unit tests taking focus on the desktop

[Terrence Enger]

All,

I notice that unit tests (UIT, it seems) are launching 
LibreOffice to take focus on the desktop.  I am running 
debian-buster and xfce desktop.

Is there a way to either
(*) send that user interface away somewhere, so that I can
    do other things in the desktop?
(*) make the tests continue after desktop locks, so  that
    I can go away to do other things?

Thanks for your attention,
Terry.