def METHOD_NAME(adata_raw: ad.AnnData, backing_h5ad):
    adata_raw.filename = backing_h5ad
    assert adata_raw.var_names.tolist() == ["var1", "var2"]
    assert adata_raw.raw.var_names.tolist() == ["var1", "var2", "var3"]
    if adata_raw.raw[:, 0].X.shape[1] != 1:
        pytest.xfail("Raw is broken for backed slices")
    assert adata_raw.raw[:, 0].X[:].tolist() == [[1], [4], [7]]