Run the [`fixtures/ssr` test harness](https://github.com/facebook/react/tree/master/fixtures/ssr). In the terminal, the following warning is logged:

```
Warning: Unknown prop `onClick` on <a> tag. Remove this prop from the element. For details, see https://fb.me/react-unknown-prop
  in a (at Page.js:12)
  in p (at Page.js:18)
  in div (at Page.js:17)
  in Page (at App.js:12)
  in div (at App.js:10)
  in body (at Chrome.js:17)
  in html (at Chrome.js:9)
  in Chrome (at App.js:9)
  in App (at render.js:18)
```

SSR behavior should match client-side behavior and not warn for a valid attribute.
expect(node).not.toBe(null);
      expect(node.nodeType).toBe(type);
      expect(node.nodeValue).toMatch(value);
    }
    function expectTextNode(node, text) {
      if (ReactDOMFeatureFlags.useFiber) {
        
        expectNode(node, TEXT_NODE_TYPE, text);
      } else {
        
        
        expectNode(node, COMMENT_NODE_TYPE, / react-text: [0-9]+ /);
        if (text.length > 0) {
          node = node.nextSibling;
          expectNode(node, TEXT_NODE_TYPE, text);
        }
        expectNode(node.nextSibling, COMMENT_NODE_TYPE, / \/react-text /);
      }
    }
    function expectEmptyNode(node) {