diff --git a/tests/storage/dav/servers/skip/__init__.py b/tests/storage/dav/servers/skip/__init__.py
index c3d2c39..0c8b392 100644
--- a/tests/storage/dav/servers/skip/__init__.py
+++ b/tests/storage/dav/servers/skip/__init__.py
@@ -1,5 +1,6 @@
 import pytest
 
+
 class ServerMixin(object):
 
     @pytest.fixture