def METHOD_NAME():
    """
    Test deep merging of dicts with merge_lists enabled.
    """
    src_dict = {
        "string_key": "string_val_src",
        "list_key": ["list_val_src"],
        "dict_key": {"dict_key_src": "dict_val_src"},
    }
    dest_dict = {
        "string_key": "string_val_dest",
        "list_key": ["list_val_dest"],
        "dict_key": {"dict_key_dest": "dict_val_dest"},
    }
    merged_dict = {
        "string_key": "string_val_src",
        "list_key": ["list_val_dest", "list_val_src"],
        "dict_key": {
            "dict_key_dest": "dict_val_dest",
            "dict_key_src": "dict_val_src",
        },
    }
    defaults.merge(dest_dict, src_dict, merge_lists=True)
    assert dest_dict == merged_dict