Enzyme test: TypeError: expect(...).find is not a function

Why is .find not a function in the code context below?

import React from 'react';
import { shallow } from 'enzyme';
import toJson from 'enzyme-to-json';
import { AuthorizedRoutesJest } from './AuthorizedRoutes';

// Components
import {
  Main
} from '../../components';

const wrapper = shallow(<AuthorizedRoutesJest />);

describe('<AuthorizedRoutes /> component', () => {
  it('should render', () => {
    const tree = toJson(wrapper);
    expect(tree).toMatchSnapshot();
    expect(wrapper).toHaveLength(1);
  });

  it('should contain a Main component', () => {
    expect(wrapper).find(Main).toHaveLength(1);
  });
});

Summary of all failing tests FAIL client/containers/Routes/AuthorizedRoutes.test.js

AuthorizedRoutes component › should contain a Main component

TypeError: expect(...).find is not a function