diff --git a/core/tests/Drupal/Tests/KernelTestBase.php b/core/tests/Drupal/Tests/KernelTestBase.php
index d59d331..9984a6f 100644
--- a/core/tests/Drupal/Tests/KernelTestBase.php
+++ b/core/tests/Drupal/Tests/KernelTestBase.php
@@ -217,7 +217,7 @@ protected function bootEnvironment() {
     // @see /core/tests/bootstrap.php
     $this->classLoader = $GLOBALS['loader'];
 
-    require_once DRUPAL_ROOT . '/core/includes/bootstrap.inc';
+    require_once $this->root . '/core/includes/bootstrap.inc';
 
     // Set up virtual filesystem.
     // Uses a random ID, since created test files may be processed by file
diff --git a/core/tests/Drupal/Tests/KernelTestBaseTest.php b/core/tests/Drupal/Tests/KernelTestBaseTest.php
index 60cd93d..b68bbb5 100644
--- a/core/tests/Drupal/Tests/KernelTestBaseTest.php
+++ b/core/tests/Drupal/Tests/KernelTestBaseTest.php
@@ -104,7 +104,8 @@ public function testSetUp() {
   public function testSetUpDoesNotLeak() {
     $this->assertArrayNotHasKey('destroy-me', $GLOBALS);
 
-    $expected = [];
+    // We store teh active configuration in the DB.
+    $expected = ['config' => 'config'];
     $schema = $this->container->get('database')->schema();
     $this->assertEquals($expected, $schema->findTables('%'));
   }