diff --git a/core/tests/Drupal/Tests/Core/Form/FormAjaxResponseBuilderTest.php b/core/tests/Drupal/Tests/Core/Form/FormAjaxResponseBuilderTest.php
index 48656b905ab2c27a12ed8a944d3ce62a43e95d15..3d4ff04143774104424fe1712fdc6472abe10c58 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormAjaxResponseBuilderTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormAjaxResponseBuilderTest.php
@@ -54,7 +54,6 @@ public function testBuildResponseNoTriggeringElement() {
     $form_state = new FormState();
     $commands = [];
 
-    $expected = [];
     $this->expectException(HttpException::class);
     $this->formAjaxResponseBuilder->buildResponse($request, $form, $form_state, $commands);
   }
@@ -73,7 +72,6 @@ public function testBuildResponseNoCallable() {
     $form_state->setTriggeringElement($triggering_element);
     $commands = [];
 
-    $expected = [];
     $this->expectException(HttpException::class);
     $this->formAjaxResponseBuilder->buildResponse($request, $form, $form_state, $commands);
   }