```js
// Button.stories.js

import Button from './Button.svelte';

export default {
  /* 👇 The title prop is optional.
   * See https://storybook.js.org/docs/7.0/svelte/configure/overview#configure-story-loading
   * to learn how to generate automatic titles
   */
  title: 'Accessibility testing',
  component: Button,
  argTypes: {
    backgroundColor: { control: 'color' },
  },
};

// This is an accessible story
export const Accessible = {
  render: (args) => ({
    Component: Button,
    props: args,
  }),
  args: {
    primary: false,
    label: 'Button',
  },
};

// This is not
export const Inaccessible = {
  render: (args) => ({
    Component: Button,
    props: args,
  }),
  args: {
    ...Accessible.args,
    backgroundColor: 'red',
  },
};
```