Blake

This is due to your firewall. I have to turn mine off when running unit tests (I can't click fast enough to allow it). System Preferences -> Security and Privacy...

Yeah, sorry, I realized a little after that adding it to the list was not viable as it was random every time. Hopefully disabling your firewall is an option for...

You're registering the exception handler on the HttpServer, not the Vertx instance/context which the tests are run on.