There is a problem with test_pwd on 64-bit platform. It expects KeyError on pwd.getpwuid(sys.maxsize). Actually the test is not looks robust. On 32-bit platform sys.maxsize = 2**31-1 < 2**32 and this value only by chance was not in the user database. On 64-bit platform sys.maxsize > 2**32 and in old code it was wrapped to 2**31-1 C unsigned int value and this value only by chance was not in the user database. New code doesn't wrap the value to C unsigned int and raises an overflow exception.

What should I change, a test or a raised exception?