I am using msw with Testing Library and trying to mock an API call to return the content of a JSON file.

Using the example in the documentation, I am trying this code:

rest.get(endpoint, (req, res, ctx) => {
  const json = require('./myJsonFile.json');
  return res(ctx.json(json));
});

but I keep having SonarQube complaining about:

Refactor this function to always return the same type.

Any idea why and how I could refactor this function?

Thank you very much.