diff --git a/src/cmd/ksh93/tests/leaks.sh b/src/cmd/ksh93/tests/leaks.sh
index 256cb4644..51aef3da0 100755
--- a/src/cmd/ksh93/tests/leaks.sh
+++ b/src/cmd/ksh93/tests/leaks.sh
@@ -39,7 +39,7 @@ then	N=512			# number of iterations for each test
 elif	[[ -f /proc/$$/stat && $(uname) == Linux ]]
 then	N=4096			# number of iterations for each test
 	unit=bytes
-	tolerance=$((9*N))	# tolerate 9 bytes per iteration to account for malloc artefacts
+	tolerance=$((16*N))	# tolerate 16 bytes per iteration to account for malloc artefacts
 	function getmem
 	{
 		cut -f 23 -d ' ' </proc/$$/stat
@@ -61,7 +61,7 @@ elif	n=$(ps -o rss= -p "$$" 2>/dev/null) &&
 	let "($n) == ($n) && n > 0"
 then	N=16384
 	unit=KiB
-	tolerance=$((8*N/1024))	# tolerate 8 bytes per iteration to account for malloc/ps artefacts
+	tolerance=$((12*N/1024))# tolerate 12 bytes per iteration to account for malloc/ps artefacts
 	function getmem
 	{
 		ps -o rss= -p "$$"