diff --git a/tests/sys/netpfil/pf/Makefile b/tests/sys/netpfil/pf/Makefile
--- a/tests/sys/netpfil/pf/Makefile
+++ b/tests/sys/netpfil/pf/Makefile
@@ -22,7 +22,8 @@
 		set_tos \
 		src_track \
 		synproxy \
-		table
+		table \
+		tos
 
 ${PACKAGE}FILES+=	CVE-2019-5597.py \
 			CVE-2019-5598.py \
diff --git a/tests/sys/netpfil/pf/tos.sh b/tests/sys/netpfil/pf/tos.sh
new file mode 100644
--- /dev/null
+++ b/tests/sys/netpfil/pf/tos.sh
@@ -0,0 +1,95 @@
+# $FreeBSD$
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2021 Rubicon Communications, LLC (Netgate)
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+
+. $(atf_get_srcdir)/utils.subr
+
+atf_test_case "v4" "cleanup"
+v4_head()
+{
+	atf_set descr 'tos matching test'
+	atf_set require.user root
+}
+
+v4_body()
+{
+	pft_init
+
+	epair=$(vnet_mkepair)
+	ifconfig ${epair}a 192.0.2.1/24 up
+
+	vnet_mkjail alcatraz ${epair}b
+	jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up
+	jexec alcatraz pfctl -e
+
+	pft_set_rules alcatraz "pass" \
+		"block in tos va"
+
+	atf_check -s exit:0 -o ignore ping -t 1 -c 1 192.0.2.2
+	atf_check -s exit:2 -o ignore ping -t 1 -c 1 -z 0xb0 192.0.2.2
+}
+
+v4_cleanup()
+{
+	pft_cleanup
+}
+
+atf_test_case "v6" "cleanup"
+v6_head()
+{
+	atf_set descr 'IPv6 tos matching test'
+	atf_set require.user root
+}
+
+v6_body()
+{
+	pft_init
+
+	epair=$(vnet_mkepair)
+	ifconfig ${epair}a inet6 2001:db8:42::1/64 up no_dad -ifdisabled
+
+	vnet_mkjail alcatraz ${epair}b
+	jexec alcatraz ifconfig ${epair}b inet6 2001:db8:42::2/64 \
+		up no_dad -ifdisabled
+	jexec alcatraz pfctl -e
+
+	pft_set_rules alcatraz "pass" \
+		"block in tos va"
+
+	atf_check -s exit:0 -o ignore ping6 -t 1 -c 1 2001:db8:42::2
+	atf_check -s exit:2 -o ignore ping6 -t 1 -c 1 -z 176 2001:db8:42::2
+}
+
+v6_cleanup()
+{
+	pft_cleanup
+}
+
+atf_init_test_cases()
+{
+	atf_add_test_case "v4"
+	atf_add_test_case "v6"
+}