Code coverage in Storybook 8

[xgebi]

Summary

So, I'm trying to upgrade from v7.6.4 to v8.0.8. Quite a few tests started failing after the upgrade with

[Test runner] An error occurred when evaluating code coverage:
      The code in this story is not instrumented, which means the coverage setup is likely not correct.
      More info: https://github.com/storybookjs/test-runner#setting-up-code-coverage

When I checked with docs it was still referring to jest. Is that information still correct?

As for the story, that fails it looks like this:

export const Default: Story = {
    render: Template,
};

There's no play function. In this format pure CSS components pass but not components based on lit.

Additional information

No response

Create a reproduction

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[umema4]

same here.
"storybook": "^8.1.9",
"@storybook/test-runner": "^0.18.2",
"@storybook/addon-coverage": "^1.0.4",

[cglango]

Anyone find a solution?