The unit tests take too long, and they take even longer (twice as long) on Brian's laptop with its OS X full-disk encryption. I just snapped and announced that I'll give anybody 50ⓑ if they put a substantial dent in this problem. Here are the juicy details: https://tahoe-lafs.org/trac/tahoe-lafs/ticket/20#comment:13 Regards, Zooko