diff --git a/tox.ini b/tox.ini
index e2a8dcf..c63c93d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py25,py26,py27
+envlist = py25,py26,py27,py32,py33
 
 [testenv]
 commands = pip install --use-mirrors -q -r dev-requirements.txt