Halon is pretty much banned for years now, other agents have been introduced. Sadly, making an actual full test of a gaseous extinguishing system (such as FM20

Halon is pretty much banned for years now, other agents have been introduced. Sadly, making an actual full test of a gaseous extinguishing system (such as FM200 or Novec 1230) can be prohibitively expensive (mainly costs of the "reloading" of the system with new gas). Those are just mostly tested for correct pressure in tanks and if the detection electronics are working fine, making an actual dump would be very impractical (evacuation of personnel, ventilating the room afterwards etc.)