diff --git a/lib/testing.nix b/lib/testing.nix
index 392ae8ca9b0d..ca0b72972512 100644
--- a/lib/testing.nix
+++ b/lib/testing.nix
@@ -145,7 +145,6 @@ rec {
         { config, pkgs, ... }:
         {
           virtualisation.memorySize = 1024;
-          virtualisation.readonlyHostFS = false;
           services.xserver.enable = true;
           services.xserver.displayManager.slim.enable = false;
           services.xserver.displayManager.auto.enable = true;