Sinion stubbing $q.all()

I am writing a test that involves Angular's fork of $q. Using Sinon, I am trying to stub it but not having a success...

  beforeEach(function() {
    module('info.deployments');
    inject(function($rootScope, $controller, $q) {
      $scope = $rootScope.$new();
      $controller('deploy.new', {
        $scope: $scope
      });
      $q = sinon.stub($q, 'all');
      $q = $q.all.withArgs(["foo", "boo"]).returns($q.all.resolve("first", "second"));
    });
  });

---

  describe('instantiation', function() {
    it('call promise', function() {
      return expect($q.all).to.have.been.called;
    });

---

TypeError: 'undefined' is not an object (evaluating '$q.all.withArgs')