diff --git a/rest_framework/viewsets.py b/rest_framework/viewsets.py
index a39a7665c..1c56f61e8 100644
--- a/rest_framework/viewsets.py
+++ b/rest_framework/viewsets.py
@@ -201,7 +201,7 @@ class ViewSetMixin:
                 namespace = self.request.resolver_match.namespace
                 if namespace:
                     url_name = '%s:%s' % (namespace, url_name)
-                
+
                 url = reverse(url_name, self.args, self.kwargs, request=self.request)
                 view = self.__class__(**action.kwargs)
                 action_urls[view.get_view_name()] = url