Lidl: Online AssessmentsWatch
I'm tempted to have a crack at it myself now just to see what it's like, not that I'd follow up on it if I happened to "pass", but it'd be interesting to see exactly what it is they're looking out for.
Lidl, Asda etc seem to include a lot of silly Americanised tests these days - they can't be too hard to pass judging by some of the clowns I've come across working in them so I'm taking a guess that they can be passed by sheer guesswork or luck. Maybe you're over thinking your answers? Or just something as simple as not paying enough attention to a few questions, I've done the same myself in tests (COSHH being a great one I almost flunked due to wanting to get out ASAP) instead of concentrating and taking my time.