def METHOD_NAME(tmp_path):
    onepth = ROOT / '1.2.0' / 'filtered_gene_bc_matrices_h5.h5'
    twopth = tmp_path / "two_genomes.h5"
    with h5py.File(onepth, "r") as one, h5py.File(twopth, "w") as two:
        one.copy("hg19_chr21", two)
        one.copy("hg19_chr21", two, name="hg19_chr21_copy")
    with pytest.raises(ValueError):
        sc.read_10x_h5(twopth)
    sc.read_10x_h5(twopth, genome="hg19_chr21_copy")