I've not looked into it yet, but maybe something like

class Configuration : AbstractConfiguration {
   init {

      install(MyTestListener)
      install(MyTestExtension)
      
      beforeProject {
         
      }
      
      after Project {
         
      }

      parallelize(1)
      writeSpecFailureFile("kolintest.failures")

      includeTags(Hive, Windows)
      excludeTags(Linux)
   }
}

Not sure if it's a big deal or not.