Command failed (cv php:boot --level=settings) when trying to run tests
I recommend you install and use buildkit:
https://github.com/civicrm/civicrm-buildkit

It comes with lots of tools - including those you need to run tests.

I use it on MAMP but from what I understand this will work on Windows as well. 

Alternatively - if you like you can also:
https://github.com/civicrm/civicrm-buildkit-vagrant