Ошибка покрытия кода модуля PHP

PHPunit работает, но я получаю эту ошибку покрытия кода и не получаю отчет о покрытии кода.

Кто-нибудь знает, как это исправить?

Спасибо,

Демиан.

demian@dimbo-TP:/var/www/z2d2/tests$ phpunit
PHPUnit 3.5.15 by Sebastian Bergmann.

...

Time: 1 second, Memory: 13.00Mb

OK (3 tests, 4 assertions)

Generating code coverage report, this may take a moment.PHP Fatal error:  Class 'PHP_Token_Stream' not found in /usr/share/php/PHP/Token/Stream/CachingFactory.php on line 68
PHP Stack trace:
PHP   1. {main}() /usr/bin/phpunit:0
PHP   2. PHPUnit_TextUI_Command::main() /usr/bin/phpunit:49
PHP   3. PHPUnit_TextUI_Command->run() /usr/share/php/PHPUnit/TextUI/Command.php:129
PHP   4. PHPUnit_TextUI_TestRunner->doRun() /usr/share/php/PHPUnit/TextUI/Command.php:188
PHP   5. PHP_CodeCoverage_Report_HTML->process() /usr/share/php/PHPUnit/TextUI/TestRunner.php:363
PHP   6. PHP_CodeCoverage_Report_HTML->addItems() /usr/share/php/PHP/CodeCoverage/Report/HTML.php:135
PHP   7. PHP_CodeCoverage_Report_HTML_Node_Directory->addFile() /usr/share/php/PHP/CodeCoverage/Report/HTML.php:214
PHP   8. PHP_CodeCoverage_Report_HTML_Node_File->__construct() /usr/share/php/PHP/CodeCoverage/Report/HTML/Node/Directory.php:156
PHP   9. PHP_CodeCoverage_Util::getLinesToBeIgnored() /usr/share/php/PHP/CodeCoverage/Report/HTML/Node/File.php:169
PHP  10. PHP_Token_Stream_CachingFactory::get() /usr/share/php/PHP/CodeCoverage/Util.php:271

Fatal error: Class 'PHP_Token_Stream' not found in /usr/share/php/PHP/Token/Stream/CachingFactory.php on line 68

Call Stack:
    0.0002     326940   1. {main}() /usr/bin/phpunit:0
    0.0434     666604   2. PHPUnit_TextUI_Command::main() /usr/bin/phpunit:49
    0.0435     667084   3. PHPUnit_TextUI_Command->run() /usr/share/php/PHPUnit/TextUI/Command.php:129
    0.0943    4312004   4. PHPUnit_TextUI_TestRunner->doRun() /usr/share/php/PHPUnit/TextUI/Command.php:188
    1.1150   13272196   5. PHP_CodeCoverage_Report_HTML->process() /usr/share/php/PHPUnit/TextUI/TestRunner.php:363
    1.1521   14100768   6. PHP_CodeCoverage_Report_HTML->addItems() /usr/share/php/PHP/CodeCoverage/Report/HTML.php:135
    1.1521   14101320   7. PHP_CodeCoverage_Report_HTML_Node_Directory->addFile() /usr/share/php/PHP/CodeCoverage/Report/HTML.php:214
    1.1521   14103132   8. PHP_CodeCoverage_Report_HTML_Node_File->__construct() /usr/share/php/PHP/CodeCoverage/Report/HTML/Node/Directory.php:156
    1.1595   14122724   9. PHP_CodeCoverage_Util::getLinesToBeIgnored() /usr/share/php/PHP/CodeCoverage/Report/HTML/Node/File.php:169
    1.1595   14123076  10. PHP_Token_Stream_CachingFactory::get() /usr/share/php/PHP/CodeCoverage/Util.php:271