$ make test
Substitute test with lcov to run tests and generate an lcov_html output directory with HTML formatted coverage results.
$ make lcov
$ TEST_PHP_EXECUTABLE=sapi/cli/php sapi/cli/php [-c optional.ini] run-tests.php
$ make test TESTS=ext/<name>
OR
$ TEST_PHP_EXECUTABLE=sapi/cli/php sapi/cli/php [-c optional.ini] run-tests.php ext/<name>
This command will take any extension name or alternatively a valid glob for tests e.g. ext/pcre/tests/*.phpt. For finer grained testing you can pass in a specific .phpt file e.g. ext/pcre/tests/001.phpt