diff --git a/libs/langgraph/tests/test_state.py b/libs/langgraph/tests/test_state.py
index 0234c5e2f..fcd28cb56 100644
--- a/libs/langgraph/tests/test_state.py
+++ b/libs/langgraph/tests/test_state.py
@@ -106,14 +106,22 @@ def test_state_schema_optional_values(total_: bool):
         val5: Annotated[Required[str], "foo"]
         val6: Annotated[NotRequired[str], "bar"]
 
+    class OutputState(SomeParentState, total=total_):  # type: ignore
+        out_val1: str
+        out_val2: Optional[str]
+        out_val3: Required[str]
+        out_val4: NotRequired[dict]
+        out_val5: Annotated[Required[str], "foo"]
+        out_val6: Annotated[NotRequired[str], "bar"]
+
     class State(InputState):  # this would be ignored
         val4: dict
 
-    builder = StateGraph(State, input=InputState)
+    builder = StateGraph(State, input=InputState, output=OutputState)
     builder.add_node("n", lambda x: x)
     builder.add_edge("__start__", "n")
     graph = builder.compile()
-    model = graph.input_schema
+    model = graph.get_input_schema()
     json_schema = model.schema()
 
     if total_ is False:
@@ -133,6 +141,23 @@ def test_state_schema_optional_values(total_: bool):
         set(json_schema["properties"].keys()) == expected_required | expected_optional
     )
 
+    # Check output schema. Should be the same process
+    output_schema = graph.get_output_schema().schema()
+    if total_ is False:
+        expected_required = set()
+        expected_optional = {"out_val2", "out_val1"}
+    else:
+        expected_required = {"out_val1"}
+        expected_optional = {"out_val2"}
+
+    expected_required |= {"val0a", "out_val3", "out_val5"}
+    expected_optional |= {"val0b", "out_val4", "out_val6"}
+
+    assert set(output_schema.get("required", set())) == expected_required
+    assert (
+        set(output_schema["properties"].keys()) == expected_required | expected_optional
+    )
+
 
 @pytest.mark.parametrize("kw_only_", [False, True])
 def test_state_schema_default_values(kw_only_: bool):
@@ -160,23 +185,24 @@ def test_state_schema_default_values(kw_only_: bool):
     builder.add_node("n", lambda x: x)
     builder.add_edge("__start__", "n")
     graph = builder.compile()
-    model = graph.input_schema
-    json_schema = model.schema()
+    for model in [graph.get_input_schema(), graph.get_output_schema()]:
+        json_schema = model.schema()
 
-    expected_required = {"val1", "val7"}
-    expected_optional = {
-        "val2",
-        "val3",
-        "val4",
-        "val5",
-        "val6",
-        "val8",
-        "val9",
-        "val10",
-        "val11",
-    }
+        expected_required = {"val1", "val7"}
+        expected_optional = {
+            "val2",
+            "val3",
+            "val4",
+            "val5",
+            "val6",
+            "val8",
+            "val9",
+            "val10",
+            "val11",
+        }
 
-    assert set(json_schema.get("required", set())) == expected_required
-    assert (
-        set(json_schema["properties"].keys()) == expected_required | expected_optional
-    )
+        assert set(json_schema.get("required", set())) == expected_required
+        assert (
+            set(json_schema["properties"].keys())
+            == expected_required | expected_optional
+        )