Flashcard test Cantonese instead?

I know you can change so they read in Cantonese instead of Mandarin when you want listen to sentences or just look at a flashcard but is there any way to use Cantonese instead of Mandarin when you do the flashcard test? I looked and looked but I can't find any settings for this, is it possible? If not, why?

Yes, that is indeed supported - set "primary pronunciation" to "Cantonese" in New Test / Display.