diff --git a/packages/design-core/src/init.js b/packages/design-core/src/init.js
index c5413fe8ea..7a65d71b5f 100644
--- a/packages/design-core/src/init.js
+++ b/packages/design-core/src/init.js
@@ -151,4 +151,6 @@ export const init = async ({
 
   app.mount(selector)
   appMounted?.({ app })
+
+  return app
 }
diff --git a/packages/design-core/src/preview/src/main.js b/packages/design-core/src/preview/src/main.js
index a021f48040..68b5075929 100644
--- a/packages/design-core/src/preview/src/main.js
+++ b/packages/design-core/src/preview/src/main.js
@@ -30,4 +30,6 @@ export const initPreview = ({ registry, lifeCycles = {} }) => {
   initSvgs(app)
 
   app.mount('#app')
+
+  return app
 }