diff --git a/src/make_testdata.py b/src/make_testdata.py
index b78251098b..6cc415544b 100644
--- a/src/make_testdata.py
+++ b/src/make_testdata.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 import os
 import sys
+from datetime import datetime
 
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "pretix.settings")
 
diff --git a/src/pretix/base/models/event.py b/src/pretix/base/models/event.py
index 3f9f0a9938..83f491bb1a 100644
--- a/src/pretix/base/models/event.py
+++ b/src/pretix/base/models/event.py
@@ -1,5 +1,4 @@
 import uuid
-from datetime import datetime
 
 from django.conf import settings
 from django.core.exceptions import ValidationError
diff --git a/src/pretix/base/models/items.py b/src/pretix/base/models/items.py
index e11399dad1..15d90e6d29 100644
--- a/src/pretix/base/models/items.py
+++ b/src/pretix/base/models/items.py
@@ -1,6 +1,5 @@
 import sys
 import uuid
-from datetime import datetime
 from decimal import Decimal
 
 from django.db import models
diff --git a/src/pretix/base/models/vouchers.py b/src/pretix/base/models/vouchers.py
index 52ee1895c7..d1d60b982f 100644
--- a/src/pretix/base/models/vouchers.py
+++ b/src/pretix/base/models/vouchers.py
@@ -1,5 +1,4 @@
 import random
-from decimal import Decimal
 
 from django.core.exceptions import ValidationError
 from django.db import models
diff --git a/src/pretix/base/payment.py b/src/pretix/base/payment.py
index 0a72c0b1fa..83ec8c7719 100644
--- a/src/pretix/base/payment.py
+++ b/src/pretix/base/payment.py
@@ -3,7 +3,7 @@ from decimal import Decimal
 
 from django import forms
 from django.contrib import messages
-from django.db.models import Q, Sum
+from django.db.models import Sum
 from django.dispatch import receiver
 from django.forms import Form
 from django.http import HttpRequest
diff --git a/src/pretix/base/services/cart.py b/src/pretix/base/services/cart.py
index 5074d9c237..b8edaafa2b 100644
--- a/src/pretix/base/services/cart.py
+++ b/src/pretix/base/services/cart.py
@@ -5,7 +5,7 @@ from django.conf import settings
 from django.db.models import Q
 from django.utils.timezone import now
 from django.utils.translation import ugettext as _
-from typing import List, Optional, Tuple
+from typing import List, Optional
 
 from pretix.base.i18n import LazyLocaleException
 from pretix.base.models import (
diff --git a/src/pretix/base/services/invoices.py b/src/pretix/base/services/invoices.py
index 433d3d019f..8083196c95 100644
--- a/src/pretix/base/services/invoices.py
+++ b/src/pretix/base/services/invoices.py
@@ -9,7 +9,6 @@ from django.conf import settings
 from django.contrib.staticfiles import finders
 from django.core.files.base import ContentFile
 from django.db import transaction
-from django.utils import translation
 from django.utils.formats import date_format
 from django.utils.translation import pgettext, ugettext as _
 from reportlab.lib import pagesizes
diff --git a/src/pretix/base/services/orders.py b/src/pretix/base/services/orders.py
index 66d4717a6c..4d64234445 100644
--- a/src/pretix/base/services/orders.py
+++ b/src/pretix/base/services/orders.py
@@ -16,7 +16,7 @@ from pretix.base.models import (
 from pretix.base.models.orders import InvoiceAddress
 from pretix.base.payment import BasePaymentProvider
 from pretix.base.services.invoices import (
-    generate_cancellation, generate_invoice, invoice_pdf,
+    generate_cancellation, generate_invoice,
 )
 from pretix.base.services.mail import mail
 from pretix.base.signals import (
diff --git a/src/pretix/control/views/main.py b/src/pretix/control/views/main.py
index 590d3c2d71..3a30d25d5f 100644
--- a/src/pretix/control/views/main.py
+++ b/src/pretix/control/views/main.py
@@ -7,9 +7,7 @@ from django.utils.translation import ugettext_lazy as _
 from django.views.generic import CreateView, ListView, TemplateView
 
 from pretix.base.models import Event, EventPermission, OrganizerPermission
-from pretix.control.forms.event import (
-    EventCreateForm, EventCreateSettingsForm, EventSettingsForm,
-)
+from pretix.control.forms.event import EventCreateForm, EventCreateSettingsForm
 from pretix.control.permissions import OrganizerPermissionRequiredMixin
 
 
diff --git a/src/pretix/control/views/orders.py b/src/pretix/control/views/orders.py
index d68c2efb13..6c392b31bf 100644
--- a/src/pretix/control/views/orders.py
+++ b/src/pretix/control/views/orders.py
@@ -1,15 +1,14 @@
 from datetime import timedelta
 from itertools import groupby
 
-from django import forms
 from django.contrib import messages
 from django.core.urlresolvers import reverse
 from django.db.models import Q
 from django.http import Http404, HttpResponseNotAllowed
 from django.shortcuts import redirect, render
-from django.utils.functional import cached_property, lazy
+from django.utils.functional import cached_property
 from django.utils.timezone import now
-from django.utils.translation import gettext, ugettext_lazy as _
+from django.utils.translation import ugettext_lazy as _
 from django.views.generic import DetailView, ListView, TemplateView, View
 
 from pretix.base.i18n import language
diff --git a/src/pretix/control/views/vouchers.py b/src/pretix/control/views/vouchers.py
index 91dbeaa35a..73298f1bc6 100644
--- a/src/pretix/control/views/vouchers.py
+++ b/src/pretix/control/views/vouchers.py
@@ -1,5 +1,3 @@
-import copy
-
 from django.contrib import messages
 from django.core.urlresolvers import resolve, reverse
 from django.db import transaction
diff --git a/src/pretix/presale/urls.py b/src/pretix/presale/urls.py
index 794ed0c40d..8f7615878c 100644
--- a/src/pretix/presale/urls.py
+++ b/src/pretix/presale/urls.py
@@ -1,4 +1,4 @@
-from django.conf.urls import include, url
+from django.conf.urls import url
 
 import pretix.presale.views.cart
 import pretix.presale.views.checkout
diff --git a/src/pretix/presale/views/order.py b/src/pretix/presale/views/order.py
index 0daf80cd15..5f1b5371e2 100644
--- a/src/pretix/presale/views/order.py
+++ b/src/pretix/presale/views/order.py
@@ -1,7 +1,6 @@
 from datetime import timedelta
 
 from django.contrib import messages
-from django.core.exceptions import PermissionDenied
 from django.core.urlresolvers import reverse
 from django.http import Http404
 from django.shortcuts import redirect
diff --git a/src/pretix/settings.py b/src/pretix/settings.py
index 3d87400e1f..f69edd8ac5 100644
--- a/src/pretix/settings.py
+++ b/src/pretix/settings.py
@@ -194,7 +194,7 @@ MIDDLEWARE_CLASSES = [
 ]
 
 try:
-    import debug_toolbar
+    import debug_toolbar  # noqa
     if DEBUG:
         INSTALLED_APPS.append('debug_toolbar.apps.DebugToolbarConfig')
         MIDDLEWARE_CLASSES.append('debug_toolbar.middleware.DebugToolbarMiddleware')
diff --git a/src/setup.cfg b/src/setup.cfg
index f410fdc5e8..4ada48c62f 100644
--- a/src/setup.cfg
+++ b/src/setup.cfg
@@ -1,7 +1,7 @@
 [flake8]
 ignore = N802,W503,E402
 max-line-length = 160
-exclude = migrations,.ropeproject,static,mt940.py,_static,build,make_testdata.py,tests/settings.py
+exclude = migrations,.ropeproject,static,mt940.py,_static,build,make_testdata.py,tests/settings.py,pretix/base/models/__init__.py
 max-complexity = 11
 
 [isort]
diff --git a/src/tests/base/test_payment.py b/src/tests/base/test_payment.py
index 106a695ebe..cc40bb4a54 100644
--- a/src/tests/base/test_payment.py
+++ b/src/tests/base/test_payment.py
@@ -1,12 +1,10 @@
-import time
 from decimal import Decimal
 
 import pytest
 from django.utils.timezone import now
 from tests.testdummy.payment import DummyPaymentProvider
 
-from pretix.base.models import Event, EventLock, Organizer
-from pretix.base.services import locking
+from pretix.base.models import Event, Organizer
 
 
 @pytest.fixture
diff --git a/src/tests/base/test_settings.py b/src/tests/base/test_settings.py
index ecaec63a21..ef50b197ed 100644
--- a/src/tests/base/test_settings.py
+++ b/src/tests/base/test_settings.py
@@ -8,7 +8,7 @@ from django.utils.timezone import now
 
 from pretix.base import settings
 from pretix.base.i18n import LazyI18nString
-from pretix.base.models import Event, Organizer, OrganizerSetting, User
+from pretix.base.models import Event, Organizer, User
 from pretix.base.settings import SettingsSandbox
 
 
diff --git a/src/tests/base/test_templatetag.py b/src/tests/base/test_templatetag.py
index f0c92e22a0..1beea4809a 100644
--- a/src/tests/base/test_templatetag.py
+++ b/src/tests/base/test_templatetag.py
@@ -1,12 +1,5 @@
-import pytest
-from django.conf import settings
-from django.core.urlresolvers import NoReverseMatch
-from django.template import Context, Template, TemplateSyntaxError
+from django.template import Context, Template
 from django.test import RequestFactory
-from django.utils.timezone import now
-
-from pretix.base.models import Event, Organizer
-from pretix.multidomain.models import KnownDomain
 
 TEMPLATE_REPLACE_PAGE = Template("{% load urlreplace %}{% url_replace request 'page' 3 %}")
 
diff --git a/src/tests/multidomain/test_middlewares.py b/src/tests/multidomain/test_middlewares.py
index 859b9b9c75..9c3c4b9d71 100644
--- a/src/tests/multidomain/test_middlewares.py
+++ b/src/tests/multidomain/test_middlewares.py
@@ -1,6 +1,5 @@
 import pytest
 from django.conf import settings
-from django.http import Http404
 from django.test.utils import override_settings
 from django.utils.timezone import now