But testing does not teach you any English. Get a homework assignment . The subject of the composition will usually be something that you don't care about. Doing boring things is not going to help your English. It will only decrease your motivation.
Most teachers completely ignore it, sometimes because their own pronunciation is bad.
Some teachers will correct your mistakes when you speak. But very few teachers tell you how you can avoid making the same mistakes again. Very few teachers tell you about the sounds of English and how to use a dictionary to learn about the pronunciation of words. They will just do their textbook and the exercises in it. If your teacher is different, you are lucky.