diff --git a/pyproject.toml b/pyproject.toml
index ef226f5..20e2c52 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -73,6 +73,7 @@ known-first-party = ["runboat"]
 env_override_existing_values = 1
 env_files = [".env.test"]
 asyncio_mode = "strict"
+asyncio_default_fixture_loop_scope = "session"
 
 # mypy