Did Clemenza really pass the loyalty test? though or
Perhaps Clemenza was just lucky! by sitting tight and doing nothing because he was not losing his territories, got away with it? ie: Clemenza's loyalty was not tested?
Choosing to do nothing is an active, conscious decision. Michael asked both to be patient. Clem was patient, so he did what Michael told him to do. That showed loyalty.
No doubt it is easy to be patient and do nothing, when not losing his territories like Tessio Let off the hook
