http://blogs.msdn.com/danielvl/archive/tags/mstest/default.aspxTags: mstesten-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/danielvl/archive/2009/03/28/run-mstest-exe-as-native-64-bit-process.aspxSun, 29 Mar 2009 03:38:47 GMT91d46819-8472-40ad-a661-2c78acb4018c:9516482Daniel Vasquez Lopez1http://blogs.msdn.com/danielvl/comments/9516482.aspxhttp://blogs.msdn.com/danielvl/commentrss.aspx?PostID=9516482<p>If you need to run MS Test command line utility as a 64-bit process you need to do 2 things:</p> <p><strong>Disclaimer</strong>: Be aware that this is not supported and it is under you own risk.</p> <p>1. Backup the MSTest.exe file first and then remove the 32-bit flag by running the <a href="http://msdn.microsoft.com/en-us/library/ms164699(VS.80).aspx">CorFlags.exe</a> utility as:</p> <p>&#160;&#160;&#160; CorFlags.exe MSTest.exe /32BIT- /Force</p> <p>2. Run your test with /noisolation switch to run tests within the MSTest.exe process and avoid using 32-bit only VSTestHost.exe</p> <p>&#160;&#160; MSTest.exe /testcontainer:&lt;your assembly&gt; /resultsfile:results.trx /noisolation</p> <p>And optionally, if MSTest.exe fails because the 32-bit flag was modified, you may want to skip the strong name verification:</p> <p>reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\StrongName\Verification\MSTest,b03f5f7f11d50a3a /f</p><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9516482" width="1" height="1">mstestx64unit test