diff --git a/core/modules/system/lib/Drupal/system/Tests/Form/FormTest.php b/core/modules/system/lib/Drupal/system/Tests/Form/FormTest.php
index 2ccc6c0..7903a2c 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Form/FormTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Form/FormTest.php
@@ -294,8 +294,8 @@ function testCheckboxProcessing() {
    * Tests validation of #type 'select' elements.
    */
   function testSelect() {
-    $form = $form_state = array();
-    $form = form_test_select($form, $form_state);
+    $form = array();
+    $form = \Drupal::formBuilder()->getForm('Drupal\form_test\Form\TestSelect');
     $error = '!name field is required.';
     $this->drupalGet('form-test/select');