diff --git a/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationElementTest.php b/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationElementTest.php
index 644c03b..91ec9ce 100644
--- a/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationElementTest.php
+++ b/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationElementTest.php
@@ -101,13 +101,5 @@ class LanguageConfigurationElementTest extends WebTestBase {
     language_save_default_configuration('custom_type', 'some_bundle', array('langcode' => 'authors_default', 'language_hidden' => FALSE));
     $this->drupalGet('language-tests/language_configuration_element_test');
     $this->assertOptionSelected('edit-langcode', 'bb');
-
-    // Some custom language code, hook_language_default_langcode() is
-    // implemented in the language_elements_test module.
-    // @todo: Implement a follow-up for this feature, after
-    // https://drupal.org/node/1739928 is commited.
-    /*language_save_default_configuration('custom_type', 'custom_bundle', array('language' => 'custom_code', 'language_hidden' => FALSE));
-    $langcode = language_get_default_langcode('custom_type', 'custom_bundle');
-    $this->assertEqual($langcode, 'custom_value');*/
   }
 }