[jbuild]$ sudo python3.6 -m pytest test/ -s
[sudo] password for jack:
/usr/bin/python3.6: No module named pytest
[build]$ sudo python3.7 -m pytest test/ -s
====================================================== test session starts =======================================================
platform linux -- Python 3.7.2, pytest-4.2.0, py-1.5.4, pluggy-0.8.1 -- /usr/bin/python3.7
cachedir: .pytest_cache
.....