When Xdebug 2 is loaded and no code coverage is requested then use xdebug.default_enable=0 for running PHPT tests. When Xdebug 2 is loaded and code coverage is requested the use xdebug.coverage_enable=1 for running PHPT tests.
When Xdebug 2 is loaded and no code coverage is requested then use xdebug.default_enable=0 for running PHPT tests.
When Xdebug 2 is loaded and code coverage is requested the use xdebug.coverage_enable=1 for running PHPT tests.

Firehed/phpunit,sebastianbergmann/phpunit