diff --git a/tox.ini b/tox.ini
index 1dfa2f629f..2c6838bd77 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,6 @@ envlist = py26,py27,pep8
 
 [testenv]
 setenv = VIRTUAL_ENV={envdir}
-         EVENTLET_NO_GREENDNS=yes
          NOSE_WITH_OPENSTACK=1
          NOSE_OPENSTACK_COLOR=1
          NOSE_OPENSTACK_RED=0.05