Just by installing the extension and not enabling any beta feature, AFAIK (long story: http://paste.debian.net/111811/ ).
$ php5 phpunit.php
[...]
PHPUnit 3.7.37 by Sebastian Bergmann.
Configuration read from /srv/vagrant/mediawiki/tests/phpunit/suite.xml
[...]
........................................................... 2183 / 14398 ( 15%)
.....................FPHP Fatal error: Call to a member function getOption() on a non-object in /srv/vagrant/mediawiki/extensions/BetaFeatures/BetaFeaturesHooks.php on line 115
PHP Stack trace:
PHP 1. {main}() /srv/vagrant/mediawiki/tests/phpunit/phpunit.php:0
PHP 2. MediaWikiPHPUnitCommand::main() /srv/vagrant/mediawiki/tests/phpunit/phpunit.php:160
PHP 3. PHPUnit_TextUI_Command->run() /srv/vagrant/mediawiki/tests/phpunit/MediaWikiPHPUnitCommand.php:42
PHP 4. PHPUnit_TextUI_TestRunner->doRun() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/TextUI/Command.php:176
PHP 5. PHPUnit_Framework_TestSuite->run() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/TextUI/TestRunner.php:350
PHP 6. PHPUnit_Framework_TestSuite->run() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestSuite.php:709
PHP 7. PHPUnit_Framework_TestSuite->run() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestSuite.php:709
PHP 8. PHPUnit_Framework_TestSuite->runTest() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestSuite.php:749
PHP 9. MediaWikiTestCase->run() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestSuite.php:779
PHP 10. PHPUnit_Framework_TestCase->run() /srv/vagrant/mediawiki/tests/phpunit/MediaWikiTestCase.php:133
PHP 11. PHPUnit_Framework_TestResult->run() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestCase.php:783
PHP 12. PHPUnit_Framework_TestCase->runBare() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestResult.php:648
PHP 13. PHPUnit_Framework_TestCase->runTest() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestCase.php:838
PHP 14. ReflectionMethod->invokeArgs() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestCase.php:988
PHP 15. UserTest->testEditCount() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestCase.php:988
PHP 16. User->addToDatabase() /srv/vagrant/mediawiki/tests/phpunit/includes/UserTest.php:218
PHP 17. User->saveOptions() /srv/vagrant/mediawiki/includes/User.php:3615
PHP 18. wfRunHooks() /srv/vagrant/mediawiki/includes/User.php:4775
PHP 19. Hooks::run() /srv/vagrant/mediawiki/includes/GlobalFunctions.php:4031
PHP 20. call_user_func_array() /srv/vagrant/mediawiki/includes/Hooks.php:206
PHP 21. BetaFeaturesHooks::updateUserCounts() /srv/vagrant/mediawiki/includes/Hooks.php:206
Fatal error: Call to a member function getOption() on a non-object in /srv/vagrant/mediawiki/extensions/BetaFeatures/BetaFeaturesHooks.php on line 115
Call Stack:
0.0005 252912 1. {main}() /srv/vagrant/mediawiki/tests/phpunit/phpunit.php:0 2.4455 25291488 2. MediaWikiPHPUnitCommand::main() /srv/vagrant/mediawiki/tests/phpunit/phpunit.php:160 2.4456 25303960 3. PHPUnit_TextUI_Command->run() /srv/vagrant/mediawiki/tests/phpunit/MediaWikiPHPUnitCommand.php:42 44.9965 200894920 4. PHPUnit_TextUI_TestRunner->doRun() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/TextUI/Command.php:176 45.0378 201215464 5. PHPUnit_Framework_TestSuite->run() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/TextUI/TestRunner.php:350 45.7795 201217592 6. PHPUnit_Framework_TestSuite->run() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestSuite.php:709 445.1807 348383968 7. PHPUnit_Framework_TestSuite->run() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestSuite.php:709 445.6279 348769688 8. PHPUnit_Framework_TestSuite->runTest() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestSuite.php:749 445.6279 348769688 9. MediaWikiTestCase->run() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestSuite.php:779 445.6303 348769928 10. PHPUnit_Framework_TestCase->run() /srv/vagrant/mediawiki/tests/phpunit/MediaWikiTestCase.php:133 445.6303 348769928 11. PHPUnit_Framework_TestResult->run() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestCase.php:783 445.6304 348770872 12. PHPUnit_Framework_TestCase->runBare() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestResult.php:648 445.6311 348794224 13. PHPUnit_Framework_TestCase->runTest() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestCase.php:838 445.6311 348794984 14. ReflectionMethod->invokeArgs() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestCase.php:988 445.6311 348795240 15. UserTest->testEditCount() /srv/vagrant/mediawiki/vendor/phpunit/phpunit/PHPUnit/Framework/TestCase.php:988 445.6315 348798392 16. User->addToDatabase() /srv/vagrant/mediawiki/tests/phpunit/includes/UserTest.php:218 445.6575 348798392 17. User->saveOptions() /srv/vagrant/mediawiki/includes/User.php:3615 445.6592 348835112 18. wfRunHooks() /srv/vagrant/mediawiki/includes/User.php:4775 445.6592 348835160 19. Hooks::run() /srv/vagrant/mediawiki/includes/GlobalFunctions.php:4031 445.6593 348836080 20. call_user_func_array() /srv/vagrant/mediawiki/includes/Hooks.php:206 445.6593 348836520 21. BetaFeaturesHooks::updateUserCounts() /srv/vagrant/mediawiki/includes/Hooks.php:206
Version: unspecified
Severity: normal