CSS modules aren't recognized in tests

[MevenGedivote]

Hello, I have a problem when mounting a basic component. I keep getting an error that it can't read the property of the $style object used by CSS Modules :

TypeError: Cannot read properties of undefined (reading 'wrapper')
❯ Proxy._sfc_render components/Home.vue:2:40
1| <template>
2| <div id="home" :class="$style.wrapper">

My vitest.config configuration file is very basic, it only defines aliases and a few environment options.

When I only pass a string for the class property and not the $style.[classname] variable, my tests run fine.

I don't understand what I am missing, every auto-imports of components, composables etc. is working fine, except this part. 🤷

Thanks in advance, have a good day !