diff -u b/core/tests/Drupal/Tests/Core/Render/Element/WeightTest.php b/core/tests/Drupal/Tests/Core/Render/Element/WeightTest.php
--- b/core/tests/Drupal/Tests/Core/Render/Element/WeightTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/Element/WeightTest.php
@@ -4,7 +4,7 @@
 
 use Drupal\Core\Form\FormState;
 use Drupal\Core\Render\Element\Weight;
-use Drupal\Tests\token\Kernel\KernelTestBase;
+use Drupal\KernelTests\KernelTestBase;
 
 /**
  * @coversDefaultClass \Drupal\Core\Render\Element\Weight
@@ -13,6 +13,21 @@
 class WeightTest extends KernelTestBase {
 
   /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['system'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->installConfig(['system']);
+  }
+
+  /**
    * Test existing #default_value value in #options list.
    *
    * @covers ::processWeight