What prevents MSTest from running in parallel?

What can prevent MSTest from running in parallel? I 开发者_StackOverflowset the parallelTestCount to 0, but it is still running one test at a time.

One possibility you may not have tried yet... This article mentions that you need to restart your environment before the changes will take effect. Also, have you made any changes to your testsettings before setting parallelTestCount to 0? If so you'd have to make the changes again. Hope this helps!

You must not have any data collectors configured and you cant run any Coded UI tests.

This article contains all the details I think.

Not having multiple cores. See this post.