diff --git a/core/modules/system/src/Tests/Form/LanguageSelectElementTest.php b/core/modules/system/src/Tests/Form/LanguageSelectElementTest.php
index f41e98b..551be45 100644
--- a/core/modules/system/src/Tests/Form/LanguageSelectElementTest.php
+++ b/core/modules/system/src/Tests/Form/LanguageSelectElementTest.php
@@ -56,7 +56,7 @@ function testLanguageSelectElementOptions() {
       $this->assertField($id, format_string('The @id field was found on the page.', array('@id' => $id)));
       $options = array();
       foreach ($this->container->get('language_manager')->getLanguages($flags) as $langcode => $language) {
-        $options[$langcode] = $language->locked ? t('- @name -', array('@name' => $language->getName())) : $language->getName();
+        $options[$langcode] = $language->isLocked() ? t('- @name -', array('@name' => $language->getName())) : $language->getName();
       }
       $this->_testLanguageSelectElementOptions($id, $options);
     }