Mocha - Exceptions outside tests are silent when using --delay flag

index.js

setTimeout(function() {
  require('./some-test');
  run();
}, 100);

package.json

brennan@maru:~/code/mocha-requirejs-silent-errors$ cat package.json 
{
  "name": "mocha-silent-exception-sample",
  "version": "1.0.0",
  "devDependencies": {
    "mocha": "2.2.4"
  },
  "scripts": {
    "test": "mocha --delay index.js"
  }
}

some-test.js

throw new Error('boom');
console.log('loaded "dep"');

Run npm test and notice that no exception is thrown.