Mocha - SyntaxError: Unexpected identifier

По инструкции настроил package.json, установил mocha, chai. Запускаю npm test - выдает ошибку

D:\studying\Leetcode>npm test
npm WARN config global `--global`, `--local` are deprecated. Use `--location=global` instead.

> [email protected] test
> mocha ./**/*spec.mjs


SyntaxError[ @D:\studying\Leetcode\test\test.spec.mjs ]: Unexpected identifier
    at ESMLoader.moduleStrategy (node:internal/modules/esm/translators:117:18)
    at ESMLoader.moduleProvider (node:internal/modules/esm/loader:337:14)
    at async link (node:internal/modules/esm/module_job:70:21)

Структура директории и файлы здесь - https://github.com/ZakharovVladyslav/MochaProb