Testing views that use CanCan and Devise with RSpec

I was trying to test a simple index view, which has following code inside:

- if can? :destroy, MyModel
  %th Options

MyModelsController has following options (Inherited Resources + CanCan + Devise):

class MyModelsController < ApplicationController
  inherit_resources
  nested_belongs_to :mymodel
  before_filter :authenticate_user!
  load_and_authorize_resource :project
  load_and_authorize_resource :mymodel, :through => :project

When running specs, it crashes at the line - if can? :destroy, MyModel

Failure/Error: render
   ActionView::Template::Error:
      undefined method `authenticate' for nil:NilClass

There's no traceback, nothing to base on...

I thought that maybe I'm not authorized and signed when testing views, but Devise::TestHelpers should only be included in controller tests (and that's how I have it).

I was trying to override method can? in both Ability and the controller, but that gave no effect.