diff --git a/tox.ini b/tox.ini
index 879122a5258..8a853c3b56d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist = docs,py34,py27,pep8
-minversion = 2.0
+minversion = 2.3
 skipsdist = True
 
 [testenv]
@@ -24,9 +24,8 @@ basepython = python2.7
 passenv = {[testenv]passenv} TEMPEST_CONFIG_DIR
 setenv = {[testenv]setenv}
          OS_TEST_PATH=./neutron/tests/api
+         TEMPEST_CONFIG_DIR={env:TEMPEST_CONFIG_DIR:/opt/stack/tempest/etc}
          OS_TEST_API_WITH_REST=1
-# If you are running the tests locally you should set the env variable
-# TEMPEST_CONFIG_DIR=/opt/stack/tempest/etc
 
 [testenv:api-constraints]
 basepython = {[testenv:api]basepython}