diff --git a/pyproject.toml b/pyproject.toml
index 35cceba..76f9846 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -73,6 +73,7 @@ sdss = ["sdsstools", "clu"]
 [tool.pytest.ini_options]
 addopts = "--cov lvmecp --cov-report xml --cov-report html --cov-report term"
 asyncio_mode = "auto"
+asyncio_default_fixture_loop_scope = "function"
 
 [tool.coverage.run]
 branch = true