diff --git a/tests/default.nix b/tests/default.nix
index 1274983..cbae60b 100644
--- a/tests/default.nix
+++ b/tests/default.nix
@@ -6,8 +6,6 @@
     ../nixos-module/invoiceninja.nix
   ];
 
-  system.stateVersion = "25.11";
-
   nixpkgs.config.allowUnfree = true;
 
   users.users.test = {