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tf tree in namespace

I'm trying to see my tf tree (rqt_tf_tree, tf view_frames, etc.) for a namespaced robot. I can't seem to get the system to behave the way I want it to. I have tried setting the ROS_NAMESPACE environment variable to my namespace, and then running rosrun tf view_frames and rqt_tf_tree, but it simply shows that no tf tree exists. I can see the tree exists in RViz, as well as by echoing /namespace/tf and /namespace/tf_static. Any ideas?