diff --git a/core/modules/views_ui/lib/Drupal/views_ui/Tests/PreviewTest.php b/core/modules/views_ui/lib/Drupal/views_ui/Tests/PreviewTest.php
index c0b8907..3929649 100644
--- a/core/modules/views_ui/lib/Drupal/views_ui/Tests/PreviewTest.php
+++ b/core/modules/views_ui/lib/Drupal/views_ui/Tests/PreviewTest.php
@@ -171,7 +171,7 @@ public function testPreviewWithPagersUI() {
    *   The expected number of rows in the preview.
    */
   protected function getPreviewAJAX($view_name, $panel_id, $row_count) {
-    $this->drupalGet('admin/structure/views/view/' . $view_name . '/preview/' .$panel_id);
+    $this->drupalGet('admin/structure/views/view/' . $view_name . '/preview/' . $panel_id);
     $result = $this->drupalPostAJAX(NULL, array(), array('op' => t('Update preview')));
 
     // Has AJAX callback replied with an insert command? If so, we can