The test is failing on some (unstable) buildbots:
http://buildbot.python.org/all/builders/AMD64%20Solaris%2011%20%5BSB%5D%203.x/builds/1598/steps/test/logs/stdio
"""
======================================================================
FAIL: test_invalid_handles (test.test_multiprocessing_fork.TestInvalidHandle)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/cpython/buildslave/cc-32/3.x.snakebite-solaris11-amd64/build/Lib/test/_test_multiprocessing.py",
line 2962, in test_invalid_handles
    self.assertRaises((ValueError, OSError), conn.poll)
AssertionError: (<class 'ValueError'>, <class 'OSError'>) not raised by poll
"""

Basically, this test checks that calling poll() on an invalid
Connection (invalid FD) raises an OSError.
That's true for select, kqueue and epoll, but not for poll(), which
returns POLLNVAL.
I'm not sure about what to do here.