diff --git a/tox.ini b/tox.ini
index 7f0d36e4..54f0cc2e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = {py27,py35,pypy,pypy3}-{mg27,mg28,mg30}
+envlist = {py27,py35,pypy,pypy33-52-alpha1}-{mg27,mg28,mg30}
 
 [testenv]
 commands =