That said, the diagnostic is in NO way a indicator of the score you will receive on test day. There is a lot of bad advice on the internet that says things like, "realistically you can expect to only score 7 or so points higher than your diagnostic". This advice is complete nonsense and should be disregarded. I'd say take the diagnostic just to get a feel for the LSAT, but do not put weight into the score. Almost everyone bombs the LSAT the first time around, it is exactly the reason why you study for it and do NOT take it cold.