diff --git a/tox.ini b/tox.ini
index 241e81b6b8..39f690d555 100644
--- a/tox.ini
+++ b/tox.ini
@@ -119,7 +119,7 @@ commands = {posargs}
 [testenv:docs]
 basepython = python3
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
   -r{toxinidir}/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
@@ -171,7 +171,7 @@ commands = bindep test doc
 [testenv:releasenotes]
 basepython = python3
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -W -E -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html