How do I run the GruntJS tests?

I just cloned the gruntjs repository.

How do I actually run the tests for GruntJS?

(I don't mean I want to run my own tests using GruntJS. I mean that I want to run the tests for GruntJS itself.)

grunt test should do the trick.

Grunt eats its own dog food.

git clone https://github.com/gruntjs/grunt
cd grunt
grunt test

Or, like any grunt repository (because the package.json is well-formed):

cd grunt
npm test