diff --git a/nixos/tests/cage.nix b/nixos/tests/cage.nix
index 2d4dacfc0e7..69cc76d315f 100644
--- a/nixos/tests/cage.nix
+++ b/nixos/tests/cage.nix
@@ -13,18 +13,10 @@ import ./make-test-python.nix ({ pkgs, ...} :
     services.cage = {
       enable = true;
       user = "alice";
-      program = "${pkgs.xterm}/bin/xterm -cm -pc"; # disable color and bold to make OCR easier
+      # Disable color and bold and use a larger font to make OCR easier:
+      program = "${pkgs.xterm}/bin/xterm -cm -pc -fa Monospace -fs 24";
     };
 
-    # this needs a fairly recent kernel, otherwise:
-    #   [backend/drm/util.c:215] Unable to add DRM framebuffer: No such file or directory
-    #   [backend/drm/legacy.c:15] Virtual-1: Failed to set CRTC: No such file or directory
-    #   [backend/drm/util.c:215] Unable to add DRM framebuffer: No such file or directory
-    #   [backend/drm/legacy.c:15] Virtual-1: Failed to set CRTC: No such file or directory
-    #   [backend/drm/drm.c:618] Failed to initialize renderer on connector 'Virtual-1': initial page-flip failed
-    #   [backend/drm/drm.c:701] Failed to initialize renderer for plane
-    boot.kernelPackages = pkgs.linuxPackages_latest;
-
     virtualisation.memorySize = 1024;
   };