diff --git a/plugins/modules/unlink_agent_linux.py b/plugins/modules/unlink_agent_linux.py
index 6aa89a6..9707ca9 100644
--- a/plugins/modules/unlink_agent_linux.py
+++ b/plugins/modules/unlink_agent_linux.py
@@ -1,3 +1,6 @@
+# (c) 2024, Fernando Mendieta (fernandomendietaovejero@gmail.com)
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
 from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
@@ -48,7 +51,7 @@ def unlink_nessus_agent(module):
         if "No host information found" in output:
             return True, "No Agent is running on the server, no need to unlink"
         else:
-            module.fail_json(msg="Failed to unlink Nessus Agent: {}".format(output))
+            module.fail_json(msg=f"Failed to unlink Nessus Agent: {output}")
 
 
 def main():