diff --git a/tox.ini b/tox.ini
index 2f59e48..3f7e3af 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,7 +12,7 @@ setenv =
    VIRTUAL_ENV={envdir}
    PYTHONUNBUFFERED = 1
 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}/test-requirements.txt
    -r{toxinidir}/requirements.txt
 commands =
@@ -47,7 +47,7 @@ commands =
   npm install
   npm run {posargs:test}
 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}/requirements.txt
   -r{toxinidir}/test-requirements.txt
 [testenv:venv]