@@ -646,7 +646,7 @@ function install_tempest {

 function install_tempest_plugins {

     pushd $TEMPEST_DIR

     if [[ $TEMPEST_PLUGINS != 0 ]] ; then

-        tox -evenv-tempest -- pip install $TEMPEST_PLUGINS

+        tox -evenv-tempest -- pip install -c $REQUIREMENTS_DIR/upper-constraints.txt $TEMPEST_PLUGINS

         echo "Checking installed Tempest plugins:"

         tox -evenv-tempest -- tempest list-plugins

     fi