diff --git a/core/tests/Drupal/Tests/Core/Render/Element/MachineNameTest.php b/core/tests/Drupal/Tests/Core/Render/Element/MachineNameTest.php
index d7d2303..f8948c7 100644
--- a/core/tests/Drupal/Tests/Core/Render/Element/MachineNameTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/Element/MachineNameTest.php
@@ -51,8 +51,6 @@ public function providerTestValueCallback() {
    * @covers ::processMachineName
    */
   public function testProcessMachineName() {
-    /** @var \Drupal\Core\Form\FormStateInterface $form_state */
-    // $form_state = $this->prophesize(FormStateInterface::class)->reveal();
     $form_state = new FormState();
 
     $element = [