diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 36b4c7bdf..46a5eabb1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,7 +5,6 @@ tests:
         - virtualenv env
         - source env/bin/activate
         - pip install -U pip wheel setuptools
-        - XDG_CACHE_HOME=/cache bash .travis.sh style
         - XDG_CACHE_HOME=/cache bash .travis.sh tests
     tags:
         - python3
diff --git a/src/pretix/multidomain/middlewares.py b/src/pretix/multidomain/middlewares.py
index 973911ca3..11518d83a 100644
--- a/src/pretix/multidomain/middlewares.py
+++ b/src/pretix/multidomain/middlewares.py
@@ -2,8 +2,9 @@ import time
 from urllib.parse import urlparse
 
 from django.conf import settings
-from django.contrib.sessions.middleware import \
-    SessionMiddleware as BaseSessionMiddleware
+from django.contrib.sessions.middleware import (
+    SessionMiddleware as BaseSessionMiddleware,
+)
 from django.core.cache import cache
 from django.core.exceptions import DisallowedHost
 from django.core.urlresolvers import set_urlconf
diff --git a/src/pretix/plugins/pretixdroid/views.py b/src/pretix/plugins/pretixdroid/views.py
index 0f9d86b30..46edfb21d 100644
--- a/src/pretix/plugins/pretixdroid/views.py
+++ b/src/pretix/plugins/pretixdroid/views.py
@@ -17,8 +17,9 @@ from django.views.generic import TemplateView, View
 from pretix.base.models import Checkin, Event, Order, OrderPosition
 from pretix.control.permissions import EventPermissionRequiredMixin
 from pretix.helpers.urls import build_absolute_uri
-from pretix.multidomain.urlreverse import \
-    build_absolute_uri as event_absolute_uri
+from pretix.multidomain.urlreverse import (
+    build_absolute_uri as event_absolute_uri,
+)
 
 logger = logging.getLogger('pretix.plugins.pretixdroid')
 API_VERSION = 3
diff --git a/src/tests/__init__.py b/src/tests/__init__.py
index 751676529..3414495eb 100644
--- a/src/tests/__init__.py
+++ b/src/tests/__init__.py
@@ -2,10 +2,9 @@ from django.db import DEFAULT_DB_ALIAS, connections
 from django.test.utils import CaptureQueriesContext
 
 
-# Inspired by /django/test/testcases.py
-# but copied over to work without the unit test module
-
 class _AssertNumQueriesContext(CaptureQueriesContext):
+    # Inspired by /django/test/testcases.py
+    # but copied over to work without the unit test module
     def __init__(self, num, connection):
         self.num = num
         super(_AssertNumQueriesContext, self).__init__(connection)