diff --git a/conntrackt/tests/helpers.py b/conntrackt/tests/helpers.py
--- a/conntrackt/tests/helpers.py
+++ b/conntrackt/tests/helpers.py
@@ -137,7 +137,7 @@ class PermissionTestMixin(object):
             view = self.view_class.as_view()
         elif self.view_function:
             view = self.view_function
-        
+
         # Verify that permission is denied.
         args = self.permission_test_view_args
         kwargs = self.permission_test_view_kwargs