$ vendor/bin/phpunit -vv
Moodle 4.0dev (Build: 20210219), b8da4266da75606e977bb9f89cb9a7991f410232
Php: 7.4.15, pgsql: 9.6.20, OS: Darwin 20.3.0 x86_64
PHPUnit 9.5.2 by Sebastian Bergmann and contributors.

Runtime:       PHP 7.4.15
Configuration: /Users/stronk7/git_moodle/testing/phpunit.xml
Warning:       Your XML configuration validates against a deprecated schema.
Suggestion:    Migrate your XML configuration using "--migrate-configuration"!

...........................................................    59 / 16517 (  0%)
...
...
........................................................    16517 / 16517 (100%)

Time: 01:00:28.745, Memory: 1.84 GB

There was 1 skipped test:

1) core_dml_mysqli_read_slave_testcase::test_real_readslave_connect_fail
Not mysql

/Users/stronk7/git_moodle/testing/lib/dml/tests/dml_mysqli_read_slave_test.php:70

OK, but incomplete, skipped, or risky tests!
Tests: 16517, Assertions: 3357638, Skipped: 1.