I'm getting deprecation warnings from jsonschema.compat. This would be a pretty quick fix, i.e. just import from collections.abs instead of collections.

This can be reproduced by running:

python3.8 -Wall -c "import jsonschema.compat"

jsonschema/compat.py:6: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.9 it will stop working