TW ,
What I would check out for peace of mind is that the emergencies fittings are wired correctly , what I mean by that is they are wired locally off a phase(s) . Ie if you are fed by 3 phase you and your lighting is wired on different phases that the emergencies are distributed accordingly on said phases .
What you don't want to find is that your lighting is one phase and your emergencies are on another , so you could loose two incoming phases and have no emergencies kicking in when you need them.
Obviously if you are on a single phase you wont have the above problem , just need to look at the arrangement , so it might be better to turn off all your lighting breakers and see if your emergency fittings respond.
Then you can do a flick test as above and be totally confident.