fix: async fixtures in conftest.py (#2068)

Author: stevenh

tests/conftest.py

@@ -176,7 +176,7 @@ def check_import() -> bool:
 
 
 @pytest.fixture(autouse=True)
-def set_event_loop() -> Iterator[None]:
+def set_event_loop(anyio_backend: str) -> Iterator[None]:
     new_loop = asyncio.new_event_loop()
     asyncio.set_event_loop(new_loop)
     yield
@@ -205,7 +205,7 @@ def vcr_config():
 
 
 @pytest.fixture(autouse=True)
-async def close_cached_httpx_client() -> AsyncIterator[None]:
+async def close_cached_httpx_client(anyio_backend: str) -> AsyncIterator[None]:
     yield
     for provider in [
         'openai',