Cannot find name 'describe' Typescript error

error TS2582: Cannot find name 'describe'. Do you need to install type definitions for a test runner? Try `npm i --save-dev @types/jest` or `npm i --save-dev @types/mocha`

Typescript error: Return type of exported function has or is using private name 'X'

Autocomplete for typescript shows wrong path on VSCode

This issue was equally occurring when I configured paths in my tsconfig.