diff --git a/core/modules/views/lib/Drupal/views/Tests/Plugin/StyleTest.php b/core/modules/views/lib/Drupal/views/Tests/Plugin/StyleTest.php
index 2a19bc8..f567068 100644
--- a/core/modules/views/lib/Drupal/views/Tests/Plugin/StyleTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/Plugin/StyleTest.php
@@ -228,8 +228,7 @@ function testCustomRowClasses() {
     $view->style_plugin->options['row_class'] = $random_name . " test-token-[name]";
 
     $output = $view->preview();
-    $rendered_output = drupal_render($preview);
-    $this->storeViewPreview($rendered_output);
+    $this->storeViewPreview(drupal_render($output));
 
     $rows = $this->elements->body->div->div->div;
     $count = 0;
diff --git a/core/modules/views/lib/Drupal/views/Tests/Plugin/StyleUnformattedTest.php b/core/modules/views/lib/Drupal/views/Tests/Plugin/StyleUnformattedTest.php
index 8d105a7..72d6a93 100644
--- a/core/modules/views/lib/Drupal/views/Tests/Plugin/StyleUnformattedTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/Plugin/StyleUnformattedTest.php
@@ -34,8 +34,7 @@ function testDefaultRowClasses() {
     $view = views_get_view('test_view');
     $view->setDisplay();
     $output = $view->preview();
-    $rendered_output = drupal_render($preview);
-    $this->storeViewPreview($rendered_output);
+    $this->storeViewPreview(drupal_render($output));
 
     $rows = $this->elements->body->div->div->div;
     $count = 0;
diff --git a/core/modules/views/lib/Drupal/views/Tests/ViewRenderTest.php b/core/modules/views/lib/Drupal/views/Tests/ViewRenderTest.php
index c3fd6a4..8c7f071 100644
--- a/core/modules/views/lib/Drupal/views/Tests/ViewRenderTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/ViewRenderTest.php
@@ -42,7 +42,7 @@ public function testRender() {
     // Make sure that the rendering just calls the preprocess function once.
     $view = views_get_view('test_view_render');
     $output = $view->preview();
-    drupal_render($preview);
+    drupal_render($output);
 
     $this->assertEqual(state()->get('views_render.test'), 1);
   }