Appears to be working in Firefox but at least Chrome & Safari are broken. Should be a really recent regression so very few possible changes to blame...

Easiest repo: the todo list on our homepage.

'Invalid tag: div><img /><div'
      );
    });
  });
  describe('nesting validation', function() {
    var ReactTestUtils;
    beforeEach(function() {
      ReactTestUtils = require('ReactTestUtils');
    });
    it('warns on invalid nesting', () => {
      spyOn(console, 'error');
      ReactTestUtils.renderIntoDocument(<div><tr /><tr /></div>);
      expect(console.error.calls.length).toBe(1);
      expect(console.error.argsForCall[0][0]).toBe(
        'Warning: validateDOMNesting(...): <tr> cannot appear as a child of ' +
        '<div>. See div > tr.'
      );
    });
    it('warns on invalid nesting at root', () => {
      spyOn(console, 'error');
      var p = document.createElement('p');
      ReactDOM.render(<span><p /></span>, p);
      expect(console.error.calls.length).toBe(1);
      expect(console.error.argsForCall[0][0]).toBe(
        'Warning: validateDOMNesting(...): <p> cannot appear as a descendant ' +
        'of <p>. See p > ... > p.'
      );
    });
    it('warns nicely for table rows', () => {
      spyOn(console, 'error');