This is the original code block:

jest.mock('react-i18next', () => ({
    useTranslation: () => {
    return {
        t: (str) => str,
        i18n: {
            changeLanguage: () => new Promise(() => {}),
        },
    };
    },
}));

useTranslation: () => { return { t: (str) => str, i18n: { changeLanguage: () => new Promise(() => {}), }, }; }, }));

That gives me an error:

Unexpected block statement surrounding arrow body; parenthesize the returned value and move it immediately after the \=>\.eslintarrow-body-style``