diff --git a/pytest.ini b/pytest.ini
index c5186e5..10242f2 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,6 +1,8 @@
 [pytest]
 addopts = --doctest-modules -p no:pytest_swh_core
 norecursedirs = build docs .*
 markers =
     fs: tests that involve filesystem ios
     requires_optional_deps: tests in test_cli.py that should not run if optional dependencies are not installed
+
+asyncio_mode = strict