Svelte bind not working

It seems that in the context of a test the `bind` here does not get processed:

```html
<input data-testid="my-input" bind:value={myVar} />
```

I do this in a test:

```js
const input = getByTestId('my-input');
fireEvent.change(input, {target: {value: 'some text'}});
```

The input value gets changed, but the variable `myVar` does not.

