Dave Meltzer is reporting that one of the conditions in which WWE agreed to clear Bryan was that he'd see the WWE doctors and undergo impact testing and a neuropsychological evaluation after every match until WWE is comfortable that he's alright.
So, I imagine Bryan was tested after the main event segment on SmackDown Live this past Tuesday and, if this report is true, it'll probably happen every time he gets physical or takes a significant bump. Personally, I'm hoping Bryan eliminates the diving head butt from his arsenal and if he insists on doing a missile dropkick, maybe he should alter is so that he lands on his stomach.