diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 3e74521..757b61c 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1237,7 +1237,7 @@ function template_preprocess_html(&$variables) {
   // Construct page title.
   if (isset($variables['page']['#title']) && is_array($variables['page']['#title'])) {
     // Do an early render if the title is a render array.
-    $variables['page']['#title'] = (string) \Drupal::service('renderer')->render($variables['page']['#title']);
+    $variables['page']['#title'] = \Drupal::service('renderer')->render($variables['page']['#title']);
   }
   if (!empty($variables['page']['#title'])) {
     $head_title = array(
diff --git a/core/modules/views_ui/src/ViewUI.php b/core/modules/views_ui/src/ViewUI.php
index 8168bf2..a9d7d9e 100644
--- a/core/modules/views_ui/src/ViewUI.php
+++ b/core/modules/views_ui/src/ViewUI.php
@@ -716,7 +716,11 @@ public function renderPreview($display_id, $args = array()) {
                   '#template' => "<strong>{% trans 'Title' %}</strong>",
                 ),
               ),
-              Xss::filterAdmin($executable->getTitle()),
+              array(
+                'data' => array(
+                  '#markup' => $executable->getTitle(),
+                ),
+              ),
             );
             if (isset($path)) {
               // @todo Views should expect and store a leading /. See: