Turns out msettings interface is None is ran from pytest because we bypass the usual moulinette init :/

src/yunohost/hook.py

@@ -401,9 +401,6 @@ def _hook_exec_bash(path, args, chdir, env, return_format, loggers):
     _env = os.environ.copy()
     _env.update(env)
 
-    # FIXME : this is a temporary debug to better understand why the test are failing on the CI but not when ran manually...
-    logger.warning(_env)
-
     returncode = call_async_output(
         cmd, loggers, shell=True, cwd=chdir,
         stdinfo=stdinfo, env=_env

src/yunohost/tests/conftest.py

@@ -3,7 +3,7 @@ import pytest
 import sys
 
 import moulinette
-from moulinette import m18n
+from moulinette import m18n, msettings
 from yunohost.utils.error import YunohostError
 from contextlib import contextmanager
 sys.path.append("..")
@@ -78,3 +78,4 @@ def pytest_cmdline_main(config):
     sys.path.insert(0, "/usr/lib/moulinette/")
     import yunohost
     yunohost.init(debug=config.option.yunodebug)
+    msettings["interface"] = "test"