diff --git a/tsconfig/tsconfig/tox.ini b/tsconfig/tsconfig/tox.ini
index 97466c1a..c0005cab 100644
--- a/tsconfig/tsconfig/tox.ini
+++ b/tsconfig/tsconfig/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py37,cover
+envlist = py27,py36,cover
 minversion = 2.3.2
 
 [testenv]
@@ -12,7 +12,7 @@ setenv = VIRTUAL_ENV={envdir}
 usedevelop = True
 install_command = pip install {opts} {packages}
 
-deps = -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/upper-constraints.txt}
+deps = -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/stable/stein/upper-constraints.txt}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt