diff --git a/django_walletpass/signals.py b/django_walletpass/signals.py
index 1b1951d..eea57e0 100644
--- a/django_walletpass/signals.py
+++ b/django_walletpass/signals.py
@@ -20,7 +20,7 @@ def delete_registration(
     notification_request=None,
     notification_result=None,
     **kwargs
-):
+):  # noqa: W0613
     if notification_result.status == APNS_RESPONSE_CODE.GONE:
         registration = Registration.objects.get(
             push_token=notification_request.device_token
diff --git a/django_walletpass/tests/main.py b/django_walletpass/tests/main.py
index 2e2801f..fee9d10 100644
--- a/django_walletpass/tests/main.py
+++ b/django_walletpass/tests/main.py
@@ -174,7 +174,7 @@ def test_send_notification_registration_gone(
 class SignalTestCase(TestCase):
     @mock.patch("django_walletpass.signals.Registration")
     @mock.patch("django_walletpass.signals.PASS_UNREGISTERED")
-    def test_delete_registration(self, PASS_UNREGISTERED_mock, registration_mock):
+    def test_delete_registration(self, pass_unregistered_mock, registration_mock):
         """signal handler must delete registration and trigger signal"""
         request_mock, response_mock = mock.Mock(), mock.Mock()
         response_mock.is_successful = False
@@ -187,7 +187,7 @@ def test_delete_registration(self, PASS_UNREGISTERED_mock, registration_mock):
         # Registration obj must be deleted
         registration_mock.objects.get.return_value.delete.assert_called_with()
         # Signal must be sent
-        PASS_UNREGISTERED_mock.send.assert_called()
+        pass_unregistered_mock.send.assert_called()
 
 
 class RegisterPassViewSetTestCase(APITestCase):