nose multiprocessing failure

gistfile1.py

from nose.tools import make_decorator


class decorate(object):

    def __init__(self, numbers):
        self.numbers = numbers

    def __call__(self, f): 
        def wrap(args):
            f(*args)
        @make_decorator(f)
        def new_f(*args, **kwargs):
            for numbers in self.numbers:
                yield wrap, numbers
        return new_f


@decorate([(1,1), (2,2), (3,3)])
def test_foo(x, y):
    assert x == y