diff --git a/tools/regression/bin/sh/expansion/arith12.0 b/tools/regression/bin/sh/expansion/arith12.0
new file mode 100644
index 000000000000..cb7da3b2e21a
--- /dev/null
+++ b/tools/regression/bin/sh/expansion/arith12.0
@@ -0,0 +1,4 @@
+# $FreeBSD$
+
+_x=4 y_=5 z_z=6
+[ "$((_x*100+y_*10+z_z))" = 456 ]