Mac OS “sandbox” on Mac OS

I need to test some signing/notarization issues with Gatekeeper and I need a completely “new” and “fresh” system for that so that I can test the app like a completely new user. Is there an easier way for that than virtualizing a Mac on a Mac? I tried just creating a new user on my local machine, but it turns out the users share the certificates - means I can not test the issue this way since the app launches without issues because of the certificates and previous launching of the app.