There is a race condition in tests run by prove from Test::Harness.

Steps to reproduce (inconsistently):

Run the following command two times in a row:

prove -l t/tests.t :: --tests 'User::Edit'

The second time, both tests should fail with:

Catalyst error screen: Caught exception in MusicBrainz::Server::View::Default->process "Couldn't connect to the renderer. at /musicbrainz-server/lib/MusicBrainz/Server/View/Base.pm line 36."

Workaround:

Delete socket file /tmp/musicbrainz-server.socket.