def METHOD_NAME(self):
    """Test DPT4ByteSigned parsing with unpack error."""
    with patch("struct.unpack") as unpack_mock:
        unpack_mock.side_effect = struct.error()
        with pytest.raises(ConversionError):
            DPT4ByteSigned.from_knx(DPTArray((0x01, 0x23, 0x45, 0x67)))