Stub React component dependency with proxyquire

I want to stub a dependency with proxyquire in a unit test (the dependency is a React component):

import proxyquire from 'proxyquire';
let Parent = proxyquire
    .noCallThru()
    .load('../../src/js/components/client.jsx', {
        './Child.jsx': React.Component
    });

And get an error:

Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object.

I've tried to change React.Component to be just 'div', but it makes no difference.