How to fork the jvm for each test in sbt

Question

I am working with some classes that (for some reason) can only be used once within a single VM. My test cases work if I run them individually (fork := true) enabled in my sbt settings.

If I run more than one of these tests, they fail with an exception that has to with a thread executor rejecting a task (it's most likely closed). It would be very time consuming to find out what causes the problem and even if I find the problem, I might not be able to resolve it (I do not have access to the source code).

I am currently using the specs2 test framework, but any test framework using sbt would be acceptable.

Is there any test framework for sbt that is capable of running each test in a jvm fork?

Thoughts or ideas on possible other solutions are of course welcome.

Answer 1

Using non-deprecated syntax:

testGrouping in Test := (definedTests in Test).value map { test =>
  Tests.Group(name = test.name, tests = Seq(test), runPolicy = Tests.SubProcess(
    ForkOptions(
      javaHome.value,
      outputStrategy.value,
      Nil,
      Some(baseDirectory.value),
      javaOptions.value,
      connectInput.value,
      envVars.value
    )))
}