Run tests in 64-bit

Question

I got a ADO.NET driver which is compiled as 64-bit. I therefore need to run mstests in 64-bit mode. Is that possible?

(the dev machine is 64bit).

Answer 1

Try the solution described in this blog post:

1. Backup mstest.exe and run CorFlags.exe MSTest.exe /32BIT- /Force to remove the 32-bit flag
2. Run your tests with /noisolation: MSTest.exe /testcontainer:<your-assembly> /resultsfile:<your-results-file> /noisolation
3. If MSTest.exe fails after modification, run reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\StrongName\Verification\MSTest,b03f5f7f11d50a3a /f to skip strong name verification

Answer 2

Visual Studio has a built in option for this. It was a bit hard to find (if you do not know where to look).

Doubleclick on the local.testsettings file in Solution Explorer and select Hosts in the listbox. Then change as the image shows.

You must do your tests in a 64-bit OS and your application should be compiled with AnyCPU.

Answer 3

It is easier in Visual studio 2013. Select Test->Test Settings->Default Processor Architecture->x64 before running the tests