This appears to be the relevant section of your motor vehicles inspection requirements. Scroll down to point 8 and you'll see "Glazing and Windshield Wiper(s)." The following appear to be the critical requirements:
540 CMR 4.00
4.04 Procedures for Inspection of Non-Commercial Motor Vehicles (continued)
(a) Windshield Critical Viewing Area is the area covered by the sweep
of the wiper(s) exclusive of the outer two inches within the perimeter
of the wiper(s) sweep, provided by the vehicle manufacturer.
(b) Windshields having any of the following defects will be rejected:
[... snip ...]
Wiper scrape(s) in excess of 1/4 inch wide within the critical
[... snip ...]
(d) Windshield Wiper(s). Test for proper operation. If the vehicle was
equipped with two wipers, as furnished by the manufacturer, both must
be maintained in good working order. Wiper blades must properly
contact the windshield and, be of the same length as those furnished
as original equipment. The rubber elements shall be free from damage
It's perfectly reasonable to ask why they're failing the windshield wipers; i.e., which point are they failing?
From reading those requirements, I have to say that they sound like a good idea: your wipers should wipe enough of the windshield to see out. If they're legitimately bad, go to Walmart (or equivalent) and get some new blades. Quite often, they have the rubber cut-to-length inserts that you can slide on for cheap. I can say with near certainty that that option will be cheaper than dealer blades.