def METHOD_NAME(self):
    handler = self.request(user_id=self.dummyReceiver_1['id'], role='receiver')
    response = yield handler.get()
    response['pgp_key_public'] = helpers.PGPKEYS['VALID_PGP_KEY1_PUB'].replace('A', 'B')
    response['pgp_key_remove'] = False
    handler = self.request(response, user_id=self.dummyReceiver_1['id'], role='receiver')
    yield self.assertFailure(handler.put(), errors.InputValidationError)