class Model(BaseModel):
        foo: str

    non_cached_fields = get_model_fields(Model)
    non_cached_fields2 = get_model_fields(Model)
    cached_fields = get_cached_model_fields(Model)
    cached_fields2 = get_cached_model_fields(Model)
    for f1, f2 in zip(cached_fields, cached_fields2):
        assert f1 is f2

    assert non_cached_fields is not non_cached_fields2