An ideal rationality test would be perfectly specific: there would be no way to pass it other than being rational. We can't conveniently create such a test, but we can at least make it difficult to pass our tests by utilizing simple procedures that don't require rationality to implement.

Any 'game' in which the best strategies can be known and preset would then be ruled out. It's relatively easy to write a computer program to play poker (minus the social interaction). Same goes for blackjack. It takes rationality to create such a program, but the program doesn't need rationality to function.