The run_tempest.sh script's TEMPESTCONF_OVERRIDES environment variable isn't properly handled when it contains embedded quotes. Consider an override to configure the volume.vendor_name to "Vendor X"

TEMPESTCONF_OVERRIDES='volume.vendor_name "Vendor X" ...'

The variable is then used as follows:

discover-tempest-config ${TEMPESTCONF_ARGS} ${TEMPESTCONF_OVERRIDES}

However, the shell mangles the quotes and the following command is what's actually executed:

discover-tempest-config --create --debug volume.vendor_name '"Vendor' 'X"' ...

"Vendor X" (a single string) is mangled to '"Vendor' 'X"' (two separate strings).