diff --git a/tox.ini b/tox.ini
index 88d0fa9a25..d302de839d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,7 @@ commands =
 [testenv:functional]
 setenv = OS_TEST_PATH=./neutron/tests/functional
 commands =
-  python setup.py testr --slowest --testr-args='{posargs}'
+  python -m neutron.openstack.common.lockutils python setup.py testr --slowest --testr-args='{posargs}'
 
 [tox:jenkins]
 sitepackages = True