diff --git a/src/pretix/base/services/cross_selling.py b/src/pretix/base/services/cross_selling.py
index 8845817562..c17c8fb40b 100644
--- a/src/pretix/base/services/cross_selling.py
+++ b/src/pretix/base/services/cross_selling.py
@@ -196,9 +196,8 @@ class CrossSellingService:
                             var.original_price = var.original_price or var.display_price
                             previous_price = var.display_price
                             new_price = (
-                                    previous_price * (
-                                    (Decimal('100.00') - discount_rule.benefit_discount_matching_percent) / Decimal(
-                                '100.00'))
+                                previous_price * (
+                                    (Decimal('100.00') - discount_rule.benefit_discount_matching_percent) / Decimal('100.00'))
                             )
                             var.display_price = new_price
 
diff --git a/src/tests/base/test_cross_selling.py b/src/tests/base/test_cross_selling.py
index c9ec6cac4a..eb7ef58bd8 100644
--- a/src/tests/base/test_cross_selling.py
+++ b/src/tests/base/test_cross_selling.py
@@ -28,7 +28,6 @@ import pytest
 from django.utils.timezone import now
 from django_scopes import scopes_disabled
 from freezegun import freeze_time
-
 from tests import assert_num_queries
 
 from pretix.base.models import CartPosition, Discount, Event, Organizer