diff --git a/tox.ini b/tox.ini
index febcc6999d..5515826dc9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ whitelist_externals = find
                       make
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-install_command = pip install -U {opts} {packages}
+install_command = pip install -c https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt -U {opts} {packages}
 usedevelop = True
 commands =
   find . -type f -name "*.pyc" -delete