It depends a bit on the application you are testing. Let's say your application is an API, then the integration test could be simply calling the different endpoints and comparing the results.

You could make an IntegrationTest class with the proper write_result functions.

So a function could be:

def test_get_users_status(self):
    expected_result = { "user1": "active",  "user2": "inactive" }
    r = requests.get('https://localhost:8080/get_users_status', auth=('user', 'pass'))
    assert r.status_code is 200
    self.write_json(expected_result, r.json())

You can have a function in the integration class that runs all tests, all authentication related tests etc.