[Answered ]-Psycopg2.errors.UndefinedTable: relation “exercises” does not exist – Django Testing

As I could see, the test with error is test_add_exercise_POST, and it’s because you start with an empty database in test enviroment, you can’t do Exercises.objects.values('exercise_id').order_by('-exercise_id')[0]['exercise_id'] + 1 inside add_exercise function, before creating test exercises objects and saving on test database.