I don't think it would be authoritarian to test voters before voting. What's authoritarian is when they can vote money out of the pockets of other people to give to themselves.
I'm not talking about anything partisan or very difficult in having voters take the test. It could be multiple choice. Questions like who is the speaker of the House? What party do they belong to? Who is the VP? What party do they belong to. Is the US in debt? If so, by how much: 100 billion, 1 trillion, 15 trillion, 31 trillion? What party leads the Senate? Just questions like that. The problem we have is Obama Phone ladies voting for Presidents.
Or let me use an analogy here: Let's say MLB decided that people of the city a team represents be allowed to pick their own players instead of the managers. In my city, they allow anybody to pick them. They could pick by race, by how cute they are, their accent or heritage, anything. In your city, people wanting to pick baseball players had to demonstrate an acute knowledge of the game and players. Now, which one of us will have the much better baseball team?
Donald Trump was an outstanding President by all measures, but he was rough around the edges. Now we have a dementia patient in charge of this country because Trump was crude, insulting at times, and posted abrasive Tweets. Forget how great the country was doing before covid. But that's how people voted; on personality instead of ability. That's the problem.