ModuleNotFoundError: No module named 'sanic_testing'

An error occured in unittesting with the sanic server.
For our application, we need to upgrade httpx to (0.23.0) and considered sanic (21.12.1) version for our application.
As per issue 2086 in github, we tried to install sanic-testing latest version (22.3.0) which has conflict with httpx(0.23.0)

Getting below error:
.tox/py38/lib/python3.8/site-packages/sanic/app.py:1028: in test_client
from sanic_testing.testing import SanicTestClient # type: ignore
ModuleNotFoundError: No module named ‘sanic_testing’.

How can we resolve the above error considering httpx (0.23.0) and sanic (21.12.1) ?
Which sanic-testing version is compatible with httpx(0.23.0)?

See here Upgrade httpx for Sanic 20.12 LTS