How to Validate NTP builds?

I just ported NTP to a new operation system and I want to validate my port. In the NTP source directory there are two directories with test code

• ./sntp/tests
• /tests

In the sntp/tests directory there's a binary built called tests_runner but no matter how or where I run it from nothing happens other than errors.

Documentation on these test seem slim, does anyone know how to make use of these tests?