diff --git a/tests/make-disk-image.nix b/tests/make-disk-image.nix
index 15c1fc4..02d3ead 100644
--- a/tests/make-disk-image.nix
+++ b/tests/make-disk-image.nix
@@ -8,6 +8,7 @@ diskoLib.makeDiskImages {
     ({ config, ... }: {
       documentation.enable = false;
       system.stateVersion = config.system.nixos.version;
+      disko.memSize = 2048;
     })
   ];
 }