diff --git a/src/pretix/control/views/event.py b/src/pretix/control/views/event.py
index c21e08bfdc..40dc45fb3b 100644
--- a/src/pretix/control/views/event.py
+++ b/src/pretix/control/views/event.py
@@ -53,8 +53,8 @@ from pretix.multidomain.urlreverse import get_domain
 from pretix.plugins.stripe.payment import StripeSettingsHolder
 from pretix.presale.style import regenerate_css
 
-from . import CreateView, PaginationMixin, UpdateView
 from ..logdisplay import OVERVIEW_BLACKLIST
+from . import CreateView, PaginationMixin, UpdateView
 
 
 class EventSettingsViewMixin:
diff --git a/src/pretix/control/views/orders.py b/src/pretix/control/views/orders.py
index 1b133cab47..352de83a86 100644
--- a/src/pretix/control/views/orders.py
+++ b/src/pretix/control/views/orders.py
@@ -12,8 +12,8 @@ from django.contrib import messages
 from django.core.files import File
 from django.db import transaction
 from django.db.models import (
-    Count, IntegerField, OuterRef, ProtectedError, Q, Subquery,
-    Sum)
+    Count, IntegerField, OuterRef, ProtectedError, Q, Subquery, Sum,
+)
 from django.http import (
     FileResponse, Http404, HttpResponseNotAllowed, JsonResponse,
 )
diff --git a/src/pretix/presale/views/waiting.py b/src/pretix/presale/views/waiting.py
index 8649a5787f..25468f5211 100644
--- a/src/pretix/presale/views/waiting.py
+++ b/src/pretix/presale/views/waiting.py
@@ -12,9 +12,9 @@ from pretix.base.templatetags.urlreplace import url_replace
 from pretix.multidomain.urlreverse import eventreverse
 from pretix.presale.views import EventViewMixin
 
-from . import allow_frame_if_namespaced
 from ...base.models import Item, ItemVariation, WaitingListEntry
 from ..forms.waitinglist import WaitingListForm
+from . import allow_frame_if_namespaced
 
 
 @method_decorator(allow_frame_if_namespaced, 'dispatch')