When do module scoped fixtures run?

[jasonhoppessf]

I am new to pytest and I have seen two contradictory examples online. Do module scoped fixtures run as soon as the module is loaded or when passed to a method? If as soon as the module is loaded how do I determine the order? One example is here with grpc_add_to_server https://pypi.org/project/pytest-grpc/. The other example is from the documentation https://docs.pytest.org/en/6.2.x/fixture.html#higher-scoped-fixtures-are-executed-first.

[nicoddemus]

Hi @jasonhoppessf,

They execute as soon as the first test in a module requests it, and are deleted later when the last test of the module finishes (regardless if it requested the module-scoped fixture or not) ¹.

Footnotes

1. Well not technically 100% this part, but it is simpler to think it like this. ↩