diff --git a/tox.ini b/tox.ini
index ba10930..4917237 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py24,py25,py26,py27
+envlist = py24,py25,py26,py27, py31
 
 [testenv]
 commands=py.test --junitxml=junit-{envname}.xml