diff --git a/tests/test_utils/event_builders.py b/tests/test_utils/event_builders.py
index db5c0ff181..7a17806224 100644
--- a/tests/test_utils/event_builders.py
+++ b/tests/test_utils/event_builders.py
@@ -111,6 +111,7 @@ class _EventFields(TypedDict):
     depth: NotRequired[int]
     origin_server_ts: NotRequired[int]
     hashes: NotRequired[dict]
-    auth_events: NotRequired[list]
-    prev_events: NotRequired[list]
+    auth_events: NotRequired[list[str]]
+    prev_events: NotRequired[list[str]]
+    prev_state_events: NotRequired[list[str]]
     room_id: NotRequired[str]