RSpec with devise test helpers


I’ve set my Rails (engine) project to include devise and other tools
like FactoryGirl.
I’d like to write some tests with contexts around anon/authenticated

In my spec_helper.rb’s RSpec.configure block, I have this:

config.include Devise::TestHelpers, type: :controller

Which gives me this, when running rspec:

  1. PropertiesController GET ‘index’ returns http success
    Failure/Error: Unable to find matching line from backtrace
    no implicit conversion of nil into Hash

merge!' # /Users/phendrick/.rvm/gems/removed_email_address@domain.invalid/gems/devise-3.0.0/lib/devise/test_helpers.rb:31:inblock in warden’

Without the TestHelpers module included, the specs run (obviously none
of them have devise logic in them just yet).

Any ideas what’s causing this error and how I can resolve it?