diff --git a/pytest_asyncio/plugin.py b/pytest_asyncio/plugin.py
index b4b078e8..20b39e5f 100644
--- a/pytest_asyncio/plugin.py
+++ b/pytest_asyncio/plugin.py
@@ -732,9 +732,8 @@ def pytest_generate_tests(metafunc: Metafunc) -> None:
 
     if event_loop_fixture_id:
         collectors = _iter_collectors(metafunc.definition)
-        collector_event_loop_fixture_ids = map(
-            lambda c: c.stash.get(_event_loop_fixture_id, None),  # type: ignore
-            collectors,
+        collector_event_loop_fixture_ids = (
+            c.stash.get(_event_loop_fixture_id, None) for c in collectors
         )
         possible_event_loop_fixture_ids = {"event_loop"} | set(
             collector_event_loop_fixture_ids