@photodude do you have na idea what we can do to work around the memory limit? I assume setting the memory_limit to a high value is not the solution if possible.

reggarding memory limit, could this work? http://blog.simplytestable.com/setting-the-php-memory-limit-for-travis-ci/

@rdeutz I tested with the default Trusty memory limit for hhvm using ini_get("memory_limit") returns 17179869184 available and fails

Eventually I found a way to change the hhvm memory limit and set it to a lower limit then to unlimited. @andrepereiradasilva the post you referenced was my starting point (see my comment on that post), but that resulted in a different error cp: cannot create regular file. I did find a way around that
for unlimited ini_get("memory_limit") returns 9223372036854775807
And that still fails.

In all cases memory_get_peak_usage() returns 2097152

The Test causing Fatal error: request has exceeded memory limit in /home/travis/build/photodude/joomla-cms/libraries/vendor/phpunit/php-timer/src/Timer.php on line 97 is 'FinderIndexerStemmerPorter_EnTest::testStemWrongLanguage'"

I since I used --debug with phpunit to acquire a list of tests (an incomplete list) that errored or failed.
You can get that list in issue #10220
I have reported the slow builds with Trusty to Travis-CI travis-ci/travis-ci#5980

I'm trying to see if there is a way to skip the tests having issues so we can get a report of the other issues. So far the --exclude-group didn't work (even with adding the @group to the failed test).