diff --git a/nixos/tests/radarr.nix b/nixos/tests/radarr.nix
index ed90025ac420..85fd6572f061 100644
--- a/nixos/tests/radarr.nix
+++ b/nixos/tests/radarr.nix
@@ -12,7 +12,7 @@ with lib;
 
   testScript = ''
     machine.wait_for_unit("radarr.service")
-    machine.wait_for_open_port("7878")
+    machine.wait_for_open_port(7878)
     machine.succeed("curl --fail http://localhost:7878/")
   '';
 })