diff --git a/check_reboot-required b/check_reboot-required
index 1959aaf..a78aa8f 100644
--- a/check_reboot-required
+++ b/check_reboot-required
@@ -22,6 +22,7 @@
 # Script: check_reboot-required                                                              #
 # License: This file is licensed under the GPLv3 License                                     #
 # Purpose: Check if reboot is required                                                       #
+# Tested on: Proxmox 6, CentOS 6/7/8, Debian 8/9/10 and Ubuntu 16.04/18.04/20.04             #
 #                                                                                            #
 ##############################################################################################
 #                                                                                            #