diff --git a/tox.ini b/tox.ini
index df838d7e..6d637061 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,7 +6,7 @@ skipsdist = True
 basepython = python3
 usedevelop = True
 deps =
-    -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+    -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/xena}
     -r{toxinidir}/test-requirements.txt
 
 passenv =
@@ -56,7 +56,7 @@ basepython = python3.6
 
 [testenv:docs]
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/xena}
   -r{toxinidir}/doc/requirements.txt
 whitelist_externals = rm
 commands =
@@ -87,7 +87,7 @@ ignore-path = .venv,.git,.tox,.tmp,*freezer/locale*,*lib/python*,freezer.egg*,do
 
 [testenv:releasenotes]:
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/xena}
   -r{toxinidir}/doc/requirements.txt
 whitelist_externals = rm
 commands =