($displays['block_1']->display['display_plugin'], 'block');
-    $this->assertEqual($displays['block_1']->display['display_title'], 'Block', 'The new display title got generated as expected.');
-    $this->assertEqual($displays['block_1']->getOption('title'), $random_title, 'The overridden title option from the display got copied into the clone');
-    $this->assertEqual($displays['block_1']->getOption('css_class'), $random_css, 'The overridden css_class option from the display got copied into the clone');
+    $page_2 = $view->displayHandlers->get('page_2');
+    $this->assertTrue($page_2, 'The new page display got saved.');
+    $this->assertEqual($page_2->display['display_title'], 'Page');
+    $block_1 = $view->displayHandlers->get('block_1');
+    $this->assertTrue($block_1, 'The new block display got saved.');
+    $this->assertEqual($block_1->display['display_plugin'], 'block');
+    $this->assertEqual($block_1->display['display_title'], 'Block', 'The new display title got generated as expected.');
+    $this->assertEqual($block_1->getOption('title'), $random_title, 'The overridden title option from the display got copied into the clone');
+    $this->assertEqual($block_1->getOption('css_class'), $random_css, 'The overridden css_class option from the display got copied into the clone');
   }
 
   /**