title: Remove "Remaining deprecation notices" in Symfony 2.8
body: <p>I'm new on Symfony and PHPUnit. </p>
  
  <p>I would like to run some tests, there are a lot of deprecation notices. But it does not matter because I'll stay on Symfony 2.8 for now. Do you know if it's possible to remove them?</p>
  
  <p><a href="https://i.stack.imgur.com/w9BSd.png" rel="noreferrer"><img src="https://i.stack.imgur.com/w9BSd.png" alt="enter image description here"></a></p>
  
  <p>I try to find out by myself, but it's not working, have you got some ideas for me folks ? </p>
  
  <p><a href="https://stackoverflow.com/questions/34284480/how-to-remove-the-deprecation-warnings-in-symfony-2-7">How to remove the deprecation warnings in Symfony 2.7?</a></p>
  
  <p><a href="https://stackoverflow.com/questions/28850809/disable-deprecated-warning-in-symfony-2-7">Disable deprecated warning in Symfony 2(.7)</a></p>
  
  <hr>
  
  <p><strong>EDIT :</strong></p>
  
  <p>Reference to the answer of @LBA</p>
  
  <p>My screenshot is not really about the error of the AsseticBundle, but about the "Remaining deprecation notices (220)". I would like to know if there is a flag somewhere to display, or not, these warnings. I would like to just have the result of my test suit. Is that possible?</p>