1 files changed, 1 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index 542396a..1a97ce2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,7 +10,7 @@ setenv = VIRTUAL_ENV={envdir}
          TESTS_DIR=./ironicclient/tests/unit
 usedevelop = True
 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/newton} {opts} {packages}
 deps =
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt