diff --git a/check_process b/check_process
deleted file mode 100644
index d7e68af..0000000
--- a/check_process
+++ /dev/null
@@ -1,28 +0,0 @@
-;; Test complet
-	; Manifest
-		domain="domain.tld"
-		path="/path"
-		is_public=1
-		language="fr"
-		admin="john"
-		password="1Strong-Password"
-	; Checks
-		pkg_linter=1
-		setup_sub_dir=1
-		setup_root=1
-		setup_nourl=0
-		setup_private=1
-		setup_public=1
-		upgrade=1
-		#2.16.1
-		upgrade=1	from_commit=3c1a929c81b91e6b5d8b8512cd24a3d1fe0e56cd
-		backup_restore=1
-		multi_instance=1
-		change_url=1
-;;; Options
-Email=
-Notification=none
-;;; Upgrade options
-	; commit=3c1a929c81b91e6b5d8b8512cd24a3d1fe0e56cd
-		name=Merge pull request #21 from YunoHost-Apps/testing 
-		manifest_arg=domain=DOMAIN&path=PATH&is_public=1&language=fr&admin=USER&password=pass&port=666&
diff --git a/doc/DISCLAIMER.md b/doc/DISCLAIMER.md
deleted file mode 100644
index 00c24da..0000000
--- a/doc/DISCLAIMER.md
+++ /dev/null
@@ -1,5 +0,0 @@
-:heavy_exclamation_mark: The password-file is created after first opening the admin UI!
-
-:heavy_exclamation_mark: Be sure to immediately change the default password!
-
-Open the admin UI `https://example.com/?admin` to configure your mail server settings. Login with user "admin" and password from the file `/var/www/snappymail/data/_data_/_default_/admin_password.txt`.
diff --git a/doc/notifications/POST_INSTALL.md b/doc/notifications/POST_INSTALL.md
new file mode 100644
index 0000000..e69de29
diff --git a/manifest.json b/manifest.json
deleted file mode 100644
index 26a3b07..0000000
--- a/manifest.json
+++ /dev/null
@@ -1,50 +0,0 @@
-{
-    "name": "SnappyMail",
-    "id": "snappymail",
-    "packaging_format": 1,
-    "description": {
-        "en": "Simple, modern, lightweight & fast web-based e-mail client",
-        "fr": "Client de messagerie Web simple, moderne, léger et rapide"
-    },
-    "version": "2.25.2~ynh1",
-    "url": "https://snappymail.eu/",
-    "upstream": {
-        "license": "AGPL-3.0-only",
-        "website": "https://snappymail.eu/",
-        "demo": "https://snappymail.eu/demo/",
-        "admindoc": "https://github.com/the-djmaze/snappymail/wiki",
-        "code": "https://github.com/the-djmaze/snappymail"
-    },
-    "license": "AGPL-3.0-only",
-    "maintainer": {
-        "name": "",
-        "email": ""
-    },
-    "requirements": {
-        "yunohost": ">= 11.0.9"
-    },
-    "multi_instance": true,
-    "services": [
-        "nginx",
-        "php8.0-fpm"
-    ],
-    "arguments": {
-        "install": [
-            {
-                "name": "domain",
-                "type": "domain"
-            },
-            {
-                "name": "path",
-                "type": "path",
-                "example": "/snappymail",
-                "default": "/snappymail"
-            },
-            {
-                "name": "is_public",
-                "type": "boolean",
-                "default": true
-            }
-        ]
-    }
-}
diff --git a/scripts/backup b/scripts/backup
index f4f7b17..0f27135 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -10,28 +10,6 @@
 source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# MANAGE SCRIPT FAILURE
-#=================================================
-
-#REMOVEME? ynh_clean_setup () {
-	### Remove this function if there's nothing to clean before calling the remove script.
-	true
-}
-# Exit if an error occurs during the execution of the script
-#REMOVEME? ynh_abort_if_errors
-
-#=================================================
-# LOAD SETTINGS
-#=================================================
-#REMOVEME? ynh_print_info --message="Loading installation settings..."
-
-#REMOVEME? app=$YNH_APP_INSTANCE_NAME
-
-#REMOVEME? #REMOVEME? install_dir=$(ynh_app_setting_get --app=$app --key=install_dir)
-#REMOVEME? domain=$(ynh_app_setting_get --app=$app --key=domain)
-#REMOVEME? phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
-
 #=================================================
 # DECLARE DATA AND CONF FILES TO BACKUP
 #=================================================
diff --git a/scripts/install b/scripts/install
index 7d8e849..a857877 100755
--- a/scripts/install
+++ b/scripts/install
@@ -9,75 +9,28 @@
 source _common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# MANAGE SCRIPT FAILURE
-#=================================================
-
-#REMOVEME? ynh_clean_setup () {
-	### Remove this function if there's nothing to clean before calling the remove script.
-	true
-}
-# Exit if an error occurs during the execution of the script
-#REMOVEME? ynh_abort_if_errors
-
 #=================================================
 # RETRIEVE ARGUMENTS FROM THE MANIFEST
 #=================================================
 
-#REMOVEME? domain=$YNH_APP_ARG_DOMAIN
-#REMOVEME? path=$YNH_APP_ARG_PATH
-#REMOVEME? is_public=$YNH_APP_ARG_IS_PUBLIC
-phpversion=$YNH_PHP_VERSION
-
-#REMOVEME? app=$YNH_APP_INSTANCE_NAME
-
 fpm_footprint="low"
 fpm_free_footprint=0
 fpm_usage="low"
 
-#=================================================
-# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
-#=================================================
-#REMOVEME? ynh_script_progression --message="Validating installation parameters..." --weight=1
-
-#REMOVEME? install_dir=/var/www/$app
-#REMOVEME? test ! -e "$install_dir" || ynh_die --message="This path already contains a folder"
-
-# Register (book) web path
-#REMOVEME? ynh_webpath_register --app=$app --domain=$domain --path=$path
-
 #=================================================
 # STORE SETTINGS FROM MANIFEST
 #=================================================
-#REMOVEME? ynh_script_progression --message="Storing installation settings..." --weight=1
+ynh_script_progression --message="Storing installation settings..." --weight=1
 
-#REMOVEME? ynh_app_setting_set --app=$app --key=domain --value=$domain
-#REMOVEME? ynh_app_setting_set --app=$app --key=path --value=$path
 ynh_app_setting_set --app=$app --key=fpm_footprint --value=$fpm_footprint
 ynh_app_setting_set --app=$app --key=fpm_free_footprint --value=$fpm_free_footprint
 ynh_app_setting_set --app=$app --key=fpm_usage --value=$fpm_usage
 
-#=================================================
-# INSTALL DEPENDENCIES
-#=================================================
-#REMOVEME? ynh_script_progression --message="Installing dependencies..." --weight=10
-
-#REMOVEME? ynh_install_app_dependencies $pkg_dependencies
-
-#=================================================
-# CREATE DEDICATED USER
-#=================================================
-#REMOVEME? ynh_script_progression --message="Configuring system user..." --weight=1
-
-# Create a system user
-#REMOVEME? ynh_system_user_create --username=$app --home_dir="$install_dir"
-
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
 ynh_script_progression --message="Setting up source files..." --weight=3
 
-#REMOVEME? ynh_app_setting_set --app=$app --key=install_dir --value=$install_dir
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_setup_source --dest_dir="$install_dir"
 
@@ -102,13 +55,6 @@ ynh_script_progression --message="Configuring NGINX web server..." --weight=2
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
-#=================================================
-# ADD A CONFIGURATION
-#=================================================
-# ynh_script_progression --message="Adding a configuration file..." --weight=1
-
-#ynh_add_config --template="../conf/application.ini" --destination="$install_dir/data/_data_/_default_/configs/application.ini"
-
 #=================================================
 # GENERIC FINALIZATION
 #=================================================
@@ -120,22 +66,12 @@ ynh_script_progression --message="Configuring log rotation..." --weight=1
 ynh_use_logrotate
 
 #=================================================
-# SETUP SSOWAT
+# SECURE FILES AND DIRECTORIES
 #=================================================
-#REMOVEME? ynh_script_progression --message="Configuring permissions..." --weight=1
 
-# Make app public if necessary
-#REMOVEME? if [ $is_public -eq 1 ]
-then
-#REMOVEME? 	ynh_permission_update --permission="main" --add="visitors"
-fi
-
-#=================================================
-# RELOAD NGINX
-#=================================================
-#REMOVEME? ynh_script_progression --message="Reloading NGINX web server..." --weight=1
-
-#REMOVEME? ynh_systemd_action --service_name=nginx --action=reload
+# Set permissions to app files
+chmod -R o-rwx "$install_dir"
+chown -R $app:www-data "$install_dir"
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/remove b/scripts/remove
index 08daf5d..f7ee968 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -9,16 +9,6 @@
 source _common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# LOAD SETTINGS
-#=================================================
-#REMOVEME? ynh_script_progression --message="Loading installation settings..." --weight=1
-
-#REMOVEME? app=$YNH_APP_INSTANCE_NAME
-
-#REMOVEME? domain=$(ynh_app_setting_get --app=$app --key=domain)
-#REMOVEME? #REMOVEME? install_dir=$(ynh_app_setting_get --app=$app --key=install_dir)
-
 #=================================================
 # REMOVE LOGROTATE CONFIGURATION
 #=================================================
@@ -27,14 +17,6 @@ ynh_script_progression --message="Removing logrotate configuration..." --weight=
 # Remove the app-specific logrotate config
 ynh_remove_logrotate
 
-#=================================================
-# REMOVE APP MAIN DIR
-#=================================================
-#REMOVEME? ynh_script_progression --message="Removing app main directory..." --weight=2
-
-# Remove the app directory securely
-#REMOVEME? ynh_secure_remove --file="$install_dir"
-
 #=================================================
 # REMOVE NGINX CONFIGURATION
 #=================================================
@@ -51,24 +33,6 @@ ynh_script_progression --message="Removing PHP-FPM configuration..." --weight=1
 # Remove the dedicated PHP-FPM config
 ynh_remove_fpm_config
 
-#=================================================
-# REMOVE DEPENDENCIES
-#=================================================
-#REMOVEME? ynh_script_progression --message="Removing dependencies..." --weight=5
-
-# Remove metapackage and its dependencies
-#REMOVEME? ynh_remove_app_dependencies
-
-#=================================================
-# GENERIC FINALIZATION
-#=================================================
-# REMOVE DEDICATED USER
-#=================================================
-#REMOVEME? ynh_script_progression --message="Removing the dedicated system user..." --weight=1
-
-# Delete a system user
-#REMOVEME? ynh_system_user_delete --username=$app
-
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index a57f41c..b9327be 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -10,50 +10,6 @@
 source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# MANAGE SCRIPT FAILURE
-#=================================================
-
-#REMOVEME? ynh_clean_setup () {
-	#### Remove this function if there's nothing to clean before calling the remove script.
-	true
-}
-# Exit if an error occurs during the execution of the script
-#REMOVEME? ynh_abort_if_errors
-
-#=================================================
-# LOAD SETTINGS
-#=================================================
-#REMOVEME? ynh_script_progression --message="Loading installation settings..." --weight=1
-
-#REMOVEME? app=$YNH_APP_INSTANCE_NAME
-
-#REMOVEME? domain=$(ynh_app_setting_get --app=$app --key=domain)
-#REMOVEME? path=$(ynh_app_setting_get --app=$app --key=path)
-#REMOVEME? #REMOVEME? install_dir=$(ynh_app_setting_get --app=$app --key=install_dir)
-#REMOVEME? phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
-
-#REMOVEME? fpm_footprint=$(ynh_app_setting_get --app=$app --key=fpm_footprint)
-#REMOVEME? fpm_usage=$(ynh_app_setting_get --app=$app --key=fpm_usage)
-
-#=================================================
-# CHECK IF THE APP CAN BE RESTORED
-#=================================================
-#REMOVEME? ynh_script_progression --message="Validating restoration parameters..." --weight=1
-
-#REMOVEME? test ! -d $install_dir \
-	|| ynh_die --message="There is already a directory: $install_dir "
-
-#=================================================
-# STANDARD RESTORATION STEPS
-#=================================================
-# RECREATE THE DEDICATED USER
-#=================================================
-#REMOVEME? ynh_script_progression --message="Recreating the dedicated system user..." --weight=1
-
-# Create the dedicated user (if not existing)
-#REMOVEME? ynh_system_user_create --username=$app --home_dir="$install_dir"
-
 #=================================================
 # RESTORE THE APP MAIN DIR
 #=================================================
@@ -61,18 +17,6 @@ ynh_script_progression --message="Restoring the app main directory..." --weight=
 
 ynh_restore_file --origin_path="$install_dir"
 
-chmod 750 "$install_dir"
-chmod -R o-rwx "$install_dir"
-chown -R $app:www-data "$install_dir"
-
-#=================================================
-# REINSTALL DEPENDENCIES
-#=================================================
-#REMOVEME? ynh_script_progression --message="Reinstalling dependencies..." --weight=10
-
-# Define and install dependencies
-#REMOVEME? ynh_install_app_dependencies $pkg_dependencies
-
 #=================================================
 # RESTORE THE PHP-FPM CONFIGURATION
 #=================================================
@@ -97,6 +41,14 @@ ynh_script_progression --message="Restoring the logrotate configuration..." --we
 
 ynh_restore_file --origin_path="/etc/logrotate.d/$app"
 
+#=================================================
+# SECURE FILES AND DIRECTORIES
+#=================================================
+
+# Set permissions to app files
+chmod -R o-rwx "$install_dir"
+chown -R $app:www-data "$install_dir"
+
 #=================================================
 # GENERIC FINALIZATION
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 60c0cd2..0d24f31 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -9,42 +9,12 @@
 source _common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# LOAD SETTINGS
-#=================================================
-#REMOVEME? ynh_script_progression --message="Loading installation settings..." --weight=1
-
-#REMOVEME? app=$YNH_APP_INSTANCE_NAME
-
-#REMOVEME? domain=$(ynh_app_setting_get --app=$app --key=domain)
-#REMOVEME? path=$(ynh_app_setting_get --app=$app --key=path)
-#REMOVEME? #REMOVEME? install_dir=$(ynh_app_setting_get --app=$app --key=install_dir)
-phpversion=$YNH_PHP_VERSION
-
-#REMOVEME? fpm_footprint=$(ynh_app_setting_get --app=$app --key=fpm_footprint)
-#REMOVEME? fpm_free_footprint=$(ynh_app_setting_get --app=$app --key=fpm_free_footprint)
-#REMOVEME? fpm_usage=$(ynh_app_setting_get --app=$app --key=fpm_usage)
-
 #=================================================
 # CHECK VERSION
 #=================================================
 
 upgrade_type=$(ynh_check_app_version_changed)
 
-#=================================================
-# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
-#=================================================
-#REMOVEME? ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=1
-
-# Backup the current version of the app
-#REMOVEME? ynh_backup_before_upgrade
-#REMOVEME? ynh_clean_setup () {
-	# Restore it if the upgrade fails
-#REMOVEME? 	ynh_restore_upgradebackup
-}
-# Exit if an error occurs during the execution of the script
-#REMOVEME? ynh_abort_if_errors
-
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
@@ -68,21 +38,6 @@ if [ -z "$fpm_usage" ]; then
     ynh_app_setting_set --app=$app --key=fpm_usage --value=$fpm_usage
 fi
 
-# Cleaning legacy permissions
-#REMOVEME? if ynh_legacy_permissions_exists; then
-#REMOVEME? 	ynh_legacy_permissions_delete_all
-
-	ynh_app_setting_delete --app=$app --key=is_public
-fi
-
-#=================================================
-# CREATE DEDICATED USER
-#=================================================
-#REMOVEME? ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1
-
-# Create a dedicated user (if not existing)
-#REMOVEME? ynh_system_user_create --username=$app --home_dir="$install_dir"
-
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -95,17 +50,6 @@ then
 	ynh_setup_source --dest_dir="$install_dir" --keep="data/_data_/_default_/configs/application.ini"
 fi
 
-chmod 750 "$install_dir"
-chmod -R o-rwx "$install_dir"
-chown -R $app:www-data "$install_dir"
-
-#=================================================
-# UPGRADE DEPENDENCIES
-#=================================================
-#REMOVEME? ynh_script_progression --message="Upgrading dependencies..." --weight=10
-
-#REMOVEME? ynh_install_app_dependencies $pkg_dependencies
-
 #=================================================
 # PHP-FPM CONFIGURATION
 #=================================================
@@ -113,7 +57,6 @@ ynh_script_progression --message="Upgrading PHP-FPM configuration..." --weight=1
 
 # Create a dedicated PHP-FPM config
 ynh_add_fpm_config --phpversion=$phpversion --usage=$fpm_usage --footprint=$fpm_footprint
-#REMOVEME? phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
 
 #=================================================
 # NGINX CONFIGURATION
@@ -134,11 +77,12 @@ ynh_script_progression --message="Upgrading logrotate configuration..." --weight
 ynh_use_logrotate --non-append
 
 #=================================================
-# RELOAD NGINX
+# SECURE FILES AND DIRECTORIES
 #=================================================
-#REMOVEME? ynh_script_progression --message="Reloading NGINX web server..." --weight=1
 
-#REMOVEME? ynh_systemd_action --service_name=nginx --action=reload
+# Set permissions to app files
+chmod -R o-rwx "$install_dir"
+chown -R $app:www-data "$install_dir"
 
 #=================================================
 # END OF SCRIPT
diff --git a/tests.toml b/tests.toml
new file mode 100644
index 0000000..db2fd43
--- /dev/null
+++ b/tests.toml
@@ -0,0 +1,9 @@
+test_format = 1.0
+
+[default]
+
+    # -------------------------------
+    # Commits to test upgrade from
+    # -------------------------------
+
+    test_upgrade_from.3c1a929c.name = "Upgrade from 2.16.1"