Down to 1 failure:

FAILED (failures=1)
test test_importlib failed -- Traceback (most recent call last):
  File "/Users/cartman/Python-
3.1b1/Lib/importlib/test/source/test_abc_loader.py", line 271, in 
test_lacking_parent
    self.verify_bytecode(mock, name)
  File "/Users/cartman/Python-3.1b1/Lib/importlib/test/source/util.py", 
line 18, in wrapper
    to_return = fxn(*args, **kwargs)
  File "/Users/cartman/Python-
3.1b1/Lib/importlib/test/source/test_abc_loader.py", line 253, in 
verify_bytecode
    self.assertIn(name, mock.module_bytecode)
AssertionError: 'pkg.mod' not found in {}