diff --git a/tests/sys/netinet6/frag6/frag6_16.py b/tests/sys/netinet6/frag6/frag6_16.py
index c38f5da4dea9..42ac8e2b4675 100644
--- a/tests/sys/netinet6/frag6/frag6_16.py
+++ b/tests/sys/netinet6/frag6/frag6_16.py
@@ -1,132 +1,132 @@
 #!/usr/bin/env python
 #-
 # SPDX-License-Identifier: BSD-2-Clause
 #
 # Copyright (c) 2019 Netflix, Inc.
 #
 # 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.
 #
 # $FreeBSD$
 #
 
 import argparse
 import scapy.all as sp
 import socket
 import sys
 from sniffer import Sniffer
 from time import sleep
 
 def check_icmp6_error(args, packet):
 	ip6 = packet.getlayer(sp.IPv6)
 	if not ip6:
 		return False
 	oip6 = sp.IPv6(src=args.src[0], dst=args.to[0])
 	if ip6.dst != oip6.src:
 		return False
 	icmp6 = packet.getlayer(sp.ICMPv6DestUnreach)
 	if not icmp6:
 		return False
 	# ICMP6_DST_UNREACH_NOPORT 4
 	if icmp6.code != 4:
 		return False
 	# Should we check the payload as well?
 	# We are running in a very isolated environment and nothing else
 	# should trigger an ICMPv6 Dest Unreach / Port Unreach so leave it.
 	#icmp6.display()
 	return True
 
 def main():
 	parser = argparse.ArgumentParser("frag6.py",
 		description="IPv6 fragementation test tool")
 	parser.add_argument('--sendif', nargs=1,
 		required=True,
 		help='The interface through which the packet will be sent')
 	parser.add_argument('--recvif', nargs=1,
 		required=True,
 		help='The interface on which to check for the packet')
 	parser.add_argument('--src', nargs=1,
 		required=True,
 		help='The source IP address')
 	parser.add_argument('--to', nargs=1,
 		required=True,
 		help='The destination IP address')
 	parser.add_argument('--debug',
 		required=False, action='store_true',
 		help='Enable test debugging')
 
 	args = parser.parse_args()
 
 
 	# Start sniffing on recvif
 	sniffer = Sniffer(args, check_icmp6_error)
 
 
 	########################################################################
 	#
 	# A single fragmented packet with upper layer data in multiple segments
 	# to pass fragmentation.
 	# We need to do a bit of a dance to get the UDP checksum right.
 	#
 	# A:  1 reassembled packet
 	# R:  Statistics and ICMPv6 error (non-fragmentation) as no port open.
 	#
 	data = "6" * 1280
 	dataall = data * 30
 	ip6f01 = \
 		sp.IPv6(src=args.src[0], dst=args.to[0]) / \
 		sp.UDP(dport=3456, sport=6543) / \
 		dataall
 	ip6fd = sp.IPv6(sp.raw(ip6f01))
 
 	ip6f01 = sp.Ether() / \
 		sp.IPv6(src=args.src[0], dst=args.to[0]) / \
 		sp.IPv6ExtHdrFragment(offset=0, m=1, id=16) / \
 		sp.UDP(dport=3456, sport=6543, len=ip6fd.len, chksum=ip6fd.chksum) / \
 		data
 	if args.debug :
 		ip6f01.display()
 	sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
 
 	foffset=(int)(1288/8)
 	mbit=1
 	for i in range(1,30):
-		if i is 29:
+		if i == 29:
 			mbit=0
 		ip6f0n = sp.Ether() / \
 			sp.IPv6(src=args.src[0], dst=args.to[0]) / \
 			sp.IPv6ExtHdrFragment(offset=foffset, m=mbit, id=16, nh=socket.IPPROTO_UDP) / \
 			data
 		if args.debug :
 			ip6f0n.display()
 		sp.sendp(ip6f0n, iface=args.sendif[0], verbose=False)
 		foffset += (int)(1280/8)
 
 	sleep(0.10)
 	sniffer.setEnd()
 	sniffer.join()
 	if not sniffer.foundCorrectPacket:
 		sys.exit(1)
 
 	sys.exit(0)
 
 if __name__ == '__main__':
 	main()