^{Originally posted by thomasstormark3shape May 2, 2025}
Both Xunit and Nunit has the option to opt-in for parallel test execution on a class-level or method level.

With MSTest its only possible to set [assembly: Parallelize(…)], and then opting out for each class or method by [DoNotParallelize].

When you have an old large test project with houndreds of test classes, and you find out that a lot does NOT parallelize - it would be good to gradually opt-in during migration period, and finally go for assembly level default parallelize.

Any thoughts on this feature?