diff --git a/tox.ini b/tox.ini
index 529f0ddc16..5ecfe69135 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ ignore_basepython_conflict=true
 basepython = python3
 deps =
   -r{toxinidir}/test-requirements.txt
-  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/yoga}
 usedevelop = True
 setenv = VIRTUAL_ENV={envdir}
          CEILOMETER_TEST_BACKEND={env:CEILOMETER_TEST_BACKEND:none}
@@ -38,7 +38,7 @@ commands =
 
 [testenv:releasenotes]
 deps =
-    -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+    -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/yoga}
     -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
@@ -47,7 +47,7 @@ commands = oslo-config-generator --config-file=etc/ceilometer/ceilometer-config-
 
 [testenv:docs]
 deps =
-  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/yoga}
   -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -b html doc/source doc/build/html
 setenv = PYTHONHASHSEED=0