title: VS2017 Could not load file or assembly Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll or one of its dependencies
body: <p>When trying to open an older solution in <code>VS2017</code> there is an old Unit Test project that is giving me a problem when building.</p>
  
  <p><strong>I keep getting the following error when building this test project:</strong></p>
  
  <blockquote>
    <p>Could not load file or assembly 'file:///C:\Projects\MyProj\Test\DAL\UnitTestProj\Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll' or one of its dependencies. The system cannot find the file specified.</p>
  </blockquote>
  
  <p>I checked the project's references and it appears to be referencing <code>Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll</code>. Additionally there are no code errors. How could I ever figure out if it is one of its dependencies that it can't find?</p>