diff --git a/nixos/tests/gnome3.nix b/nixos/tests/gnome3.nix
index 4787d42d695..492fa61484a 100644
--- a/nixos/tests/gnome3.nix
+++ b/nixos/tests/gnome3.nix
@@ -15,7 +15,7 @@ import ./make-test.nix ({ pkgs, ...} : {
       services.xserver.displayManager.auto.user = "alice";
       services.xserver.desktopManager.gnome3.enable = true;
 
-      virtualisation.memorySize = 512;
+      virtualisation.memorySize = 1024;
     };
 
   testScript =