title: Disabling parallel test execution when running test with coverage in Intellij
body: <p>What sbt task does intellij IDEA 14 use to run scala tests with coverage? I'm test my spark code and need to prevent them running in parallel.</p>
  
  <p>I've added the following to my <code>build.sbt</code> file and it prevents tests running in parallel when they aren't generating coverage reports:</p>
  
  <pre><code>parallelExecution in Test := false
  </code></pre>
  
  <p>However this has no effect when running with coverage. I tried using something similar, but with <code>ScctTest</code> instead of <code>Test</code>, but sbt couldn't resolve it.</p>
  
  <p>So, what coverage plugin does intellij use, and how can I disable parallel test execution when running tests with coverage? Running <code>sbt tasks</code> doesn't show anything containing the word <code>coverage</code>. I haven't enabled the <code>Emma</code> plugin in intellij - only the default <code>Coverage</code> one is enabled and it has no information.</p>