How to test a redux thunk that dispatches actions in callbacks of asynchronous requests (not promises) using jest?

I have a redux thunk action that invokes an asynchronous callback service then dispatches additional actions based on the result:

import { UPDATE_TODOS } from '../../todos/actions/update-todos';
import { UPDATE_SUMMARY } from '../../todos/actions/update-summary';

import { newTodo } from '../../todos/services/fake-backend';

export function addTodo() {
    return (dispatch, getState) => {
        newTodo((err, todo) => {
            dispatch({ type: UPDATE_TODOS, todo });
            dispatch({ type: UPDATE_SUMMARY });
        });
    };
}

Emulating the latest docs I can write a test that is promise-based, but I am unsure how to make it callback-based:

import { expect } from 'jest';

import configureMockStore from 'redux-mock-store';
import thunk from 'redux-thunk';

import { UPDATE_TODOS } from '../../../todos/actions/update-todos';
import { addTodo } from '../../../todos/actions/add-todo';

const mockStore = configureMockStore([thunk]);

describe('addTodo', () => {
    it('creates new todo and dispatches UPDATE_TODOS', (done) => {
        const expectedActions = [
            { type: UPDATE_TODOS, todo: {} }
        ];

        const store = mockStore({ todos: [] });

        /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 
        * * * How do you re-write this to be callback-oriented * * *
        * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */    
        return store.dispatch(addTodo()).then(() => {
            expect(store.getActions()).toEqual(expectedActions);
        });
    });
})
```