Velocity not running unit test with Mocha on MeteorJS

I have written some unit tests with Mocha. The framework is MeteorJS and the test runner is Velocity. When I am running Meteor, Velocity is running only the sample tests, which are created by Velocity itself when creating the test directory. My own tests are not running, even though the files are being listed in "Test files" on the Velocity UI. Does anyone know how I can make Velocity run my tests?

I installed mocha on MeteorJS using the command meteor add mike-mocha.

Any help would be appreciated!