See the original report in https://github.com/facebook/react/issues/10772#issuecomment-333242375.

The problem is that SVG is case sensitive, and so naïvely setting `tabIndex` and relying on insensitivity won't work with it.

The good news is it seems like `tabindex` is the only valid [SVG attribute](https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute) with this problem. We just missed it because it applies both to HTML and SVG.

I think the fix is to add it back to the whitelist. 
);
          expect(e.getAttribute('value')).toBe(null);
          expect(e.getAttribute('defaultValue')).toBe(null);
          expect(e.value).toBe('foo');
        },
      );
    });
    describe('selects', function() {
      var options;
      beforeEach(function() {
        options = [
          <option key={1} value="foo" id="foo">Foo</option>,
          <option key={2} value="bar" id="bar">Bar</option>,
          <option key={3} value="baz" id="baz">Baz</option>,
        ];
      });
      
      
      
      const expectSelectValue = (element, selected) => {
        if (!Array.isArray(selected)) {
          selected = [selected];
        }
        
        
        expect(element.getAttribute('value')).toBe(null);
        expect(element.getAttribute('defaultValue')).toBe(null);
        ['foo', 'bar', 'baz'].forEach(value => {
          const expectedValue = selected.indexOf(value) !== -1;
          var option = element.querySelector(`#${value}`);