diff --git a/tox.ini b/tox.ini
index 168c0525..00481c07 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,11 @@ stxdir = {toxinidir}/..
 # Note: STX_DC_CLIENT is set by zuul to be distcloud-client, it is
 # defaulted here to the path that works in developer environments
 [testenv]
-install_command = pip install -U {opts} {packages}
+install_command = pip install \
+    -v -v -v \
+    -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/stable/stein/upper-constraints.txt}  \
+    -U {opts} {packages}
+
 setenv = VIRTUAL_ENV={envdir}
          OS_STDOUT_CAPTURE=1
          OS_STDERR_CAPTURE=1