pip install pytest-sugar
To run tests without it, run:

pytest -p no:sugar
or uninstall it.
Report each sub-test name and its progress
For a single or a group of tests via pytest (after pip install pytest-pspec):

pytest --pspec tests/test_optimization.py
Instantly shows failed tests
pytest-instafail shows failures and errors instantly instead of
waiting until the end of test session.

pip install pytest-instafail