diff --git a/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestForm.php b/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestForm.php
index 5d1a33b..3704f15 100644
--- a/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestForm.php
+++ b/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestForm.php
@@ -9,7 +9,6 @@
 
 use Drupal\Core\Form\FormBase;
 use Drupal\Core\Form\FormStateInterface;
-use Symfony\Component\HttpFoundation\Response;
 
 /**
  * Dummy form for testing DialogRenderer with _form routes.
@@ -72,8 +71,4 @@ public function submitForm(array &$form, FormStateInterface $form_state) {}
    */
   public function validateForm(array &$form, FormStateInterface $form_state) {}
 
-  public function preview(array &$form, FormStateInterface $form_state) {
-    return new Response('#ajax-triggered submit worked!');
-  }
-
 }
diff --git a/core/modules/views/src/Tests/Plugin/DisplayFeedTest.php b/core/modules/views/src/Tests/Plugin/DisplayFeedTest.php
index d1b9f50..8411ce2 100644
--- a/core/modules/views/src/Tests/Plugin/DisplayFeedTest.php
+++ b/core/modules/views/src/Tests/Plugin/DisplayFeedTest.php
@@ -56,8 +56,8 @@ public function testFeedOutput() {
 
     $this->drupalGet('test-feed-display.xml');
     $result = $this->xpath('//title');
-    $this->assertEqual($result[1], $node_title, 'Node title with HTML entities displays correctly.');
     $this->assertEqual($result[0], $site_name, 'The site title is used for the feed title.');
+    $this->assertEqual($result[1], $node_title, 'Node title with HTML entities displays correctly.');
 
     $view = $this->container->get('entity.manager')->getStorage('view')->load('test_display_feed');
     $display = &$view->getDisplay('feed_1');
diff --git a/core/modules/views/tests/modules/views_test_config/test_views/views.view.test_display_feed.yml b/core/modules/views/tests/modules/views_test_config/test_views/views.view.test_display_feed.yml
index 4c178a1..4b54199 100644
--- a/core/modules/views/tests/modules/views_test_config/test_views/views.view.test_display_feed.yml
+++ b/core/modules/views/tests/modules/views_test_config/test_views/views.view.test_display_feed.yml
@@ -115,8 +115,6 @@ display:
       style:
         type: rss
       sitename_title: true
-      field_langcode: '***LANGUAGE_language_content***'
-      field_langcode_add_to_query: null
       display_description: ''
     display_plugin: feed
     display_title: 'Feed with Fields'
diff --git a/core/modules/views/views.theme.inc b/core/modules/views/views.theme.inc
index 630d6eb..fd68580 100644
--- a/core/modules/views/views.theme.inc
+++ b/core/modules/views/views.theme.inc
@@ -912,9 +912,9 @@ function template_preprocess_views_view_rss(&$variables) {
  */
 function template_preprocess_views_view_row_rss(&$variables) {
   $item = $variables['row'];
-  $variables['title'] = String::checkPlain($item->title);
+  $variables['title'] = $item->title;
   $variables['link'] = $item->link;
-  $variables['description'] = String::checkPlain($item->description);
+  $variables['description'] = $item->description;
   $variables['item_elements'] = array();
   foreach ($item->elements as $element) {
     if (isset($element['attributes']) && is_array($element['attributes'])) {