def METHOD_NAME():
    """Test to ensure that the context manager correctly is set to CPU + bfloat16."""
    plugin = MixedPrecisionPlugin("bf16-mixed", "cpu")
    assert plugin.device == "cpu"
    assert plugin.scaler is None
    context_manager = plugin.autocast_context_manager()
    assert isinstance(context_manager, torch.autocast)
    # check with str due to a bug upstream: https://github.com/pytorch/pytorch/issues/65786
    assert str(context_manager.fast_dtype) == str(torch.bfloat16)