diff --git a/README.md b/README.md
index 5845d23..3138ed3 100644
--- a/README.md
+++ b/README.md
@@ -26,3 +26,17 @@ Clone of 2048 game with euro coins and bills.
  * Report a bug: https://github.com/YunoHost-Apps/20euros_ynh/issues
  * Upstream app repository: https://github.com/jatekos101/20euros
  * YunoHost website: https://yunohost.org/
+
+---
+
+Developers info
+----------------
+
+Please do your pull request to the [testing branch](https://github.com/YunoHost-Apps/20euros_ynh/tree/testing).
+
+To try the testing branch, please proceed like that.
+```
+sudo yunohost app install https://github.com/YunoHost-Apps/20euros_ynh/tree/testing --debug
+or
+sudo yunohost app upgrade 20euros -u https://github.com/YunoHost-Apps/20euros_ynh/tree/testing --debug
+```
diff --git a/README_fr.md b/README_fr.md
index 9d8c495..68d2ea2 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -26,3 +26,17 @@ Clone du jeu 2048 avec pièces et billets en euros.
  * Signaler un bug : https://github.com/YunoHost-Apps/20euros_ynh/issues
  * Dépôt de l’application principale : https://github.com/jatekos101/20euros
  * Site web YunoHost : https://yunohost.org/
+
+---
+
+Informations pour les développeurs
+----------------
+
+Merci de faire vos pull request sur la [branche testing](https://github.com/YunoHost-Apps/20euros_ynh/tree/testing).
+
+Pour essayer la branche testing, procédez comme suit.
+```
+sudo yunohost app install https://github.com/YunoHost-Apps/20euros_ynh/tree/testing --debug
+ou
+sudo yunohost app upgrade 20euros -u https://github.com/YunoHost-Apps/20euros_ynh/tree/testing --debug
+```