title: GitHub invokes CI build after a pull request
body: <p><strong>Background</strong></p>
  
  <p>We are creating Pull-Requests on GitHub. After the PR is approved and the changes are successfully compiled and tested on CircleCI we push the button <strong>Merge pull request</strong>.</p>
  
  <p><a href="https://i.stack.imgur.com/RgWvA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RgWvA.png" alt="enter image description here"></a></p>
  
  <p>After pressing the button we would expect GitHub to immediately merge the PR but it first runs the very same build on CircleCI again and then it finishes the merge.</p>
  
  <p><strong>Question</strong></p>
  
  <p>How to merge a successful PR after pressing <strong>Merge pull request</strong> directly without running the CI build again? </p>
  
  <p>If it's not possible then is there a way how to reduce some overhead?</p>
  
  <p>For an unsuccessful PR, we want to prevent the merge though...</p>