Is it possible to reset the App Store Country while testing InApp purchase in Xcode?

I'm testing InApp purchases in Xcode for a MacOS app.
In App Store Connect, I've created several tester accounts, each with a different country.
When I launch my app, and connect with a tester account, the App Store always returns the InApp product localized from a specific previous tester account.
So, the App Store is stuck with that country.
I know it's a cache thing, because on another computer, the App Store switches to the correct country when changing tester accounts.
Any idea how to reset the App Store, or its country ?