diff --git a/tools/regression/bin/sh/expansion/arith6.0 b/tools/regression/bin/sh/expansion/arith6.0
new file mode 100644
index 00000000000..fc4589c1bac
--- /dev/null
+++ b/tools/regression/bin/sh/expansion/arith6.0
@@ -0,0 +1,16 @@
+# $FreeBSD$
+
+v1=1\ +\ 1
+v2=D
+v3=C123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789
+f() { v4="$*"; }
+
+while [ ${#v2} -lt 1250 ]; do
+	eval $v2=$((3+${#v2})) $v3=$((4-${#v2}))
+	eval f $(($v2+ $v1 +$v3))
+	if [ $v4 -ne 9 ]; then
+		echo bad: $v4 -ne 9 at ${#v2}
+	fi
+	v2=x$v2
+	v3=y$v3
+done