Mail from the Travis team:
Thanks for the email. I have set up s3fs-fuse/s3fs-fuse with our alpha
testing stack which may allow you to use FUSE.
To use it, add the following to your .travis.yml:
dist: trusty
Please keep in mind that the service may become unavailable without
notice, and change details. We welcome your feedback as to what works
and what does not with this setup.