diff --git a/core/modules/system/lib/Drupal/system/Tests/Common/JavaScriptTest.php b/core/modules/system/lib/Drupal/system/Tests/Common/JavaScriptTest.php
index c48ca70..565e35e 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Common/JavaScriptTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Common/JavaScriptTest.php
@@ -81,11 +81,11 @@ function testAddFile() {
   function testAddSetting() {
     // Add a file in order to test default settings.
     drupal_add_library('system', 'drupalSettings');
-    $javascript = drupal_add_js();
+    $javascript = _drupal_add_js();
     $last_settings = reset($javascript['settings']['data']);
     $this->assertTrue(array_key_exists('currentPath', $last_settings['path']), 'The current path JavaScript setting is set correctly.');
 
-    $javascript = drupal_add_js(array('drupal' => 'rocks', 'dries' => 280342800), 'setting');
+    $javascript = _drupal_add_js(array('drupal' => 'rocks', 'dries' => 280342800), 'setting');
     $last_settings = end($javascript['settings']['data']);
     $this->assertEqual(280342800, $last_settings['dries'], 'JavaScript setting is set correctly.');
     $this->assertEqual('rocks', $last_settings['drupal'], 'The other JavaScript setting is set correctly.');