diff --git a/src/panel/NotificationConfigView.js b/src/panel/NotificationConfigView.js
index d7bd076..fe56102 100644
--- a/src/panel/NotificationConfigView.js
+++ b/src/panel/NotificationConfigView.js
@@ -101,7 +101,7 @@ Ext.define('Proxmox.panel.NotificationEndpointView', {
 			success: function(response, opt) {
 			    Ext.Msg.show({
 				title: gettext('Notification Target Test'),
-				message: gettext(`Sent test notification to '${target}'.`),
+				message: Ext.String.format(gettext("Sent test notification to '{0}'.")),
 				buttons: Ext.Msg.OK,
 				icon: Ext.Msg.INFO,
 			    });