diff --git a/pyproject.toml b/pyproject.toml
index 52b032f771..bea8d77127 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -379,6 +379,7 @@ testpaths = ["tests", "docs/user-guide"]
 log_cli_level = "INFO"
 xfail_strict = true
 asyncio_mode = "auto"
+asyncio_default_fixture_loop_scope = "function"
 doctest_optionflags = [
     "NORMALIZE_WHITESPACE",
     "ELLIPSIS",