Literacy tests, no, because they are elitist... (yes, I can name all the members of the supreme court, but I'll be damned if I could tell you the name of the acting governor of NJ...
... in my delusional maleficent world, I'd like to see an 'issues' test. That before you vote, you have to be aware of what you are voting for, if nothig else it would get rid of the problem of voting across party lines, and it would also make the candidates, I would hope, more accountable for getting their platforms out to the public rather than just saying what the other candidate isn't doing.