diff --git a/core/misc/ajax.es6.js b/core/misc/ajax.es6.js
index fea3c6c964..1dae116a80 100644
--- a/core/misc/ajax.es6.js
+++ b/core/misc/ajax.es6.js
@@ -1060,7 +1060,7 @@
    *
    * @see https://www.drupal.org/node/2940704
    */
-  Drupal.theme.ajaxWrapperMultipleRootElements = ($elements) => (
+  Drupal.theme.ajaxWrapperMultipleRootElements = $elements => (
     $('<div></div>').append($elements)
   );
 
diff --git a/core/tests/Drupal/FunctionalJavascriptTests/Ajax/AjaxTest.php b/core/tests/Drupal/FunctionalJavascriptTests/Ajax/AjaxTest.php
index cbc73734f9..5d11ce49b4 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/Ajax/AjaxTest.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/Ajax/AjaxTest.php
@@ -2,6 +2,8 @@
 
 namespace Drupal\FunctionalJavascriptTests\Ajax;
 
+use Drupal\FunctionalJavascriptTests\WebDriverTestBase;
+
 /**
  * Tests AJAX responses.
  *