diff --git a/langgraph/serde/jsonplus.py b/langgraph/serde/jsonplus.py
index 3fb3f69be..1428bfb3a 100644
--- a/langgraph/serde/jsonplus.py
+++ b/langgraph/serde/jsonplus.py
@@ -69,7 +69,6 @@ class JsonPlusSerializer(SerializerProtocol):
             )
 
     def _reviver(self, value: dict[str, Any]) -> Any:
-        print(value)
         if (
             value.get("lc", None) == 2
             and value.get("type", None) == "constructor"
diff --git a/tests/test_jsonplus.py b/tests/test_jsonplus.py
index 3bbe41429..53ae49377 100644
--- a/tests/test_jsonplus.py
+++ b/tests/test_jsonplus.py
@@ -1,10 +1,13 @@
 import dataclasses
+import sys
 import uuid
 from datetime import datetime, timezone
 from enum import Enum
 
 import dataclasses_json
+import pytest
 from langchain_core.pydantic_v1 import BaseModel as LcBaseModel
+from langchain_core.runnables import RunnableMap
 from pydantic import BaseModel
 
 from langgraph.serde.jsonplus import JsonPlusSerializer
@@ -49,9 +52,10 @@ class Person:
     name: str
 
 
+@pytest.skipif(sys.version_info < (3, 10), reason="requires python3.10 or higher")
 def test_serde_jsonplus() -> None:
-    uid = uuid.uuid4()
-    current_time = datetime.now(timezone.max)
+    uid = uuid.UUID(int=1)
+    current_time = datetime(2024, 4, 19, 23, 4, 57, 51022, timezone.max)
 
     to_serialize = {
         "uid": uid,
@@ -67,8 +71,16 @@ def test_serde_jsonplus() -> None:
         "a_str": "foo",
         "an_int": 1,
         "a_float": 1.1,
+        "runnable_map": RunnableMap({}),
     }
 
     serde = JsonPlusSerializer()
 
-    assert serde.loads(serde.dumps(to_serialize)) == to_serialize
+    dumped = serde.dumps(to_serialize)
+
+    assert (
+        dumped
+        == '{"a_bool": true, "a_float": 1.1, "a_none": null, "a_str": "foo", "an_int": 1, "my_dataclass": {"args": [], "id": ["tests", "test_jsonplus", "MyDataclass"], "kwargs": {"bar": 1, "foo": "foo"}, "lc": 2, "method": null, "type": "constructor"}, "my_enum": {"args": ["foo"], "id": ["tests", "test_jsonplus", "MyEnum"], "kwargs": {}, "lc": 2, "method": null, "type": "constructor"}, "my_funny_pydantic": {"args": [], "id": ["tests", "test_jsonplus", "MyFunnyPydantic"], "kwargs": {"bar": 1, "foo": "foo"}, "lc": 2, "method": null, "type": "constructor"}, "my_pydantic": {"args": [], "id": ["tests", "test_jsonplus", "MyPydantic"], "kwargs": {"bar": 1, "foo": "foo"}, "lc": 2, "method": null, "type": "constructor"}, "my_slotted_class": {"args": [], "id": ["tests", "test_jsonplus", "MyDataclassWSlots"], "kwargs": {"bar": 2, "foo": "bar"}, "lc": 2, "method": null, "type": "constructor"}, "person": {"args": [], "id": ["tests", "test_jsonplus", "Person"], "kwargs": {"name": "foo"}, "lc": 2, "method": null, "type": "constructor"}, "runnable_map": {"graph": {"edges": [], "nodes": [{"data": "Parallel<>Input", "id": 0, "type": "schema"}, {"data": "Parallel<>Output", "id": 1, "type": "schema"}]}, "id": ["langchain", "schema", "runnable", "RunnableParallel"], "kwargs": {"steps": {}}, "lc": 1, "name": "RunnableParallel<>", "type": "constructor"}, "time": {"args": ["2024-04-19T23:04:57.051022+23:59"], "id": ["datetime", "datetime"], "kwargs": {}, "lc": 2, "method": "fromisoformat", "type": "constructor"}, "uid": {"args": ["00000000000000000000000000000001"], "id": ["uuid", "UUID"], "kwargs": {}, "lc": 2, "method": null, "type": "constructor"}}'
+    )
+
+    assert serde.loads(dumped) == to_serialize