diff --git a/demo/src/ha-demo.ts b/demo/src/ha-demo.ts
index d80eae6fad..2a14459de0 100644
--- a/demo/src/ha-demo.ts
+++ b/demo/src/ha-demo.ts
@@ -26,7 +26,7 @@ class HaDemo extends HomeAssistantAppEl {
         this._updateHass(hassUpdate),
     };
 
-    const hass = provideHass(this, initial);
+    const hass = (this.hass = provideHass(this, initial));
     mockLovelace(hass);
     mockAuth(hass);
     mockTranslations(hass);