diff --git a/tools/test/stress2/misc/elf.sh b/tools/test/stress2/misc/elf.sh
index e0f88e5e90bc..eb6650c9c088 100755
--- a/tools/test/stress2/misc/elf.sh
+++ b/tools/test/stress2/misc/elf.sh
@@ -1,71 +1,74 @@
 #!/bin/sh
 
 #
 # SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 #
 # Copyright (c) 2021 Peter Holm
 #
 # 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.
 #
 
 # Fuzz test
 # Spending a long time in elf64_coredump() seen:
 # https://people.freebsd.org/~pho/stress/log/log0183.txt
 # Fixed by: b5cadc643e85
 
 . ../default.cfg
 [ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
 
 dir=/tmp
 odir=`pwd`
+save=/tmp/elf.sh.img
+[ -f $save ] && { echo "$save exists"; exit 0; }
 cc -o /tmp/flip -Wall -Wextra -O2 ../tools/flip.c || exit 1
 
 set -e
 mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
-[ -c /dev/md$mdstart ] &&  mdconfig -d -u $mdstart
+[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
 mdconfig -a -t swap -s 2g -u $mdstart
 newfs $newfs_flags md$mdstart > /dev/null
 mount /dev/md$mdstart $mntpoint
 cd $mntpoint
 set +e
 
 echo "Expect lots of warnings."
 start=`date +%s`
 while [ $((`date +%s` - start)) -lt 180 ]; do
 	cp /bin/ps ./elf
 	for j in `jot 10`; do
 		/tmp/flip -n 1 ./elf
+		cp elf $save; fsync $save; sync
 		timeout -s SIGKILL 2 ./elf aux > /dev/null 2>&1 || break
 		rm -f *.core
 	done
 done
 cd $odir
 
 for i in `jot 6`; do
 	mount | grep -q "on $mntpoint " || break
 	umount $mntpoint && break || sleep 10
 	[ $i -eq 6 ] &&
 	    { echo FATAL; fstat -mf $mntpoint; exit 1; }
 done
 mdconfig -d -u $mdstart
-rm /tmp/flip
+rm /tmp/flip $save
 exit 0