Since test anxiety already comes with a certain expectation of an exam situation, using self-tests not only helps your knowledge level. It has a double advantage especially in case of fear of exams. First, knowledge and what has been learned is put to a strong test in a self-test or a fictitious exam situation.
In addition, the regular repetition of the exam shows the brain that this is something supposedly commonplace. The more often self-tests are taken, the more the brain becomes accustomed to the testing situation. In addition, with each improvement in the results, the self-confidence and the realistic, own assessment of the affected person increase.