diff --git a/src/pretix/base/__init__.py b/src/pretix/base/__init__.py
index ccd0c9262..0ce14216d 100644
--- a/src/pretix/base/__init__.py
+++ b/src/pretix/base/__init__.py
@@ -16,4 +16,5 @@ class PretixBaseConfig(AppConfig):
         except ImportError:
             pass
 
+
 default_app_config = 'pretix.base.PretixBaseConfig'
diff --git a/src/pretix/base/signals.py b/src/pretix/base/signals.py
index 324b05797..ba2b4d2c2 100644
--- a/src/pretix/base/signals.py
+++ b/src/pretix/base/signals.py
@@ -51,6 +51,7 @@ class EventPluginSignal(django.dispatch.Signal):
                     responses.append((receiver, response))
         return responses
 
+
 register_payment_providers = EventPluginSignal(
     providing_args=[]
 )
diff --git a/src/pretix/control/__init__.py b/src/pretix/control/__init__.py
index 94e7d9351..b7c6dd298 100644
--- a/src/pretix/control/__init__.py
+++ b/src/pretix/control/__init__.py
@@ -9,4 +9,5 @@ class PretixControlConfig(AppConfig):
         from .views import dashboards  # noqa
         from . import logdisplay  # noqa
 
+
 default_app_config = 'pretix.control.PretixControlConfig'
diff --git a/src/pretix/multidomain/__init__.py b/src/pretix/multidomain/__init__.py
index b051cac35..92bad9922 100644
--- a/src/pretix/multidomain/__init__.py
+++ b/src/pretix/multidomain/__init__.py
@@ -5,4 +5,5 @@ class PretixMultidomainConfig(AppConfig):
     name = 'pretix.multidomain'
     label = 'pretixmultidomain'
 
+
 default_app_config = 'pretix.multidomain.PretixMultidomainConfig'
diff --git a/src/pretix/plugins/checkinlists/__init__.py b/src/pretix/plugins/checkinlists/__init__.py
index e017d7a98..d0fb5bdbd 100644
--- a/src/pretix/plugins/checkinlists/__init__.py
+++ b/src/pretix/plugins/checkinlists/__init__.py
@@ -27,4 +27,5 @@ class CheckinlistsApp(AppConfig):
             errs.append("Python package 'reportlab' is not installed.")
         return errs
 
+
 default_app_config = 'pretix.plugins.checkinlists.CheckinlistsApp'
diff --git a/src/pretix/plugins/paypal/__init__.py b/src/pretix/plugins/paypal/__init__.py
index 5c73ac7d8..f8add5af4 100644
--- a/src/pretix/plugins/paypal/__init__.py
+++ b/src/pretix/plugins/paypal/__init__.py
@@ -27,4 +27,5 @@ class PaypalApp(AppConfig):
             errs.append("Python package 'paypalrestsdk' is not installed.")
         return errs
 
+
 default_app_config = 'pretix.plugins.paypal.PaypalApp'
diff --git a/src/pretix/plugins/reports/__init__.py b/src/pretix/plugins/reports/__init__.py
index ffb4de6c8..1ac33c131 100644
--- a/src/pretix/plugins/reports/__init__.py
+++ b/src/pretix/plugins/reports/__init__.py
@@ -27,4 +27,5 @@ class ReportsApp(AppConfig):
             errs.append("Python package 'reportlab' is not installed.")
         return errs
 
+
 default_app_config = 'pretix.plugins.reports.ReportsApp'
diff --git a/src/pretix/plugins/ticketoutputpdf/__init__.py b/src/pretix/plugins/ticketoutputpdf/__init__.py
index 3a133d918..c4fac374d 100644
--- a/src/pretix/plugins/ticketoutputpdf/__init__.py
+++ b/src/pretix/plugins/ticketoutputpdf/__init__.py
@@ -27,4 +27,5 @@ class TicketOutputPdfApp(AppConfig):
             errs.append("Python package 'reportlab' is not installed.")
         return errs
 
+
 default_app_config = 'pretix.plugins.ticketoutputpdf.TicketOutputPdfApp'