Examples code breaks on recent versions of Sanic

[ripperdoc]

Pip freeze:

aiofiles==23.1.0
anyio==3.6.2
async-generator==1.10
attrs==22.2.0
certifi==2022.12.7
exceptiongroup==1.1.1
h11==0.14.0
html5tagger==1.3.0
httpcore==0.16.3
httptools==0.5.0
httpx==0.23.3
idna==3.4
iniconfig==2.0.0
multidict==6.0.4
packaging==23.0
pluggy==1.0.0
pytest==7.2.2
pytest-sanic==1.9.1
rfc3986==1.5.0
sanic==23.3.0
sanic-routing==22.8.0
sniffio==1.3.0
tomli==2.0.1
tracerite==1.1.0
ujson==5.7.0
uvloop==0.17.0
websockets==10.4

I'm using the code from README. This test fixture

@pytest.fixture
def test_cli(loop, app, sanic_client):
    return loop.run_until_complete(sanic_client(app, protocol=WebSocketProtocol))

breaks with the error AttributeError: Setting variables on Sanic instances is not allowed. You should change your Sanic instance to use instance.ctx.is_running instead. on the line 112 in utils.py:

        self.app.is_running = True

This seems to happen for at least all of the 22.x and 23.x versions of Sanic.

[ripperdoc]

On Sanic 22.12.0 it instead breaks on an invalid server protocol for websocket websockets.exceptions.InvalidURI: http://127.0.0.1:62871/test_ws isn't a valid URI: scheme isn't ws or wss, and the other tests break on ConnectionResetError: [Errno 54] Connection reset by peer so not sure what's going on.

[vmred]

any workaround found?