This is anita version 2.8
Using pexpect version 4.8.0
/usr/pkg/bin/anita \
    --workdir=/bracket/sparc64/test/2021.04.25.22.45.16/anita \
    --structured-log-file=/bracket/sparc64/test/2021.04.25.22.45.16/test.slog \
    --vmm-args= test \
    file:///bracket/sparc64/test/2021.04.25.22.45.16/release/images/NetBSD-9.99.82-sparc64.iso
QEMU emulator version 5.1.0
Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers
qemu path: /usr/pkg/bin/qemu-system-sparc64
qemu package: qemu-5.1.0nb9
glib2 package: glib2-2.64.1
qemu-system-sparc64 \
    -m 128 \
    -drive file=/bracket/sparc64/test/2021.04.25.22.45.16/anita/wd0.img,format=raw,media=disk,snapshot=on \
    -nographic \
    -drive file=/bracket/sparc64/test/2021.04.25.22.45.16/anita/tests-results.img,format=raw,media=disk,snapshot=off
child pid is 3332
OpenBIOS for Sparc64
Configuration device id QEMU version 1 machine id 0
kernel cmdline 
CPUs: 1 x SUNW,UltraSPARC-IIi
UUID: 00000000-0000-0000-0000-000000000000
Welcome to OpenBIOS v1.1 built on Jul 27 2020 08:14
  Type 'help' for detailed information
Trying disk:a...
Not a bootable ELF image
Not a bootable a.out image

Loading FCode image...
Loaded 7514 bytes
entry point is 0x4000
Evaluating FCode...
NetBSD IEEE 1275 Multi-FS Bootblock
Version $NetBSD: bootblk.fth,v 1.15 2015/08/20 05:40:08 dholland Exp $
..>> NetBSD/sparc64 OpenFirmware Boot, Revision 1.20 (Mon Apr 26 00:41:20 UTC 2021)
=0xc46b18
Loading netbsd: 12872408+510328+342040read section headers: Input/output error
Unhandled Exception 0x000000000000006c
PC = 0x000000000010dcfc NPC = 0x000000000010dd00
Stopping execution
Traceback (most recent call last):
  File "/usr/pkg/bin/anita", line 157, in <module>
    status = main()
  File "/usr/pkg/bin/anita", line 148, in main
    status = a.run_tests(timeout = options.test_timeout)
  File "/usr/pkg/lib/python3.7/site-packages/anita.py", line 2441, in run_tests
    child = self.boot(scratch_disk_args)
  File "/usr/pkg/lib/python3.7/site-packages/anita.py", line 2368, in boot
    r = self.child.expect([r'\033\[c', r'\033\[5n', r'login:'])
  File "/usr/pkg/lib/python3.7/site-packages/anita.py", line 241, in expect
    r = pexpect.spawn.expect(self, pattern, *args, **kwargs)
  File "/usr/pkg/lib/python3.7/site-packages/pexpect/spawnbase.py", line 344, in expect
    timeout, searchwindowsize, async_)
  File "/usr/pkg/lib/python3.7/site-packages/pexpect/spawnbase.py", line 372, in expect_list
    return exp.expect_loop(timeout)
  File "/usr/pkg/lib/python3.7/site-packages/pexpect/expect.py", line 181, in expect_loop
    return self.timeout(e)
  File "/usr/pkg/lib/python3.7/site-packages/pexpect/expect.py", line 144, in timeout
    raise exc
pexpect.exceptions.TIMEOUT: Timeout exceeded.
<anita.pexpect_spawn_log object at 0x7e10ffb1c1a0>
command: /usr/pkg/bin/qemu-system-sparc64
args: ['/usr/pkg/bin/qemu-system-sparc64', '-m', '128', '-drive', 'file=/bracket/sparc64/test/2021.04.25.22.45.16/anita/wd0.img,format=raw,media=disk,snapshot=on', '-nographic', '-drive', 'file=/bracket/sparc64/test/2021.04.25.22.45.16/anita/tests-results.img,format=raw,media=disk,snapshot=off']
buffer (last 100 chars): b'Exception 0x000000000000006c\r\nPC = 0x000000000010dcfc NPC = 0x000000000010dd00\r\nStopping execution\r\n'
before (last 100 chars): b'Exception 0x000000000000006c\r\nPC = 0x000000000010dcfc NPC = 0x000000000010dd00\r\nStopping execution\r\n'
after: <class 'pexpect.exceptions.TIMEOUT'>
match: None
match_index: None
exitstatus: None
flag_eof: False
pid: 3332
child_fd: 9
closed: False
timeout: 3600
delimiter: <class 'pexpect.exceptions.EOF'>
logfile: None
logfile_read: <anita.multifile object at 0x7e10ffb1c2e0>
logfile_send: <anita.Logger object at 0x7e10ffb1c4a0>
maxread: 2000
ignorecase: False
searchwindowsize: None
delaybeforesend: 0.05
delayafterclose: 30.0
delayafterterminate: 30.0
searcher: searcher_re:
    0: re.compile(b'\\033\\[c')
    1: re.compile(b'\\033\\[5n')
    2: re.compile(b'login:')
     3630.88 real      3588.29 user         1.99 sys