In a pinch, that is probably sufficient.

But presumably the bomb has some mount and you would want to validate that and the bomb door/release mechanism. You probably also have some sort of targeting system, guidance control, arming system to integrate all which probably require some sort of validation.

You would probably also want certification to validate the operational characteristics of the aircraft carrying the bomb, e.g. range, flight performance, detection, capacity.

And seriously, it is a nuke, better safe than sorry. If you can test it ahead of time you do that.