title: Warning while testing specs on postgres: there is no transaction in progress
body: <p>For each step of test occurs 2 lines: </p>
  
  <pre><code>WARNING:  there is already a transaction in progress
  NOTICE:  there is no transaction in progress
  </code></pre>
  
  <p>With Spork lines following triples:</p>
  
  <pre><code>NOTICE:  there is no transaction in progress
  NOTICE:  there is no transaction in progress
  NOTICE:  there is no transaction in progress
  WARNING:  there is already a transaction in progress
  WARNING:  there is already a transaction in progress
  WARNING:  there is already a transaction in progress
  </code></pre>
  
  <p>I don't know maybe it's important, just warned. GemFile:</p>
  
  <pre><code>group :test do
    gem 'rspec-rails'
    gem 'factory_girl_rails'
    gem 'spork-rails'
    gem 'capybara'
    gem 'database_cleaner'
  end
  </code></pre>
  
  <p>all customized, so there is no need for develop group, and it not helps anyway. <a href="https://gist.github.com/3744332">this is spec_helper</a>.I found, that it is PostgreSQL feature, but I could not find how to fix it.
  I will be grateful for the assistance</p>