With the patch, the results are:

ERROR: test_ctime (test.test_time.TimeTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dje/src/cpython/Lib/test/test_time.py", line 239, in test_ctime
    self.assertEqual(time.ctime(testval)[20:], str(year))
OverflowError: ctime() timestamp argument out of range

======================================================================
FAIL: test_mktime_error (test.test_time.TimeTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dje/src/cpython/Lib/test/test_time.py", line 371, in test_mktime_error
    self.assertEqual(time.strftime('%Z', tt), tzname)
AssertionError: 'LMT' != 'PST'
- LMT
+ PST

which is what I would expect based on the patch and the new AIX-specific error message. What did you expect?