I know a lot about tests and don't like them. All have limitations and few are administered by people who know what they are doing.
My cynicism started when I was a young teacher and I was required to set National Foundation for Educational Research tests. Marks were awarded only for answers conforming to the supplied list and no original thinking was rewarded. I wondered whether the psychologist who set the test envisaged any kind of thinking other than his own could be possible. For example, on the front of the answer booklet, the pupil was asked to write their name and then answer the question, "Are you a boy or a girl?" The only correct answer is, of course , "Yes".
Another favourite was, "If you were at a match between Arsenal and Chelsea, what would you be doing?" Supplied answer - Watching Football. How I longed to award a bonus point to the boy who wrote "fightin"!