That's not exactly the current airline/FAA philosophy, with the emphasis on CRM and pilot monitoring they've actually been telling us for a while that the PM should speak up like he normally would even on a checkride. If the PF end ups leaning on the PM too much then and only then will the examiner intervene and instruct to seat sub behave like a robot. Basically you're now allowed to get at least a little help from the PM.

That's for a third-part seat sub like a reserve pilot or someone who picked it up for pay. If the seat sub is an examiner, then you're going to get what you get.