diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ecfe534a4..c56a6ceba 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
diff --git a/tests/test_applications.py b/tests/test_applications.py
index 20ff06385..7bbc2b5b2 100644
--- a/tests/test_applications.py
+++ b/tests/test_applications.py
@@ -95,6 +95,20 @@ def custom_ws_exception_handler(websocket: WebSocket, exc: CustomWSException) ->
     anyio.from_thread.run(websocket.close, status.WS_1013_TRY_AGAIN_LATER)
 
 
+class ExampleState(
+):
+    count: int
+
+
+@asynccontextmanager
+async def lifespan(app: Starlette) -> AsyncGenerator[ExampleState]:
+    yield {"count": 1}
+
+
+async def request_state(request: Request[ExampleState]) -> JSONResponse:
+    return JSONResponse({"state.count": request.state["count"]}, status_code=200)
+
+
 users = Router(
     routes=[
         Route("/", endpoint=all_users_page),
@@ -123,6 +137,7 @@ def custom_ws_exception_handler(websocket: WebSocket, exc: CustomWSException) ->
         Route("/async", endpoint=async_homepage),
         Route("/class", endpoint=Homepage),
         Route("/500", endpoint=runtime_error),
+        Route("/state", endpoint=request_state),
         WebSocketRoute("/ws", endpoint=websocket_endpoint),
         WebSocketRoute("/ws-raise-websocket", endpoint=websocket_raise_websocket_exception),
         WebSocketRoute("/ws-raise-http", endpoint=websocket_raise_http_exception),
@@ -132,6 +147,7 @@ def custom_ws_exception_handler(websocket: WebSocket, exc: CustomWSException) ->
     ],
     exception_handlers=exception_handlers,  # type: ignore
     middleware=middleware,
+    lifespan=lifespan,
 )
 
 
@@ -216,6 +232,12 @@ def test_500(test_client_factory: TestClientFactory) -> None:
     assert response.json() == {"detail": "Server Error"}
 
 
+def test_request_state(client: TestClient) -> None:
+    response = client.get("/state")
+    assert response.status_code == 200
+    assert response.json() == {"state.count": 1}
+
+
 def test_websocket_raise_websocket_exception(client: TestClient) -> None:
     with client.websocket_connect("/ws-raise-websocket") as session:
         response = session.receive()
@@ -257,6 +279,7 @@ def test_routes() -> None:
         Route("/async", endpoint=async_homepage, methods=["GET"]),
         Route("/class", endpoint=Homepage),
         Route("/500", endpoint=runtime_error, methods=["GET"]),
+        Route("/state", endpoint=request_state, methods=["GET"]),
         WebSocketRoute("/ws", endpoint=websocket_endpoint),
         WebSocketRoute("/ws-raise-websocket", endpoint=websocket_raise_websocket_exception),
         WebSocketRoute("/ws-raise-http", endpoint=websocket_raise_http_exception),
diff --git a/tests/test_requests.py b/tests/test_requests.py
index 1799e89e0..f6f1a7086 100644
--- a/tests/test_requests.py
+++ b/tests/test_requests.py
@@ -297,11 +297,25 @@ def test_request_state_object() -> None:
     s.new = "value"
     assert s.new == "value"
 
-    del s.new
+    s["item"] = "baar"
+    assert s["item"] == "baar"
+
+    assert len(s) == 3
+
+    assert "item" in s
+
+    assert "old" in s
 
+    assert "new" in s
+
+    del s.new
     with pytest.raises(AttributeError):
         s.new
 
+    del s["item"]
+    with pytest.raises(KeyError):
+        s["item"]
+
 
 def test_request_state(test_client_factory: TestClientFactory) -> None:
     async def app(scope: Scope, receive: Receive, send: Send) -> None: