diff --git a/libs/langgraph/tests/test_pregel_async.py b/libs/langgraph/tests/test_pregel_async.py
index 73de0b953..7afd292ae 100644
--- a/libs/langgraph/tests/test_pregel_async.py
+++ b/libs/langgraph/tests/test_pregel_async.py
@@ -514,6 +514,7 @@ async def test_cancel_graph_astream_events_v2(checkpointer_name: Optional[str])
                 if chunk["event"] == "on_chain_stream" and not chunk["parent_ids"]:
                     got_event = True
                     assert chunk["data"]["chunk"] == {"alittlewhile": {"value": 2}}
+                    await asyncio.sleep(0)
                     break
 
         # did break