pytest: enable strict mode

Author: fbrausse

pyproject.toml

@@ -35,6 +35,7 @@ where = ["."]
 exclude = ["src*", "smlp_py*", "regr_smlp*", "utils*"]
 
 [tool.pytest.ini_options]
+strict = true
 markers = [
     "toy: Toy example tests (deselect with '-m \"not toy\"')",
     "real: Tests on real world data (deselect with '-m \"not real\"')",