diff --git a/tox.ini b/tox.ini
index a61a5b5b..1d84f7cc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,7 @@ whitelist_externals = bash
                       find
                       rm
 install_command =
-    {toxinidir}/tools/tox_install.sh {env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt} {opts} {packages}
+    {toxinidir}/tools/tox_install.sh {env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt?h=stable/pike} {opts} {packages}
 deps = .[influxdb,cassandra]
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt