With the latest patch, test_time passes.

>>> time.mktime((-100, 1, 10) + (0,)*6)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OverflowError: mktime argument out of range
>>> time.mktime((-100, 1, 10) + (0,)*6)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OverflowError: mktime argument out of range
>>> time.mktime((1900, 1, 10) + (0,)*6)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OverflowError: mktime argument out of range
>>> time.mktime((1930, 1, 10) + (0,)*6)
-1261497600.0
>>> time.mktime((1969,12,31, 23,59,59, 0,0,0))
28799.0