create react app can not find modul whatwg-fetch

Hello i make my app with CRA
And i simply tried yarn test
And i got this message

But i think i got module "whatwg-fetch"
what's wrong can be possible here?

I search this problem to google
But there is not much info.

Sorry I am beginner about jest and test
Actually don't know about this problem at all.

All i want is some clue for solve this problem.
I needs some help
Sorry for my poor English.