diff --git a/tox.ini b/tox.ini
index 80161ca..be8019f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ envlist = py35,py27,pep8
 [testenv]
 install_command = pip install {opts} {packages}
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+  -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt?h=stable/queens}
  -r{toxinidir}/test-requirements.txt
  -r{toxinidir}/requirements.txt
 # We want to support both vanilla stdlib and eventlet monkey patched