only in patch2:
unchanged:
--- a/core/tests/Drupal/KernelTests/KernelTestBaseTest.php
+++ b/core/tests/Drupal/KernelTests/KernelTestBaseTest.php
@@ -37,7 +37,6 @@ public function testBootEnvironment() {
             substr($this->databasePrefix, 10) => array(
               'files' => array(
                 'config' => array(
-                  'active' => array(),
                   'staging' => array(),
                 ),
               ),