this somewhat related to my actuall code, Async context manager class used in pytest fixture returns async generator object instead of the expected context manager instance. Need help resolving this issue.

 import asyncio

 class MyAsyncContextManager:
    async def __aenter__(self):
        print("Entering async context")
        return self
    async def __aexit__(self, exc_type, exc, tb):
        print("Exiting async context")
    def add_numbers(self, a, b):
        return a + b
    
 @pytest.fixture
 async def async_context_manager():
    async with MyAsyncContextManager() as manager:
        yield manager

 @pytest.mark.asyncio
 async def test_async_context_manager(async_context_manager):
    assert isinstance(async_context_manager, MyAsyncContextManager)
    async_context_manager.add_numbers(1, 2)```

this is my code

```assert isinstance(async_context_manager, MyAsyncContextManager)
 assert False 
  +  where False = isinstance(<async_generator object async_context_manager at 0x723c132acec0>,     MyAsyncContextManager)```

the error i am getting