diff --git a/nixos/tests/kde5.nix b/nixos/tests/kde5.nix
index 30db316dba5e..2b61d6f3f0a1 100644
--- a/nixos/tests/kde5.nix
+++ b/nixos/tests/kde5.nix
@@ -18,6 +18,7 @@ import ./make-test.nix ({ pkgs, ...} :
       };
     };
     services.xserver.desktopManager.kde5.enable = true;
+    virtualisation.writableStore = false; # FIXME
   };
 
   testScript = { nodes, ... }: