[ajuc]

There's a difference between personality test taken because you're curious, and one taken as a filter on the way to get a job. Usually you can guess where the authors of the test are going with the questions and which answers are "a better fit". And then it becomes a test of "how much you want this job" vs "how strongly you feel about being honest".

Also even if people answer honestly the science behind it is very shaky and when applied to real world situations it seems about as useful as astrology.