TypeError: config.headers.has is not a function

Question

Getting errors when executing test cases in Redux Tool Kit query,

• Used React Native Testing Library for rendering components.

An unhandled error occurred processing a request for the endpoint "getProducts".
    In the case of an unhandled error, no tags will be "provided" or "invalidated". TypeError: config.headers.has is not a function  

jestSetup.ts:

jest.useFakeTimers()
jest.mock('react-native/Libraries/Animated/NativeAnimatedHelper');
jest.mock('node-fetch');
require('jest-fetch-mock').enableMocks()

Tried with mocking node-fetch