diff --git a/tests/test_api/test_client/test_session/test_aiohttp_session.py b/tests/test_api/test_client/test_session/test_aiohttp_session.py
index bb89e888..4e982c1b 100644
--- a/tests/test_api/test_client/test_session/test_aiohttp_session.py
+++ b/tests/test_api/test_client/test_session/test_aiohttp_session.py
@@ -8,7 +8,7 @@ from aresponses import ResponsesMockServer
 from aiogram import Bot
 from aiogram.api.client.session.aiohttp import AiohttpSession
 from aiogram.api.methods import Request, TelegramMethod
-from aiogram.api.types import InputFile
+from aiogram.api.types import InputFile, UNSET
 from tests.mocked_bot import MockedBot
 
 try:
@@ -117,6 +117,7 @@ class TestAiohttpSession:
                 "str": "value",
                 "int": 42,
                 "bool": True,
+                "unset": UNSET,
                 "null": None,
                 "list": ["foo"],
                 "dict": {"bar": "baz"},