My girls and I have all taken the test! But we have also "chosen" which house we want to belong in without regards to the test too! Most of us stuck with the house it chose for us, but it's just for fun, so I have told them to chose the house they feel the most "comfortable or connected" to. Noone is denied entry to any house! If you test as a Slytherin, but you like Ravenclaw....go ahead and embrace your Ravenclaw!