diff --git a/libs/langgraph/tests/test_pregel.py b/libs/langgraph/tests/test_pregel.py
index f6f1257aa..1a2314a48 100644
--- a/libs/langgraph/tests/test_pregel.py
+++ b/libs/langgraph/tests/test_pregel.py
@@ -7687,6 +7687,7 @@ def test_nested_graph_interrupts_parallel(checkpointer: BaseCheckpointSaver) ->
             my_other_key: str
 
         def inner_1(state: InnerState):
+            time.sleep(0.1)
             return {"my_key": "got here", "my_other_key": state["my_key"]}
 
         def inner_2(state: InnerState):
diff --git a/libs/langgraph/tests/test_pregel_async.py b/libs/langgraph/tests/test_pregel_async.py
index 7e60c77fb..b168a7f08 100644
--- a/libs/langgraph/tests/test_pregel_async.py
+++ b/libs/langgraph/tests/test_pregel_async.py
@@ -6196,6 +6196,7 @@ async def test_nested_graph_interrupts_parallel(
             my_other_key: str
 
         async def inner_1(state: InnerState):
+            await asyncio.sleep(0.1)
             return {"my_key": "got here", "my_other_key": state["my_key"]}
 
         async def inner_2(state: InnerState):