```ruby
require 'spec_helper'

describe StripeEvent::WebhookController do
  before do
    StripeEvent.clear_subscribers!
    @base_params = { :use_route => :stripe_event }
  end

  context "with valid event data" do
    let(:event_id) { 'evt_charge_succeeded' }

    before do
      @event = stub_event(event_id)
    end

    it "should be successful" do
      post :event, @base_params.merge(:id => event_id)
      response.should be_success
    end
  end

  context "with invalid event data" do
    let(:event_id) { 'evt_invalid_id' }

    before do
      stub_event(event_id, 404)
    end

    it "should deny access" do
      post :event, @base_params.merge(:id => event_id)
      response.code.should == '401'
    end
  end
end
```

Remove extra ivar in spec
user
```ruby
require 'spec_helper'

describe StripeEvent::WebhookController do
  before do
    StripeEvent.clear_subscribers!
    @base_params = { :use_route => :stripe_event }
  end

  context "with valid event data" do
    let(:event_id) { 'evt_charge_succeeded' }

    before do
      stub_event(event_id)
    end

    it "should be successful" do
      post :event, @base_params.merge(:id => event_id)
      response.should be_success
    end
  end

  context "with invalid event data" do
    let(:event_id) { 'evt_invalid_id' }

    before do
      stub_event(event_id, 404)
    end

    it "should deny access" do
      post :event, @base_params.merge(:id => event_id)
      response.code.should == '401'
    end
  end
end
```
assistant