diff --git a/src/tests/base/test_vat_id_validation.py b/src/tests/base/test_vat_id_validation.py
index cd5386ee5..ba560f021 100644
--- a/src/tests/base/test_vat_id_validation.py
+++ b/src/tests/base/test_vat_id_validation.py
@@ -2,7 +2,9 @@ import pytest
 import responses
 from requests import Timeout
 
-from pretix.base.services.tax import VATIDTemporaryError, validate_vat_id, VATIDFinalError
+from pretix.base.services.tax import (
+    VATIDFinalError, VATIDTemporaryError, validate_vat_id,
+)
 
 
 def test_unknown_country():
diff --git a/src/tests/control/test_orders.py b/src/tests/control/test_orders.py
index 952c6a54a..92292dc12 100644
--- a/src/tests/control/test_orders.py
+++ b/src/tests/control/test_orders.py
@@ -42,8 +42,6 @@ from django.core import mail
 from django.utils.timezone import now
 from django_countries.fields import Country
 from django_scopes import scopes_disabled
-
-from pretix.base.services.tax import VATIDFinalError, VATIDTemporaryError
 from tests.base import SoupTest
 from tests.plugins.stripe.test_provider import MockedCharge
 
@@ -56,6 +54,7 @@ from pretix.base.payment import PaymentException
 from pretix.base.services.invoices import (
     generate_cancellation, generate_invoice,
 )
+from pretix.base.services.tax import VATIDFinalError, VATIDTemporaryError
 
 
 @pytest.fixture
diff --git a/src/tests/presale/test_checkout.py b/src/tests/presale/test_checkout.py
index e802d11dc..326b1f1db 100644
--- a/src/tests/presale/test_checkout.py
+++ b/src/tests/presale/test_checkout.py
@@ -47,7 +47,7 @@ from pretix.base.models.items import (
     ItemAddOn, ItemBundle, ItemVariation, SubEventItem, SubEventItemVariation,
 )
 from pretix.base.services.orders import OrderError, _perform_order
-from pretix.base.services.tax import VATIDTemporaryError, VATIDFinalError
+from pretix.base.services.tax import VATIDFinalError, VATIDTemporaryError
 from pretix.testutils.scope import classscope
 from pretix.testutils.sessions import get_cart_session_key