'The base I{twisted.test} package is visible to allow traversal to a
few selected test API which is visible.'

def test_privacyClassBaseTestPackage(self):

    sut = TwistedSystem()
    twistedPackage = model.Package(system=sut, name='twisted', docstring='ignored', parent=None)
    twistedTestPackage = model.Package(system=sut, name='test', docstring='ignored', parent=twistedPackage)
    result = sut.privacyClass(twistedTestPackage)
    self.assertIs(result, model.PrivacyClass.VISIBLE)
