diff --git a/tox.ini b/tox.ini
index fb69d64..0de729d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,8 @@ envlist = docs,linters,functional
 [testenv]
 usedevelop = False
 install_command =
-    pip install -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt?h=stable/queens} {opts} {packages}
+    pip install -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master} {opts} {packages}
+
 deps =
     -r{toxinidir}/test-requirements.txt
 commands =