JR 137
Grandmaster
So in other words, any student could test once they were eligible? By eligible, I'm assuming they met the minimum time in grade/number of classes.I see. Well the dojo where I did most of my training, tests were scheduled about every four months. It was ultimately up to the student if they wanted to test although the instructor might recommend against it or tell you that you're not ready. The point is, though, that just because it was up to the student if they wanted to test that didn't mean a student could test whenever they wanted. Tests were done every four months so that's when a student could test.
So long as it's an actual test where students fail if they haven't met the standards for their rank, I see no issues with it.