```ruby
require 'spec_helper'

shared_examples "a participation" do
	let(:project) { FactoryGirl.create(:project) }
	let!(:unfilled_participation) { described_class.create(project_id: project.id, user_uuid: nil, role: 'Some Role') }
	let!(:filled_participation) { described_class.create(project_id: project.id, user_uuid: 'someUserID', role: 'Some Other Role') }

	describe '.unfilled' do 
		it 'gets participations not already filled by a user' do
			expect(described_class.unfilled).to match_array [unfilled_participation]
		end
	end
end
```

Fix an error when running specs under spork
user
```ruby
shared_examples "a participation" do
	let(:project) { FactoryGirl.create(:project) }
	let!(:unfilled_participation) { described_class.create(project_id: project.id, user_uuid: nil, role: 'Some Role') }
	let!(:filled_participation) { described_class.create(project_id: project.id, user_uuid: 'someUserID', role: 'Some Other Role') }

	describe '.unfilled' do
		it 'gets participations not already filled by a user' do
			expect(described_class.unfilled).to match_array [unfilled_participation]
		end
	end
end
```
assistant