title: Create React App cannot find tests
body: <p>I recently started a new project using create-react-app. I moved the <code>App.test.js</code> from outside the <code>/src</code> folder into a root level <code>/tests</code> folder so my folder structure looks like this now: </p>
  
  <pre><code>&gt; node_modules
  &gt; public
  &gt; src
     ...
     App.js
  &gt; tests
     App.test.js
  ...
  </code></pre>
  
  <p>And here's the entire App.test.js file:</p>
  
  <pre><code>import React from 'react';
  import ReactDOM from 'react-dom';
  import App from "../src/App";
  
  it('renders without crashing', () =&gt; {
    const div = document.createElement('div');
    ReactDOM.render(&lt;App /&gt;, div);
    ReactDOM.unmountComponentAtNode(div);
  });
  </code></pre>
  
  <p>So when I try <code>npm run test</code>, no tests get executed. It says that no tests can be found. How can I get create-react-app to recognize the new <code>/tests</code> folder as the new location for all tests and run them? </p>