diff --git a/tox.ini b/tox.ini
index 1f44aa2..85b3880 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ usedevelop = True
 setenv =
     VIRTUAL_ENV={envdir}
 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
 
@@ -35,7 +35,7 @@ commands = {posargs}
 [testenv:buildimage]
 commands = {toxinidir}/bin/manila-image-create {posargs}
 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
 passenv = *
 allowlist_externals =