diff --git a/core/modules/simpletest/src/Tests/ParentProfileTest.php b/core/modules/simpletest/src/Tests/ParentProfileTest.php
index cdd920a..26fe75f 100644
--- a/core/modules/simpletest/src/Tests/ParentProfileTest.php
+++ b/core/modules/simpletest/src/Tests/ParentProfileTest.php
@@ -7,14 +7,14 @@
 
 namespace Drupal\simpletest\Tests;
 
-use Drupal\Component\Utility\Settings;
 use Drupal\Core\Extension\ExtensionDiscovery;
-use Drupal\simpletest\DrupalUnitTestBase;
+use Drupal\Core\Site\Settings;
+use Drupal\simpletest\KernelTestBase;
 
 /**
  * Tests installation profile inheritance in tests.
  */
-class ParentProfileTest extends DrupalUnitTestBase {
+class ParentProfileTest extends KernelTestBase {
 
   public static function getInfo() {
     return array(
@@ -33,7 +33,7 @@ function testParentProfile() {
     $settings['install_profile'] = 'minimal';
     new Settings($settings);
 
-    $discovery = new ExtensionDiscovery();
+    $discovery = new ExtensionDiscovery(\Drupal::root());
     $modules = $discovery->scan('module');
     $this->assertTrue(isset($modules['drupal_system_listing_compatible_test']));
   }