diff --git a/tests/test_openapi_async.py b/tests/test_openapi_async.py
index 352f889a9..c6595fe3c 100644
--- a/tests/test_openapi_async.py
+++ b/tests/test_openapi_async.py
@@ -6,7 +6,7 @@ def test_allow_async_openapi():
     async def async_openapi():
         return {"foo": "bar"}
 
-    mod_app = FastAPI()  # use fresh instance to not affect other tests
+    mod_app = FastAPI()
     mod_app.openapi = async_openapi
     mod_client = TestClient(mod_app)
     response = mod_client.get("/openapi.json")