diff --git a/tox.ini b/tox.ini
index 4c49b6a2..72f641f9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-minversion = 1.6
+minversion = 2.0
 skipsdist = True
 envlist = pep8,py27
 
@@ -33,6 +33,7 @@ commands =
   openstack-doc-test --check-syntax
 
 [testenv:docs]
+basepython=python2
 deps = sphinx
        {[testenv:checkniceness]deps}
 whitelist_externals = /bin/rm