[Locke1689]

Most of the .NET repos are structured to use inner and outer loop testing with Jenkins. Most tests on most architectures are run in the inner loop, which are kicked off in parallel as soon as you make a pull request to one of the .NET repositories on Github.

Some repositories, like CoreCLR, have outer loop testing that runs on a separate schedule (nightly, I think), but those tests are far less likely to break and are more devoted to finding rare and difficult to compute edge cases.