phpunit is not currently using php-pear-lib-r1 eclass and as a result, it has no way of discovering the pear.phpunit.de pear channel. Currently it does install but only when one of its dependencies discovers the same channel. Reproducible: Always
Future versions of phpunit will be distributed using the phar file so that we do not have to deal with this dependency nonsense anymore. Find bump of phpunit in CVS.