See https://copr.fedorainfracloud.org/coprs/g/python/python3.8/package/python-wsproto/ for actual logs. This report is automated and not very verbose, but feel free to ping me for help.
I tried updating to the latest upstream, but the test suite still fails in the same place. I've reported it upstream. https://github.com/python-hyper/wsproto/issues/126
Fixed in Python 3.8.0b2.