I just tried taking a religion test but couldn't make it through to the end. The choices were lousy, limited, and cliche. I wanted to find out how suitable I am for Christianity - but they didn't say anything about what "failure to complete" might mean.
It would not have been very valid anyway since I was having to fudge too many times in choosing one of their limited possibilities. The "Christian" answer was usually obvious but many times I cringed at the characterization it inferred.
I guess one thing it does say: I'm not a Christian in terms of the test-makers' definition.