@@ -673,7 +673,9 @@ function install_tempest {

 function install_tempest_plugins {

     pushd $TEMPEST_DIR

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

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

+        # The requirements might be on a different branch, while tempest & tempest plugins needs master requirements.

+        (cd $REQUIREMENTS_DIR && git show master:upper-constraints.txt) > u-c-m.txt

+        tox -evenv-tempest -- pip install -c u-c-m.txt $TEMPEST_PLUGINS

         echo "Checking installed Tempest plugins:"

         tox -evenv-tempest -- tempest list-plugins

     fi