Regression from 3rd party deps. Test failures in CI (the "tox" workflow) due to Callback API v1 deprecation warnings, on Py 3.8-3.12 (Tox 4.23.2, Pytest 8.3.3). The tests pass on Py 3.7 (Tox 4.8.0, Pytest 7.4.4 )..

Regression from 3rd party deps. Test failures in CI (the "tox" workflow) due to Callback API v1 deprecation warnings, on Py 3.8-3.12 (Tox 4.23.2, Pytest 8.3.3). The tests pass on Py 3.7 (Tox 4.8.0, Pytest 7.4.4 ).. #193