title: MS Test randomly executes from Project Build Output path
body: <p>Whilst investigating an issue, whereby some unit tests were failing if using "Run All" from Test Explorer, I discovered that, if run in isolation or some other subset of all, they <strong>succeeded</strong> because they were <strong>not being deployed</strong> to a new test .\Out folder (as verified in the debug Modules window).</p>
  
  <p>The issue of the failing tests turned out to be a missing assembly, <em>which I managed to resolve</em> but my question is: <strong>why</strong> are the tests <em>sometimes</em> run from my common build Output path (eg. ..\bin) and not <em>always</em> deployed to a clean TestResults....\Out location?</p>
  
  <p>[nb. <em>I should add, the solution is <strong>not</strong> using a TestSettings file</em>]</p>