The problem is not about the tests but the long working hours. Do not give your time for free, the company just gets used to it and they will fire you the same

The problem is not about the tests but the long working hours. Do not give your time for free, the company just gets used to it and they will fire you the same when they do not need you anymore, or you get personal responsibility that don't allow you to work for so long. When you get a better job then think about tests. Your health is first.