We have some tests in our testsuite that are functionally disabled because they run if $TRAVIS, which is always true if the TRAVIS environment variable is not set (fun shell fact!). Many of these deal with our TLS certificate handling, and they are broken in CI for various reasons depending on the OS.

We should probably investigate what's wrong and how to fix it, since these tests are never run unless TRAVIS is set to a shell command returning false. I should note that at least some of them pass on my Ubuntu 23.10 laptop, so simply reproducing on Linux is not sufficient to trigger the problem.