diff --git a/tests/codeception/config/functional.php b/tests/codeception/config/functional.php
index 499ad5a..6d22bd9 100644
--- a/tests/codeception/config/functional.php
+++ b/tests/codeception/config/functional.php
@@ -9,6 +9,17 @@ return yii\helpers\ArrayHelper::merge(
     require(__DIR__ . '/../../../config/web.php'),
     require(__DIR__ . '/config.php'),
     [
-
+        'components' => [
+            'request' => [
+                // it's not recommended to run functional tests with CSRF validation enabled
+                'enableCsrfValidation' => false,
+                // but if you absolutely need it set cookie domain to localhost
+                /*
+                'csrfCookie' => [
+                    'domain' => 'localhost',
+                ],
+                */
+            ],
+        ],
     ]
 );