Reproducing Svelte Plugin Strip error

This is a project template for Svelte apps. It lives at https://github.com/sveltejs/template.

Add next lines for testing purpose

App.svelte, code block strip:

unittest: {
  name = 'Strip doesn\'t work'
}

rollup.conf.js:

import strip from '@rollup/plugin-strip';
...

strip({
  labels: ['unittest']
}),

Run commands

npm install

npm run dev

Checking

Visit http://localhost:5000

You see this one, if strip plugin doesn't work: HELLO STRIP DOESN'T WORK!

Expected behaviour:

You see this one: HELLO WORLD!