Squire JS Mocking Not working in unit test

I am trying to use squirejs in a sample test but its not working. I have a couple of modules

Person.js

define(['scripts/boat','scripts/chicken'], function (myBoat,chook) { 

  var name, age;

  var api = {};


  api.setName = function (names) {
    name = names;
  };

  api.getName = function () {
    return name;
  };

  api.getBoatSpeed = function() {
    myBoat.setDriver(3);
    return myBoat.maximumSpeed();
  };

  api.getMarshal = function() {
    return chook.getFeathers();
  };


  return api;

});

Chicken.js

define(
[], function () {



return {

    getFeathers : function () {
        console.log('getFeathers called from actual module');
        return 100;
    }

};

});

In my test i am running a beforeEach

beforeEach(function(done) {
    injector = new Squire();
    injector.mock("scripts/chicken", mockFeatherService)
    .require(['scripts/person'], function (component) {
      myChicken = component;
    });
    done();
  });

and my mockfeatherservice looks like

var mockFeatherService = {

      getFeathers : function () {
        console.log('getFeathers called from MOCK module');
        return 1;
      }
    };

test which fails as it always returns 100 rather than the mocked 1.

 it('Its a chicken test', function() {

   expect(pers.getMarshal()).to.equal(1);

my issue is that the actual method 'getFeathers' seems to be called from the actual module rather than the mock created in the test - what am i doing wrong?

Test output :

29 08 2015 23:54:58.197:INFO [watcher]: Changed file "/Users/russellholmes/Desktop/require/test/test.js".
LOG: 'getFeathers called from actual module'
LOG: 100
LOG: 'getFeathers called from actual module'
Chrome 44.0.2403 (Mac OS X 10.10.3) When a person Its a chicken test FAILED
    AssertionError: expected 100 to equal 1