zfs-tests.sh Failures - Significant or Benign?

[jfelpel]

Running a fresh install of Ubuntu 20.04, fully updated.
I then followed the instructions from the "Building ZFS" page. "https://openzfs.github.io/openzfs-docs/Developer%20Resources/Building%20ZFS.html#building-zfs"

Everything seems to have worked as expected. But, I am running the zfs-tests.sh script and am getting a handful of failures. Like a 1% failure rate.
So, I am not sure if these are just benign failures? or if something is very broken.
Please let me know if any additional information is needed to help make a proper recommendation.

The following is a sample output of the errors:

Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/arc/dbufstats_001_pos (run as root) [00:04] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/arc/dbufstats_002_pos (run as root) [00:04] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/bootfs/bootfs_005_neg (run as root) [00:02] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/sensitive_formd_lookup (run as root) [00:00] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/sensitive_formd_delete (run as root) [00:00] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/mixed_none_lookup_ci (run as root) [00:00] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/mixed_formd_lookup (run as root) [00:00] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/mixed_formd_lookup_ci (run as root) [00:00] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/mixed_formd_delete (run as root) [00:00] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/cli_root/zfs_copies/zfs_copies_005_neg (run as root) [00:00] [FAIL]

But then, for some of the failures, similar tests show a pass status.

Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/arc/dbufstats_001_pos (run as root) [00:04] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/arc/dbufstats_002_pos (run as root) [00:04] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/arc/dbufstats_003_pos (run as root) [00:20] [PASS]

Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/bootfs/bootfs_001_pos (run as root) [00:02] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/bootfs/bootfs_002_neg (run as root) [00:04] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/bootfs/bootfs_003_pos (run as root) [00:03] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/bootfs/bootfs_004_neg (run as root) [00:01] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/bootfs/bootfs_005_neg (run as root) [00:02] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/bootfs/bootfs_006_pos (run as root) [00:11] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/bootfs/bootfs_007_pos (run as root) [00:00] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/bootfs/bootfs_008_pos (run as root) [00:04] [PASS]

Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/sensitive_none_lookup (run as root) [00:01] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/sensitive_none_delete (run as root) [00:01] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/sensitive_formd_lookup (run as root) [00:00] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/sensitive_formd_delete (run as root) [00:00] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/insensitive_none_lookup (run as root) [00:00] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/insensitive_none_delete (run as root) [00:01] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/insensitive_formd_lookup (run as root) [00:00] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/insensitive_formd_delete (run as root) [00:02] [PASS]

Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/mixed_none_lookup (run as root) [00:01] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/mixed_none_lookup_ci (run as root) [00:00] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/mixed_none_delete (run as root) [00:01] [PASS]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/mixed_formd_lookup (run as root) [00:00] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/mixed_formd_lookup_ci (run as root) [00:00] [FAIL]
Test: /home/lnx-admin/zfs/tests/zfs-tests/tests/functional/casenorm/mixed_formd_delete (run as root) [00:00] [FAIL]

Thoughts?
Also, the test script is still running, how long does it usually take to complete?

Thank you for any assistance!
-Jeremy