I've disabled the integration tests on Travis, because they require the raw flow graphs produced by pyflowgraph and rflowgraph. On a local system we can just assume everything is properly installed, but that won't fly on Travis. To make it work on Travis, we need to connect the builds to each other. I'm not experienced in this area but maybe Travis' build artifacts can help.
I've disabled the integration tests on Travis, because they require the raw flow graphs produced by pyflowgraph and rflowgraph. On a local system we can just assume everything is properly installed, but that won't fly on Travis. To make it work on Travis, we need to connect the builds to each other. I'm not experienced in this area but maybe Travis' build artifacts can help.