Eli Zaretskii <eliz@gnu.org> writes:

Hi Eli,

> Does the above fit the bill?  If not, what else is needed for the
> mock-up method?

I have tried the following patch. It still runs as expected on my
GNU/Linux machine. Could you pls check for MS Windows?

If it works there, I'll commit to the emacs-26 branch (and similar
patches for filenotify-tests.el and tramp-tests.el).