diff --git a/cas_server/models.py b/cas_server/models.py
index 662e2c9..83433a5 100644
--- a/cas_server/models.py
+++ b/cas_server/models.py
@@ -81,7 +81,7 @@ class User(models.Model):
         for ticket_class in ticket_classes:
             queryset = ticket_class.objects.filter(user=self)
             for ticket in queryset:
-                ticket.logout(request, session, async_list)
+                ticket.logout(session, async_list)
             queryset.delete()
         for future in async_list:
             if future:
@@ -415,7 +415,7 @@ class Ticket(models.Model):
                         logger.warning("Error durring SLO %s" % error)
                         sys.stderr.write("%r\n" % error)
 
-    def logout(self, request, session, async_list=None):
+    def logout(self, session, async_list=None):
         """Send a SLO request to the ticket service"""
         # On logout invalidate the Ticket
         self.validate = True
diff --git a/cas_server/tests/utils.py b/cas_server/tests/utils.py
index 6783eea..162269d 100644
--- a/cas_server/tests/utils.py
+++ b/cas_server/tests/utils.py
@@ -54,6 +54,7 @@ def get_user_ticket_request(service):
 
 
 def get_validated_ticket(service):
+    """Return a tick that has being already validated. Used to test SLO"""
     (ticket, auth_client) = get_user_ticket_request(service)[1:3]
 
     client = Client()