diff --git a/core/modules/language/lib/Drupal/language/Tests/LanguageSwitchingTest.php b/core/modules/language/lib/Drupal/language/Tests/LanguageSwitchingTest.php
index 9eca1b7..4aebe5c 100644
--- a/core/modules/language/lib/Drupal/language/Tests/LanguageSwitchingTest.php
+++ b/core/modules/language/lib/Drupal/language/Tests/LanguageSwitchingTest.php
@@ -72,14 +72,14 @@ function testLanguageBlock() {
     foreach ($language_switcher->ul->li as $link) {
       $classes = explode(" ", (string) $link['class']);
       list($langcode) = array_intersect($classes, array('en', 'fr'));
-      if (in_array('active', $classes)) {
+      if (in_array('is-active', $classes)) {
         $links['active'][] = $langcode;
       }
       else {
         $links['inactive'][] = $langcode;
       }
       $anchor_classes = explode(" ", (string) $link->a['class']);
-      if (in_array('active', $anchor_classes)) {
+      if (in_array('is-active', $anchor_classes)) {
         $anchors['active'][] = $langcode;
       }
       else {