From the root of your Drupal installation, run
php vendor/bin/phpunit -c core modules/custom/patternlab/tests/src/Unit/MustacheTest.php
For more options, see the Handbook page Running PHPUnit tests.
From the root of your Drupal installation, run
php vendor/bin/phpunit -c core modules/custom/patternlab/tests/src/Unit/MustacheTest.php
For more options, see the Handbook page Running PHPUnit tests.