diff --git a/tests/zfs-tests/tests/functional/cli_root/zhack/zhack_metaslab_leak.ksh b/tests/zfs-tests/tests/functional/cli_root/zhack/zhack_metaslab_leak.ksh
index cc72d6313d4c..0d2a39be6b5a 100755
--- a/tests/zfs-tests/tests/functional/cli_root/zhack/zhack_metaslab_leak.ksh
+++ b/tests/zfs-tests/tests/functional/cli_root/zhack/zhack_metaslab_leak.ksh
@@ -1,70 +1,70 @@
 #!/bin/ksh
 # SPDX-License-Identifier: CDDL-1.0
 
 #
 # This file and its contents are supplied under the terms of the
 # Common Development and Distribution License ("CDDL"), version 1.0.
 # You may only use this file in accordance with the terms of version
 # 1.0 of the CDDL.
 #
 
 #
 # Description:
 #
 # Test whether zhack metaslab leak functions correctly
 #
 # Strategy:
 #
 # 1. Create pool on a loopback device with some test data
 # 2. Gather pool capacity stats
 # 3. Generate fragmentation data with zdb
 # 4. Destroy the pool
 # 5. Create a new pool with the same configuration
 # 6. Export the pool
 # 7. Apply the fragmentation information with zhack metaslab leak
 # 8. Import the pool
 # 9. Verify that pool capacity stats match
 
 . "$STF_SUITE"/include/libtest.shlib
 
 verify_runnable "global"
 
 function cleanup
 {
 	zpool destroy $TESTPOOL
 	rm $tmp
 }
 
 log_onexit cleanup
 log_assert "zhack metaslab leak leaks the right amount of space"
 
 typeset tmp=$(mktemp)
 
 log_must zpool create $TESTPOOL $DISKS
 for i in `seq 1 16`; do
 	log_must dd if=/dev/urandom of=/$TESTPOOL/f$i bs=1M count=16
 	log_must zpool sync $TESTPOOL
 done
 for i in `seq 2 2 16`; do
 	log_must rm /$TESTPOOL/f$i
 done
 for i in `seq 1 16`; do
 	log_must touch /$TESTPOOL/g$i
 	log_must zpool sync $TESTPOOL
 done
 
 alloc=$(zpool get -Hpo value alloc $TESTPOOL)
 log_must eval "zdb -m --allocated-map $TESTPOOL > $tmp"
 log_must zpool destroy $TESTPOOL
 
 log_must zpool create $TESTPOOL $DISKS
 log_must zpool export $TESTPOOL
 log_must eval "zhack metaslab leak $TESTPOOL < $tmp"
 log_must zpool import $TESTPOOL
 
 alloc2=$(zpool get -Hpo value alloc $TESTPOOL)
 
-[[ $((alloc * 1.05)) -gt $alloc2 ]] && [[ $alloc -lt $alloc2 ]] || \
+within_percent $alloc $alloc2 98 || 
 	log_fail "space usage changed too much: $alloc to $alloc2"
 
 log_pass "zhack metaslab leak behaved correctly"