[Mocha] Limitation at testing async function

In case of promise is NOT fullfilled forever, mocha doens't give any information about this.
See test below.

    describe('test', function () {
        it('test', async () => {
            await new Promise((r, j) => {});
            console.log('hello');
        });
    })

This gives only following result in terminal

    test
      test
Waiting for the debugger to disconnect...
Killed

No more informations!