Difference in parameterized tests with nose and nose2

simple_test.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# With nose, this test will (incorrectly) pass
# With nose2, this test will (correctly) fail

import unittest

class TestSomething(unittest.TestCase):

    def validate(self, x, y):
        self.assertEqual(x, y)

    def test_many(self):
        for x, y in [(True, True), (True, False)]:
            yield self.validate, x, y