diff --git a/src/cmd/ksh93/tests/sh_match.sh b/src/cmd/ksh93/tests/sh_match.sh
index 9ae183ad007a..7e56332e5d2f 100755
--- a/src/cmd/ksh93/tests/sh_match.sh
+++ b/src/cmd/ksh93/tests/sh_match.sh
@@ -52,10 +52,11 @@ function test_xmlfragment1
     typeset -r testscript='test1_script.sh'
 
     cat >"${testscript}" <<-TEST1SCRIPT
-	# memory safeguards to prevent out-of-control memory consumption
-	ulimit -M \$(( 1024 * 1024 ))
-	ulimit -v \$(( 1024 * 1024 ))
-	ulimit -d \$(( 1024 * 1024 ))
+	# Put safeguards to prevent out-of-control memory consumption.
+	# Ignore "read only" error if a limit is not supported.
+	ulimit -M \$(( 1024 * 1024 )) 2>/dev/null
+	ulimit -v \$(( 1024 * 1024 )) 2>/dev/null
+	ulimit -d \$(( 1024 * 1024 )) 2>/dev/null
 
 	# input text
 	xmltext="\$( < "\$1" )"