diff --git a/tox.ini b/tox.ini
index a72aea21..5dd36c36 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,7 +2,7 @@
 # depends on some external libraries that aren't released yet.
 
 [tox]
-envlist = py27,py33
+envlist = py27,py33,py34
 
 [testenv]
 commands =