Ask HN: How do you interview testers?

We're hiring a semi-technical software tester. Not an SDET; they'll be expected to do a fair amount of manual testing, but also debug code with a decent level of understanding do a little ad-hoc automation. Have you hired for a position like this? If so, how did you interview them? I'm particularly interested in the type of skills tests you gave. (I get that a lot of companies frown upon manual testing or don't have positions like this. That's fair, but it's not the tack we're taking right now.)