Fix asyncio tests

tests/unit/ext/test_aiohttp_py35.py

@@ -4,6 +4,7 @@ from aiohttp import web, test_utils
 from dependency_injector import containers, providers
 from dependency_injector.ext import aiohttp
 from pytest import fixture, mark
+from pytest_asyncio import fixture as aio_fixture
 
 
 async def index_view(_):
@@ -63,7 +64,7 @@ def app():
     return app
 
 
-@fixture
+@aio_fixture
 async def client(app):
     async with test_utils.TestClient(test_utils.TestServer(app)) as client:
         yield client

tests/unit/wiring/test_fastapi_py36.py

@@ -1,5 +1,6 @@
 from httpx import AsyncClient
 from pytest import fixture, mark
+from pytest_asyncio import fixture as aio_fixture
 
 # Runtime import to avoid syntax errors in samples on Python < 3.5 and reach top-dir
 import os
@@ -16,7 +17,7 @@ sys.path.append(_SAMPLES_DIR)
 from wiringfastapi import web
 
 
-@fixture
+@aio_fixture
 async def async_client():
     client = AsyncClient(app=web.app, base_url="http://test")
     yield client