diff -u b/core/modules/filter/src/Plugin/Filter/FilterHtml.php b/core/modules/filter/src/Plugin/Filter/FilterHtml.php
--- b/core/modules/filter/src/Plugin/Filter/FilterHtml.php
+++ b/core/modules/filter/src/Plugin/Filter/FilterHtml.php
@@ -82,19 +82,23 @@
 
   /**
    * Get inline template to avoid Twig autoescape
-   * See https://www.drupal.org/node/2311123
+   *
    * @param string $content
+   *   A string with the content for the template.
+   *
    * @param boolean $is_html_code
-   * @return string
+   *   A boolean indicating whether the content should be rendered or
+   *   be included inside <code> tag.
+   *
+   * @return
+   *   A inline_template render array.
    */
-  private function getInlineTemplate($content, $is_html_code) {
+  protected function getInlineTemplate($content, $is_html_code) {
     return array(
-      'string' => array(
-        '#type' => 'inline_template',
-        '#template' => $is_html_code ? '<code>{{content}}</code>' : $content,
-        '#context' => array(
-          'content' => $content,
-        ),
+      '#type' => 'inline_template',
+      '#template' => $is_html_code ? '<code>{{content}}</code>' : $content,
+      '#context' => array(
+        'content' => $content,
       ),
     );
   }
@@ -163,8 +167,8 @@
       if (!empty($tips[$tag])) {
         $rows[] = array(
           array('data' => $tips[$tag][0], 'class' => array('description')),
-          array('data' => drupal_render($this->getInlineTemplate($tips[$tag][1], TRUE)), 'class' => array('type')),
-          array('data' => drupal_render($this->getInlineTemplate($tips[$tag][1], FALSE)), 'class' => array('get'))
+          array('data' => $this->getInlineTemplate($tips[$tag][1], TRUE), 'class' => array('type')),
+          array('data' => $this->getInlineTemplate($tips[$tag][1], FALSE), 'class' => array('get'))
         );
       }
       else {
@@ -194,8 +198,8 @@
     foreach ($entities as $entity) {
       $rows[] = array(
         array('data' => $entity[0], 'class' => array('description')),
-        array('data' => drupal_render($this->getInlineTemplate($entity[1], TRUE)), 'class' => array('type')),
-        array('data' => drupal_render($this->getInlineTemplate($entity[1], FALSE)), 'class' => array('get'))
+        array('data' => $this->getInlineTemplate($entity[1], TRUE), 'class' => array('type')),
+        array('data' => $this->getInlineTemplate($entity[1], FALSE), 'class' => array('get'))
       );
     }
     $table = array(