diff --git a/tests.toml b/tests.toml
index 971645e..e8675a9 100644
--- a/tests.toml
+++ b/tests.toml
@@ -11,7 +11,8 @@ test_format = 1.0
 # (Remove this key entirely if not needed)
 preinstall = """
     sudo yunohost tools update apps
-    sudo yunohost app install https://github.com/YunoHost-Apps/synapse_ynh/ -a "domain=$domain&server_name=$server_name&is_free_registration=$is_free_registration&jitsi_server=$jitsi_server" --force
+    sudo yunohost app install https://github.com/YunoHost-Apps/synapse_ynh/ \
+        -a "domain=$domain&init_main_permission=all_users&server_name=$server_name&is_free_registration=$is_free_registration&jitsi_server=$jitsi_server" --force
     """
 
 # -------------------------------
@@ -35,7 +36,8 @@ args.botusers = "server.name"
 
 preinstall = """
     sudo yunohost tools update apps
-    sudo yunohost app install https://github.com/YunoHost-Apps/synapse_ynh/ -a "domain=$domain&server_name=$server_name&is_free_registration=$is_free_registration&jitsi_server=$jitsi_server" --force
+    sudo yunohost app install https://github.com/YunoHost-Apps/synapse_ynh/ \
+        -a "domain=$domain&init_main_permission=all_users&server_name=$server_name&is_free_registration=$is_free_registration&jitsi_server=$jitsi_server" --force
     """
 
 # On additional tests suites, you can decide to run only specific tests