diff --git a/demo/smoke_wall_thickness_transition.mjs b/demo/smoke_wall_thickness_transition.mjs
index 50d000de..b8c9f4c3 100644
--- a/demo/smoke_wall_thickness_transition.mjs
+++ b/demo/smoke_wall_thickness_transition.mjs
@@ -52,6 +52,7 @@ const result = await page.evaluate(async () => {
   delete space.partitions;
   delete space.room_drafts;
   delete space.wall_columns;
+  space.settings = { ...(space.settings || {}), show_borders: true };
   card._cfgEpoch++;
   card._regSignature = '';
   card._setMode('plan');