The best way to test your knowledge is to apply it in the most appropriate way. For example, a theoretical knowledge doesn’t make one a good surgeon, engineer or whatever. One has to practically demonstrate his skills to prove them.
Similarly, religious knowledge is of no use at all if it isn’t put into practice. You would be more responsible for your plight on The Day if you are found to have known something, but failed to implement it.
May Allaah save us from His wrath and call us back to him when He is pleased with us (Ameen)