I have the following folder structure to my nodeunit tests for a particular project:

```
/tests
/tests/basic-test.js
/tests/models/
/tests/models/model1-tests.js
/tests/models/model2-tests.js

```

My question is - how do I get nodeunit to automatically execute ALL of the tests in the **tests** folder, including the sub-directories contained within?

If I execute **nodeunit tests** it only executes basic-test.js and skips everything in the sub-folders by default.