I disagree with your testing theory. The signal from a degree isn't just that you know the content, but that you can consistently work towards a goal over many

I disagree with your testing theory. The signal from a degree isn't just that you know the content, but that you can consistently work towards a goal over many years, navigating a large organization with lots of arbitrary rules, and willingness to do assigned work that may serve no purpose. You can't test to show that ability.