diff --git a/aiogram/fsm/storage/mongo.py b/aiogram/fsm/storage/mongo.py
index ca0346ac..44ea0430 100644
--- a/aiogram/fsm/storage/mongo.py
+++ b/aiogram/fsm/storage/mongo.py
@@ -1,6 +1,6 @@
 from typing import Any, Dict, Optional, cast
 
-from motor.motor_asyncio import AsyncIOMotorClient, AsyncIOMotorCollection
+from motor.motor_asyncio import AsyncIOMotorClient
 
 from aiogram.fsm.state import State
 from aiogram.fsm.storage.base import (
@@ -33,8 +33,8 @@ class MongoStorage(BaseStorage):
         if key_builder is None:
             key_builder = DefaultKeyBuilder()
         self._client = client
-        self._db_name = db_name
-        self._collection: AsyncIOMotorCollection = self._client[db_name][collection_name]
+        self._database = self._client[db_name]
+        self._collection = self._database[collection_name]
         self._key_builder = key_builder
 
     @classmethod
diff --git a/tests/conftest.py b/tests/conftest.py
index 91ee9975..f13fec10 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -86,7 +86,7 @@ async def mongo_storage(mongo_server):
         pytest.skip(str(e))
     else:
         yield storage
-        await storage._client.drop_database(storage._db_name)
+        await storage._client.drop_database(storage._database)
     finally:
         await storage.close()