If I were applying for jobs, I'd be dubious about one that required an explicit "test" as part of the interview process, since it's hard to know what you mean by "test". Are you going to test my typing speed, or whether I know obscure language trivia (quick: Where was Bjarne Stroustrup working when he invented C++? How do you pronounce "Bjarne Stroustrup"? What does "restrict" mean in C?), or whether it's really a standard interview in disguise.
A normal technical interview process really should be a "test", for all intents and purposes. It's fairly easy to put a candidate in front of a whiteboard and figure out whether the candidate can write a function in your language of choice. (At least, it's easier to test coding ability than many other professional jobs.)