Where are you at?
Are you getting better or worse?
How do you know the answers to these question if you do not test yourself?
Testing yourself benchmarks where you are at. A test is not only a scantron done in school. A test can be anything that gets you out of your comfort zone. Test are meant to be challenging. Tests are meant to fail beginners and be easy for masters.
A test or examination is an assessment intended to measure a test-taker’s knowledge, skill, aptitude, physical fitness, or classification in many other topics.merriam webster
The point is not to pass or fail but to use the test as feedback for where you are.