diff --git a/scripts/upgrade b/scripts/upgrade
index 3c4c2b2..8d7e7b6 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -62,6 +62,15 @@ if [ "$upgrade_type" == "UPGRADE_APP" ]
 then
 	ynh_script_progression --message="Upgrading source files..." --weight=5
 
+	if [[ ! -f "$final_path/data" ]]; then
+		# config.ini.php is only created during the post-install process...
+		# it is therefore not present when the CI tests are carried out...
+		# This condition is only for CI test to go through the upgrade process
+		ynh_secure_remove --file="$final_path"
+		# Download, check integrity, uncompress and patch the source from app.src
+		ynh_setup_source --dest_dir="$final_path"
+	else
+
 		tmpdir="$(mktemp -d)"
 
 		# Backup the config file in the temp dir
@@ -110,14 +119,7 @@ ynh_add_fpm_config --package="$extra_php_dependencies"
 
 # Set permissions to app files
 chown -R $app: $final_path
-
-#=================================================
-# MODIFY A CONFIG FILE
-#=================================================
-
-cp -a ../conf/config-dist.php "$final_path/config-dist.php"
-
-ynh_replace_string --match_string="__LANGUAGE__" --replace_string="$language" --target_file="$final_path/data/config.php"
+chmod -R 755 $final_path/data
 
 #=================================================
 # INTEGRATE SERVICE IN YUNOHOST