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**Do you want to request a *feature* or report a *bug*?** Bug, I guess

**What is the current behavior?** 


```
  console.error node_modules/fbjs/lib/warning.js:33
    Warning: Detected multiple renderers concurrently rendering the same context provider. This is currently unsupported.
```

Steps to reproduce the behavior:
1. `git clone https://github.com/stereobooster/react-context-issue`
2. `cd react-context-issue`
3. `yarn`
4. `yarn test`

**What is the expected behavior?** no warning

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?** React 16.4. Browser not affected, because error is in node.js

Open this because of https://github.com/facebook/react/pull/13127#issuecomment-402527012

Issue happens because of Enzyme (https://github.com/airbnb/enzyme/issues/1693), code is unreleased, so I copy-pasted it from master. 

I'm looking for advice or some clue on how to fix this, so I would be able to create PR in Enzyme repo (or in React repo if this is the case). Thank you.


return ReactDOM.render(
        <Surface>
          <Shape onClick={onClick} />
        </Surface>,
        container,
      );
    }
    function doClick(instance) {
      const path = ReactDOM.findDOMNode(instance).querySelector('path');
      path.dispatchEvent(
        new MouseEvent('click', {
          bubbles: true,
        }),
      );
    }
    const onClick1 = jest.fn();
    let instance = render(onClick1);
    doClick(instance);
    expect(onClick1).toBeCalled();
    const onClick2 = jest.fn();
    instance = render(onClick2);
    doClick(instance);
    expect(onClick2).toBeCalled();
  });
  it('can concurrently render with a "primary" renderer while sharing context', () => {
    const CurrentRendererContext = React.createContext(null);
    function Yield(props) {