diff --git a/core/modules/system/tests/modules/form_test/src/Controller/FormTestController.php b/core/modules/system/tests/modules/form_test/src/Controller/FormTestController.php
index 600b1d9..0a211f1 100644
--- a/core/modules/system/tests/modules/form_test/src/Controller/FormTestController.php
+++ b/core/modules/system/tests/modules/form_test/src/Controller/FormTestController.php
@@ -7,12 +7,41 @@
 namespace Drupal\form_test\Controller;
 
 use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Drupal\Core\Form\FormBuilderInterface;
 use Drupal\Core\Language\LanguageInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Controller routines for form_test routes.
  */
-class FormTestController extends ControllerBase {
+class FormTestController extends ControllerBase implements ContainerInjectionInterface {
+
+  /**
+   * The form builder.
+   *
+   * @var \Drupal\Core\Form\FormBuilderInterface
+   */
+  protected $formBuilder;
+
+  /**
+   * Constructs a new FormTestController.
+   *
+   * @param \Drupal\Core\Form\FormBuilderInterface $form_builder
+   *   The form builder.
+   */
+  public function __construct(FormBuilderInterface $form_builder) {
+    $this->formBuilder = $form_builder;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+   return new static(
+     $container->get('form_builder')
+   );
+  }
 
   /**
    * Returns two instances of the node form.