How to stub RSpec update action?

New to RSpec and having trouble stubbing out an update method (needs to be stubbed) and am running into this error. I have tried a bunch of different ways and can't seem to solve it. I tried to include only the necessary code.

/spec/controllers/admin/business_controller_spec.rb:

require 'spec_helper'

RSpec.describe Admin::BusinessesController, type: :controller do
  render_views

  before(:all) do
    @business = build_stubbed(:business)
  end

  describe '#update' do
    before(:each) do
      allow(Business).to receive(:find).and_return(@business)
      @new_name = Faker::Company.name
      @params = { id: @business.id, business: { name: @new_name } }
    end

    it 'updates business name' do
      expect(@business).to receive(:update_attributes).with(name: @new_name, confirm_flag: @business.confirm_flag, phone_primary: @business.phone_primary).and_return(true)
      xhr :patch, :update, id: @business.id, business: { name: @new_name }
      expect(@business.name).to eq(@new_name)
    end
  end
end

/app/controllers/admin/businesses_controller.rb

class Admin::BusinessesController < Admin::BaseAdminController

  def update
    @business.update_attributes(business_params)
  end

  def business_params
    params.require(:business).permit(:name, :active_flag).merge(confirm_flag: true, phone_primary: '')
  end

end

When I run this test I get this error:

Failures:

  1) Admin::PartnersController#update updates partner name
 Failure/Error: @partner.update_attributes(partner_params)

   #<Partner:0x007fc43c4f5738> received :update_attributes with unexpected arguments
     expected: ({:name=>"Fadel, Larson and Hettinger", :confirm_flag=>true, :phone_primary=>"7832900175"})
          got: ({"name"=>"Fadel, Larson and Hettinger", "confirm_flag"=>true, "phone_primary"=>""})
   Diff:
   @@ -1,4 +1,4 @@
   -[{:name=>"Fadel, Larson and Hettinger",
   -  :confirm_flag=>true,
   -  :phone_primary=>"7832900175"}]
   +[{"name"=>"Fadel, Larson and Hettinger",
   +  "confirm_flag"=>true,
   +  "phone_primary"=>""}]

So it looks like the phone_primary is causing the problem and I change my test expectation line to be:

  describe '#update' do
    before(:each) do
      allow(Business).to receive(:find).and_return(@business)
      @new_name = Faker::Company.name
      @params = { id: @business.id, business: { name: @new_name } }
    end

    it 'updates business name' do
      expect(@business).to receive(:update_attributes).with(name: @new_name, confirm_flag: @business.confirm_flag, **phone_primary: ''**).and_return(true)
      xhr :patch, :update, id: @business.id, business: { name: @new_name }
      expect(@business.name).to eq(@new_name)
    end
  end

and i get the failure:

Failures:

  1) Admin::PartnersController#update updates partner name
 Failure/Error: expect(@partner4.name).to eq(@new_name)

   expected: "Flatley Inc"
        got: "Samara Kuhic"

And now the names aren't matching