Run api project as a background process C#

I'm setting up a test in a project that i'm working with. The test is supposed to consume two of the web-api's and one Azure function that is in the same solution as the test-project. Instead of having to start all these processes before being able to run the test, is there a way to have these 3 projects running in the background when running the test on your local machine?

I've been looking around and found "HostingEnvironment" to be interesting but I dont think that covers my need. If anyone could point me in the right direction I'd appreciate it.