I don't mean to single you out, November, just your post nicely summed up some things. The thing is, I don't disagree with the general idea you're all saying, but that's not really the point. You also can't test fairly by giving everyone a different test. Are there some ways to make things more equal? Sure, giving a deaf person a test with oral components is clearly putting them at a disadvantage. If there is someone with a handicap which impedes their writing, and they need extra time, there are easy ways to handle that. But the point of tests is not to give someone "something they can pass." It's to test them.
If your friend (just speaking generally now, not responding to November's post) can build a car, and you want to test someone's ability to build a car, an easy test would be: make them build a car. It determines if the person can do what they are being "tested" on. But what if he wanted to work as a mechanic, and he needed to be able to report specifically what was wrong, order replacement parts, leave notes for other mechanics on what was wrong or being done... Then, there would be a different test, and the fact that he wouldn't do well on it doesn't change what was being tested. It wouldn't just be about "can he build a car".
In the case of the firefighters' test, there is no actual evidence that the test was unfair with respect to what it was supposed to be testing. Unless someone can tell me what the written and oral parts each covered, respectively, and how important those things are to determining someone's qualifications for a position, you can't say anything about the test. What they can say is that scientifically, minorities test lower. Regardless of the test, subject, how it's given, all of that. They test lower. The only way to "make that more fair", and the way that it is almost always done is to make the test easier so that more of them pass.
I think that that's more offensive. If you ignored the race of the people in this situation, the city would never even have had a problem to deal with. I think that saying you're going to "make something more fair" by making it easier for people who would usually not do well, that's unfair to them and to everyone who does well either way.
(Also, as a side note, I do think that the reason minorities test lower has to do with socio-economic status and education problems in our country. But the reasons behind it don't really change the fact that it's true.)