title: TFS 2017 tests taking suspiciously long
body: <p>I have a TFS 2017 build definition with a "Visual Studio Test", which runs too long and causes the build to be cancelled. I would like to know why the timeout occurs, the test log is following:</p>
  
  <p><code>2017-08-30T10:03:21.5254342Z Passed   ReportAnalyzer_GetBlabla_SimpleTest
  2017-08-30T10:26:53.4446552Z ##[debug]FindFiles.FindMatchingFiles(rootFolder = D:\TfsBuildAgents\RmsBuild\_work\8\s\TestResults, matchPattern = *.trx, includeFiles = True, includeFolders = False
  [...]
  2017-08-30T10:26:53.4915336Z ##[error]The operation was canceled.</code></p>
  
  <p>So there is a passing test at 10:03 and at 10:26 a cancellation of the build (which at this point is expected).</p>
  
  <p>I do not know what is happening after 10:03... any help? Should I somehow increase the verbosity? Is is possible a bogus test is running?</p>
  
  <p>Using Microsoft Visual Studio Team Foundation Server Version 15.105.25910.0</p>
  
  <p>The test assemblies step has the following setup:
  Test Assembly <code>**\*Tests\**\$(BuildConfiguration)\*test*.dll;-:**\obj\**</code>,
  no Filters, no Settings file, no TestRun params, code coverage disabled, not running in parallel.</p>