diff --git a/tox.ini b/tox.ini
index 5e69498..d53db33 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,7 +14,7 @@ setenv =
   NOSE_OPENSTACK_SHOW_ELAPSED=1
   PYTHONWARNINGS=default::DeprecationWarning
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/train}
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/test-requirements.txt
 commands = python manage.py test {posargs} --settings=zun_ui.test.settings
@@ -101,7 +101,7 @@ commands =
 [testenv:docs]
 basepython = python3
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/train}
   -r{toxinidir}/doc/requirements.txt
 commands=
   sphinx-build -W -b html doc/source doc/build/html