diff --git a/django/contrib/messages/views.py b/django/contrib/messages/views.py
index d08804aa1d..3c2ca355ba 100644
--- a/django/contrib/messages/views.py
+++ b/django/contrib/messages/views.py
@@ -1,8 +1,7 @@
-from django.views.generic.edit import FormMixin
 from django.contrib import messages
 
 
-class SuccessMessageMixin(FormMixin):
+class SuccessMessageMixin(object):
     """
     Adds a success message on successful form submission.
     """