diff --git a/nixos/tests/zigbee2mqtt.nix b/nixos/tests/zigbee2mqtt.nix
index b7bb21f9227..98aadbb699b 100644
--- a/nixos/tests/zigbee2mqtt.nix
+++ b/nixos/tests/zigbee2mqtt.nix
@@ -1,4 +1,4 @@
-import ./make-test-python.nix ({ pkgs, ... }:
+import ./make-test-python.nix ({ pkgs, lib, ... }:
 
   {
     machine = { pkgs, ... }:
@@ -6,6 +6,8 @@ import ./make-test-python.nix ({ pkgs, ... }:
         services.zigbee2mqtt = {
           enable = true;
         };
+
+        systemd.services.zigbee2mqtt.serviceConfig.DevicePolicy = lib.mkForce "auto";
       };
 
     testScript = ''
@@ -14,6 +16,8 @@ import ./make-test-python.nix ({ pkgs, ... }:
       machine.succeed(
           "journalctl -eu zigbee2mqtt | grep \"Error: Error while opening serialport 'Error: Error: No such file or directory, cannot open /dev/ttyACM0'\""
       )
+
+      machine.log(machine.succeed("systemd-analyze security zigbee2mqtt.service"))
     '';
   }
 )