Yes, that was my point. Driving tests for humans are awful, mostly because we expect humans to only become better with experience. But with a self driving system such an expectation would be misplaced.

You'd need a driving test that has sufficiently many difficult situations, hopefully somewhat randomized (so that the cars aren't just trained for this cycle), and in various weather/environmental/situational conditions (snow, ice, rain, desert, dark/light, partially broken street lighting, oncoming traffic with broken headlights, etc.)