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
@@ -63,6 +63,7 @@
 			frag-overreplace.py \
 			pfsync_defer.py \
 			pft_ether.py \
+			pft_read_ipfix.py \
 			utils.subr
 
 ${PACKAGE}FILESMODE_CVE-2019-5597.py=	0555
@@ -73,5 +74,6 @@
 ${PACKAGE}FILESMODE_frag-overreplace.py=	0555
 ${PACKAGE}FILESMODE_pfsync_defer.py=	0555
 ${PACKAGE}FILESMODE_pft_ether.py=	0555
+${PACKAGE}FILESMODE_pft_read_ipfix.py=	0555
 
 .include <bsd.test.mk>
diff --git a/tests/sys/netpfil/pf/pflow.sh b/tests/sys/netpfil/pf/pflow.sh
--- a/tests/sys/netpfil/pf/pflow.sh
+++ b/tests/sys/netpfil/pf/pflow.sh
@@ -74,7 +74,69 @@
 	pft_cleanup
 }
 
+atf_test_case "state_defaults" "cleanup"
+state_defaults_head()
+{
+	atf_set descr 'Test set state-defaults pflow'
+	atf_set require.user root
+	atf_set require.progs scapy
+}
+
+state_defaults_body()
+{
+	pflow_init
+
+	epair=$(vnet_mkepair)
+	ifconfig ${epair}a 192.0.2.2/24 up
+
+	vnet_mkjail alcatraz ${epair}b
+	jexec alcatraz ifconfig ${epair}b 192.0.2.1/24 up
+
+	# Sanity check
+	atf_check -s exit:0 -o ignore ping -c 1 192.0.2.1
+
+	jexec alcatraz pfctl -e
+	pft_set_rules alcatraz \
+		"pass"
+
+	pflow=$(jexec alcatraz pflowctl -c)
+	jexec alcatraz pflowctl -s ${pflow} dst 192.0.2.2:2055
+
+	# No flow data is generated because no states are marked for it.
+	ping -c 1 192.0.2.1
+	# Flush states to force pflow creation
+	jexec alcatraz pfctl -Fstates
+
+	atf_check -o match:"No data" \
+	    $(atf_get_srcdir)/pft_read_ipfix.py --recvif ${epair}a --port 2055
+
+	# Expect pflow output with state-defaults pflow
+	pft_set_rules alcatraz \
+		"set state-defaults pflow" \
+		"pass"
+
+	ping -c 1 192.0.2.1
+
+	# We default to version 5
+	atf_check -o match:"^v=5.*" \
+	    $(atf_get_srcdir)/pft_read_ipfix.py --recvif ${epair}a --port 2055
+
+	# Switch to version 10
+	jexec alcatraz pflowctl -s ${pflow} proto 10
+
+	ping -c 1 192.0.2.1
+
+	atf_check -o match:"^v=10.*" \
+	    $(atf_get_srcdir)/pft_read_ipfix.py --recvif ${epair}a --port 2055
+}
+
+state_defaults_cleanup()
+{
+	pft_cleanup
+}
+
 atf_init_test_cases()
 {
 	atf_add_test_case "basic"
+	atf_add_test_case "state_defaults"
 }
diff --git a/tests/sys/netpfil/pf/pflow.sh b/tests/sys/netpfil/pf/pft_read_ipfix.py
copy from tests/sys/netpfil/pf/pflow.sh
copy to tests/sys/netpfil/pf/pft_read_ipfix.py
--- a/tests/sys/netpfil/pf/pflow.sh
+++ b/tests/sys/netpfil/pf/pft_read_ipfix.py
@@ -1,7 +1,8 @@
+#!/usr/bin/env python3
 #
 # SPDX-License-Identifier: BSD-2-Clause
 #
-# Copyright (c) 2023 Rubicon Communications, LLC (Netgate)
+# Copyright © 2023. Rubicon Communications, LLC (Netgate). All Rights Reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -23,58 +24,55 @@
 # 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 "basic" "cleanup"
-basic_head()
-{
-	atf_set descr 'Basic pflow test'
-	atf_set require.user root
-}
+import argparse
+import logging
+logging.getLogger("scapy").setLevel(logging.CRITICAL)
+import scapy.all as sp
 
-basic_body()
-{
-	pflow_init
+def receive(recvif, recvport):
+	pkts = sp.sniff(iface=recvif, timeout=65)
 
-	epair=$(vnet_mkepair)
-	ifconfig ${epair}a 192.0.2.2/24 up
+	if len(pkts) == 0:
+		print("No data")
+		return
 
-	vnet_mkjail alcatraz ${epair}b
-	jexec alcatraz ifconfig ${epair}b 192.0.2.1/24 up
+	for pkt in pkts:
+		udp = pkt.getlayer(sp.UDP)
+		if not udp:
+			continue
 
-	# Sanity check
-	atf_check -s exit:0 -o ignore ping -c 1 192.0.2.1
+		if udp.dport != recvport:
+			continue
 
-	pflow=$(jexec alcatraz pflowctl -c)
+		hdr = pkt.getlayer(sp.NetflowHeader)
 
-	# Reject invalid flow destinations
-	atf_check -s exit:1 -e ignore \
-	    jexec alcatraz pflowctl -s ${pflow} dst 256.0.0.1:4000
-	atf_check -s exit:1 -e ignore \
-	    jexec alcatraz pflowctl -s ${pflow} dst 192.0.0.2:400000
+		if hdr.version == 5:
+			v5hdr = pkt.getlayer(sp.NetflowHeaderV5)
+			out=""
+			for i in range(1, v5hdr.count + 1):
+				r = pkt.getlayer(sp.NetflowRecordV5, nb=i)
+				out = "%s,proto=%d,src=%s,dst=%s,srcport=%d,dstport=%d" % (out, r.prot, r.src, r.dst, r.srcport, r.dstport)
+			print("v=%d,count=%d%s" % (hdr.version, v5hdr.count, out))
+		elif hdr.version == 10:
+			print("v=10")
+			return
 
-	# A valid destination is accepted
-	atf_check -s exit:0 \
-	    jexec alcatraz pflowctl -s ${pflow} dst 192.0.2.2:4000
+def main():
+	parser = argparse.ArgumentParser("pft_read_ipfix.py",
+	    description="IPFix test tool")
+	parser.add_argument('--recvif', nargs=1,
+	    required=True,
+	    help='The interface on which to look for packets')
+	parser.add_argument('--port', nargs=1,
+	    required=True,
+	    help='The port number')
 
-	# Reject invalid version numbers
-	atf_check -s exit:1 -e ignore \
-	    jexec alcatraz pflowctl -s ${pflow} proto 9
+	args = parser.parse_args()
 
-	# Valid version passes
-	atf_check -s exit:0 \
-	    jexec alcatraz pflowctl -s ${pflow} proto 5
-	atf_check -s exit:0 \
-	    jexec alcatraz pflowctl -s ${pflow} proto 10
-}
+	receive(args.recvif[0], int(args.port[0]))
 
-basic_cleanup()
-{
-	pft_cleanup
-}
+if __name__ == '__main__':
+	main()
 
-atf_init_test_cases()
-{
-	atf_add_test_case "basic"
-}