def tearDown(self):
     ProxyTestMixin.tearDown(self)
     ObserverMixin.tearDown(self)
    def setUp(self):
        ProxyTestMixin.setUp(self)
        ObserverMixin.setUp(self)

        self.misdirectionObserver = SubstringObserver("Misdirecting")
        self.addObserver(self.misdirectionObserver)