diff --git a/src/cmd/ksh93/tests/pty.sh b/src/cmd/ksh93/tests/pty.sh
index da4d8ee4cebe..86c6ace79972 100755
--- a/src/cmd/ksh93/tests/pty.sh
+++ b/src/cmd/ksh93/tests/pty.sh
@@ -954,7 +954,7 @@ w : ..\t
 r : \.\./\r\n$
 !
 
-tst $LINENO <<"!"
+((SHOPT_VSH)) && tst $LINENO <<"!"
 L Ctrl+C with SIGINT ignored
 # https://github.com/ksh93/ksh/issues/343
 # Fix improved on 2024-02-12.