I looked up the test protocol. It's pretty lenient.
Two minutes' fire endurance time is kind of cute. For other life-safe components, we generally want fire endurances on the order of half an hour to two hours. But the stuff I design and build is more high-stakes engineering, not commodity wheeled vehicles where final cost is an issue. That said, the intent is clear: two minutes is enough time for people to get out of a vehicle and move to a safe distance.
From the practical perspective, yes, the heat loading from one ruptured fuel tank spreading its burning fuel load is within the realm of the test protocol. Under the presumption that manufacturers will build fuel tanks to only a small margin beyond the test heat load, we should expect fuel systems to be compromised within a small number of minutes. Under a heat profile where several fuel loads have been released and are now on fire, this would exceed the test heat load profile by a considerable factor.