diff --git a/Formula/lua.rb b/Formula/lua.rb
index 060dfd001e..9bfc321e97 100644
--- a/Formula/lua.rb
+++ b/Formula/lua.rb
@@ -62,6 +62,12 @@ class Lua < Formula
 
     (lib+"pkgconfig").install 'etc/lua.pc'
   end
+
+  test do
+    output = `#{bin}/lua -e "for i=0,9 do io.write(i) end"`
+    assert_equal "0123456789", output
+    assert_equal 0, $?.exitstatus
+  end
 end
 
 __END__