def fio_json_output_with_error(fio_json_output):
    """
    Example of fio --output-format=json output, with io_u error. Based on
    actual test run.
    """
    err_line = (
        "fio: io_u error on file /mnt/target/simple-write.0.0: "
        "No space left on device: write offset=90280222720, buflen=4096"
    )
    return err_line + "\n" + fio_json_output