The following tests are slow:
- ServiceDiscoveryTest.AddRemoveService (2s)
- ServiceDiscoveryTest.DiscoverNewServices (2s)
- ServiceDiscoveryTest.ActivelyRefreshServices (2s)
- ServiceResolverTest.JustSrv(4s)
- ServiceResolverTest.WithNothing (4s)

This is the slowest (I think) test suite in unit_tests. Please consider speeding these up.