diff --git a/README.md b/README.md
index 3c962fe..78e7212 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ EspruinoAppLoaderCore
 
 [![Build Status](https://github.com/espruino/EspruinoAppLoaderCore/actions/workflows/nodejs.yml/badge.svg)](https://github.com/espruino/EspruinoAppLoaderCore/actions/workflows/nodejs.yml)
 
-This is the code use for both:
+This is the code used for both:
 
 * [Bangle.js](https://banglejs.com/) App Loader : https://github.com/espruino/BangleApps
 * [Espruino](http://www.espruino.com/) App Loader : https://github.com/espruino/EspruinoApps
@@ -13,3 +13,10 @@ onto embedded devices.
 
 See https://github.com/espruino/BangleApps for more details on usage and the
 format of `apps.json`.
+
+## Testing
+To test different changes:
+1. Clone the `BangleApps` repository on your local machine.
+2. Make changes to this submodule inside the BangleApps folder `core`. In GitHub web, it's shown as a link to the submodule, but in a clone on your PC, it has all the files that this module has.
+3. Test using `index.html`, and when you are ready, migrate changes to here
+4. Create a PR to merge your changes with the upstream repository