Before anything, don't forget to run
pip3 install -r requirements.txt
Or
python3 -m pip install -r requirements.txt
and download the latest Webdriver for Chrome and/or Firefox.
Now change the CHROMEDRIVER and/or FIREFOXDRIVER variable in conftest.py
Enjoy :D.
Edit : If you want to test the dropdowns practice you would need to run each tests individually. using '-k' parameter, like so
py.test test_dropdows_practice -k multi
or
py.test test_dropdows_practice -k round
or
py.test test_dropdows_practice -k flight
These are compilations of me showcasing my skills in Selenium, and Pytest. I hope you find them satisfactory.