What coping mechanisms have you tried for tests in the past? Have any of them worked for you?

Echoing what a few folks have already said, chatting with your family doctor and/or a therapist would be the right way to go to try and address the more deeply rooted anxieties.

You can also see if there are any groups being run by your local community health centre (CHC) or closest CMHA branch — these are usually for free. If you can do a group like MBSR (mindfulness based stress reduction), DBT skills (Dialectical Behaviour Therapy), or even a CBT (Cognitive Behaviour Therapy) group, those will all probably be of benefit to you.

Personally, I’ve found parasympathetic breathing (deep inhales, long exhales) really helpful. I’ve also found “Checking the Facts” (a DBT skill) useful too insofar as reminding myself that I’m a competent driver and if I make a mistake on a test it’s not necessarily reflective of my skills. Both of those (plus other really useful skills) can be found here: https://youtube.com/@DBTRU?si=cb48EFPbyNLJ4vlV