BUG: Generate baseline

[inoelloc]

With the new build system, importing test files to retrieve the functions used to generate the baseline no longer works.

module = importlib.import_module(mn)

We must add now:

sys.path.insert(0, "")

to allow local import but there is a directory called io which collide with the io standard library ...
One way is to import from tests directory instead of importing:

import io

use

import tests.io

It can be done by changing the current directory:

os.chdir("..")