diff --git a/Tutorial/README.md b/Tutorial/README.md
index f068ee8..b624321 100644
--- a/Tutorial/README.md
+++ b/Tutorial/README.md
@@ -6,5 +6,7 @@ Easy to modify to your own DIY-joystick (like arcade cabinet) which based on on/
 
 There is also keyboard version, which acts like USB keyboard.
 
+For testing you don't have to have real joystick connected. You can just connect IO-pin to GND with piece of wire or something.
+
 ### Notice
 If you program Arduino sometimes to keyboard and sometimes to joystick, COM-port might change in Windows. Just select new COM-port and upload again.