only in patch2:
unchanged:
--- a/core/modules/language/lib/Drupal/language/Tests/Condition/LanguageConditionTest.php
+++ b/core/modules/language/lib/Drupal/language/Tests/Condition/LanguageConditionTest.php
@@ -48,9 +48,6 @@ public static function getInfo() {
   protected function setUp() {
     parent::setUp();
 
-    // This is needed for language_default().
-    // @todo remove this when language_default() no longer needs variable_get().
-    $this->installSchema('system', 'variable');
     $this->installConfig(array('language'));
 
     // Setup English.