diff --git a/app/tests/Controller/User/RegisterUserActionTest.php b/app/tests/Controller/User/RegisterUserActionTest.php
index a053c03..deda183 100644
--- a/app/tests/Controller/User/RegisterUserActionTest.php
+++ b/app/tests/Controller/User/RegisterUserActionTest.php
@@ -99,8 +99,14 @@ class RegisterUserActionTest extends TestCase
             UserRepositoryInterface::class, 
             $userRepository->reveal()
         );
+        
+        // get the form key
+        $getUserRequest = $this->createNewUserRequestForFormKey();
+        $response = $app->handle($getUserRequest);
+        $formKey = $container->get(SessionInterface::class)->get("form_key");
+        $this->assertIsString($formKey);
 
-        $request = $this->createNewUserRequest();
+        $request = $this->createNewUserRequest($formKey);
 
         $response = $app->handle($request);
         $this->assertEquals(400, $response->getStatusCode());