diff --git a/nixos/tests/n8n.nix b/nixos/tests/n8n.nix
index 771296bf37a5..0a12192d5c71 100644
--- a/nixos/tests/n8n.nix
+++ b/nixos/tests/n8n.nix
@@ -1,6 +1,7 @@
 import ./make-test-python.nix ({ lib, ... }:
 let
   port = 5678;
+  webhookUrl = "http://example.com";
 in
 {
   name = "n8n";
@@ -11,6 +12,7 @@ in
     {
       services.n8n = {
         enable = true;
+        webhookUrl = webhookUrl;
       };
     };
 
@@ -18,5 +20,6 @@ in
     machine.wait_for_unit("n8n.service")
     machine.wait_for_console_text("Editor is now accessible via")
     machine.succeed("curl --fail -vvv http://localhost:${toString port}/")
+    machine.succeed("grep -qF ${webhookUrl} /etc/systemd/system/n8n.service")
   '';
 })