Basic React Tests Failing after Implementing Redux

I am trying to practice using Redux/testing React, and have a simple app set up with the Facebook Create-React Kit.

I have a basic test that is just supposed to make sure an element renders:

it('renders without crashing', () => {
  const div = document.createElement('div');
  ReactDOM.render( < Companies / > , div);
});

It was passing until I implemented Redux in that element, like so:

function select(state) {
  return {companies: state};
}

export default connect(select)(Companies);

Now, despite the element certainly rendering in the browser, and the redux implementation working just fine, I am getting this message in the test results:

Invariant Violation: Could not find "store" in either the context or props of "Connect(Companies)". Either wrap the root component in a <Provider>, or explicitly pass "store" as a prop to "Connect(Companies)".

I thought I had done this in my routes with this:

let store = createStore(companyApp);

ReactDOM.render(
  <Provider store={store}>
   <Router history={browserHistory}>
      <Route path="/" component={App}>
        <Route path="/companies" component={Companies}>
            <Route path=":id" component={Company}/>
        </Route>
     < /Route>
   </Router>
 </Provider>, document.getElementById('root'));

but I must be missing something.