React refs are not mounting on tests if inside a react-bootstrap component

I am using:

• "react": "0.13.3"
• "react-bootstrap": "0.26.4"

Every time when I use a ref in a node inside a <Modal /> or other React Bootstrap component, they are correctly mounted when I run the system normally, but at test environment they just disappear.

I have tried all the render strategies of the react test utils, but seems to have no difference.