diff --git a/tox.ini b/tox.ini
index 2373002..3e7a1ab 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,10 +25,18 @@ deps =
   south
   django==1.6
 
+[testenv:py27-dj17]
+basepython = python2.7
+deps =
+  south
+  django==1.7rc2
+
+;south 1.0 is not python3 compatible, 0.8.4 was:
+;http://stackoverflow.com/questions/24529618/why-does-django-south-1-0-use-iteritems
 [testenv:py33-dj16]
 basepython = python3.3
 deps =
-  south
+  south==0.8.4
   django==1.6
 
 [testenv]