Answer:
In general, you can be forced by the court to testify. When this is ordered, you will be sent a subpoena via hand delivery, direct communication, or email. The subpoena will state in detail what type of testimony is needed from you. Once you have been given the subpoena, you must legally oblige.
Step-by-step explanation:
I really don't think you should be forced to testify, because if you do get nervous with public speaking it could come off wrong and you would be in trouble for something you didn't do but yeah.
i took the test btw :)