How to use Mocha and Jest with TypeScript without conflicts?

Question

I\'m trying to install Mocha and Jest with types on one project. We use strict typecheck, so I get errors related to conflicting globals type.

I\'ve tried to create ambi

Answer 1

As of August 2019, this appears to have been fixed on master, but a new version has not been released yet.

In the meantime, I was able to address these errors by adding the following to one of my definitions:

declare module '@jest/types/build/Global' {
  interface DescribeBase extends mocha.SuiteFunction {}
  interface ItBase extends mocha.TestFunction {}
}

Answer 2

I searched through package lock file to see which dependencies use @types/jest and found out that in my case I still have ts-jest in my project which I removed and conflicts disappeared