A loyalty test doesn't have to be overt asking someone if they're a White Nationalist, and it's better not to do that because that is something infiltrators can easily bypass.

The most exclusive underground White Nationalist groups require you to kill a politician, a Fed, their kids, or a foreign national that is a threat to Whites that they have captured and if you don't do it, you get killed instead. Even if they were an infiltrator, if they pass the test then they're committed to White Nationalism from then onward.

But you can have other things to provoke a reaction and see if they speak up against anti-White things. If they do they get a promotion, if not you fire them and blackball them from the industry because when it came down to it they wouldn't do the right thing.

Any White Nationalist in control of any institution should do this. It's a simple way to ensure the institution isn't hijacked by anti-Whites since everyone in the leadership positions will function autonomously for White interests.