diff -u b/core/modules/search/src/Form/SearchPageForm.php b/core/modules/search/src/Form/SearchPageForm.php
--- b/core/modules/search/src/Form/SearchPageForm.php
+++ b/core/modules/search/src/Form/SearchPageForm.php
@@ -69,7 +69,10 @@
     );
 
     $form['help_link'] = array(
-      '#markup' => \Drupal::linkGenerator()->generate($this->t('Search help'), Url::fromRoute('search.help_' . $this->entity->id())),
+      '#type' => 'link',
+      '#url' => new Url('search.help_' . $this->entity->id()),
+      '#title' => $this->t('Search help'),
+      '#options' => array('attributes' => array('class' => 'search-help-link')),
     );
 
     // Allow the plugin to add to or alter the search form.