add invalid option for testing

Author: Mic92

tests/installer/default.nix

@@ -22,6 +22,7 @@ let
       (cfg._module.specialArgs.modulesPath + "/profiles/qemu-guest.nix")
       (_: {
         testing.initrdBackdoor = true;
+        testing.invalid = true;
         services.openssh.enable = true;
       })
     ];