def METHOD_NAME(old, new, expect_none=False):
    """
    Compare new param dict to old
    """
    if new is None and not expect_none:
        return 'Unexpected parse error'
    if expect_none and new is not None:
        return 'Should have failed'
    diffs = [(k, new[k]) for k in old if old[k] != new[k]]
    return sorted(diffs)