diff --git a/core/modules/simpletest/lib/Drupal/simpletest/Form/SimpletestResultsForm.php b/core/modules/simpletest/lib/Drupal/simpletest/Form/SimpletestResultsForm.php
index 80da517..844e9ef 100644
--- a/core/modules/simpletest/lib/Drupal/simpletest/Form/SimpletestResultsForm.php
+++ b/core/modules/simpletest/lib/Drupal/simpletest/Form/SimpletestResultsForm.php
@@ -9,12 +9,13 @@
 
 use Drupal\Core\ControllerInterface;
 use Drupal\Core\Database\Connection;
+use Drupal\Core\Form\FormInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Test results form for $test_id.
  */
-class SimpletestResultsForm extends SimpletestTestForm implements ControllerInterface {
+class SimpletestResultsForm implements FormInterface, ControllerInterface {
 
   /**
    * Associative array of themed result images keyed by status.
@@ -228,6 +229,12 @@ public function buildForm(array $form, array &$form_state, $test_id = NULL) {
   /**
    * {@inheritdoc}
    */
+  public function validateForm(array &$form, array &$form_state) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function submitForm(array &$form, array &$form_state) {
     $pass = $form_state['values']['filter_pass'] ? explode(',', $form_state['values']['filter_pass']) : array();
     $fail = $form_state['values']['filter_fail'] ? explode(',', $form_state['values']['filter_fail']) : array();
@@ -253,7 +260,9 @@ public function submitForm(array &$form, array &$form_state) {
       $form_state_execute['values'][$class] = 1;
     }
 
-    parent::submitForm($form_execute, $form_state_execute);
+    // Submit the simpletest test form to rerun the tests.
+    $simpletest_test_form = new SimpletestTestForm();
+    $simpletest_test_form->submitForm($form_execute, $form_state_execute);
     $form_state['redirect'] = $form_state_execute['redirect'];
   }