Recursively run all tests in test directory using mocha

gistfile1.js

// this will find all files ending with _test.js and run them with Mocha. Put this in your package.json


"scripts": {
  "test": "find ./tests -name '*_test.js' | xargs mocha -R spec"
},

for me its working using --recursive

"scripts": {
    "test": "mocha --recursive --exit"
}