This test fails since it was added in r351248: https://ci.freebsd.org/job/FreeBSD-head-i386-test/6408/testReport/sys.netpfil.common/tos/pf_tos/
This is almost certainly the result of the same i386 bpf issue as #239380.
A commit references this bug: Author: lwhsu Date: Tue Sep 17 22:09:14 UTC 2019 New revision: 352463 URL: https://svnweb.freebsd.org/changeset/base/352463 Log: Temporarily skip sys.netpfil.common.tos.pf_tos on i386 CI as it always fails PR: 240086 Sponsored by: The FreeBSD Foundation Changes: head/tests/sys/netpfil/common/tos.sh
*** This bug has been marked as a duplicate of bug 239380 ***