```ruby
require 'spec_helper'

describe 'seed_stack::worker' do
  on_supported_os.each do |os, facts|
    context "on #{os}" do
      let(:facts) do
        facts
      end

      it { should compile }
    end
  end
end
```

Add concat_basedir fact to worker test
user
```ruby
require 'spec_helper'

describe 'seed_stack::worker' do
  on_supported_os.each do |os, facts|
    context "on #{os}" do
      let(:facts) do
        facts.merge({:concat_basedir => '/tmp/puppetconcat'})
      end

      it { should compile }
    end
  end
end
```
assistant