diff --git a/tox.ini b/tox.ini
index 2eb9d65a6d..fba624452b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,7 @@ envlist = py37,pep8,api-ref,docs,genconfig,genpolicy,releasenotes,protection
 usedevelop = True
 basepython = python3
 setenv = VIRTUAL_ENV={envdir}
-deps = -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/ussuri}
        -r{toxinidir}/test-requirements.txt
        -r{toxinidir}/requirements.txt
        .[ldap,memcache,mongodb]
@@ -46,7 +46,7 @@ passenv = FAST8_NUM_COMMITS
 [testenv:bandit]
 # NOTE(browne): This is required for the integration test job of the bandit
 # project. Please do not remove.
-deps = -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/ussuri}
        -r{toxinidir}/requirements.txt
        .[bandit]
 commands = bandit -r keystone -x 'keystone/tests/*'
@@ -125,7 +125,7 @@ max-complexity=24
 
 [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/ussuri}
   -r{toxinidir}/doc/requirements.txt
   .[ldap,memcache,mongodb]
 commands=