here's a minimal example based on code from the docs:

data class ExampleState(val value: String = "")
    class ExampleContainerHost(scope: CoroutineScope):
        ContainerHost<ExampleState, Unit> {

        // create a container
        override val container = scope.container<ExampleState, Unit>(ExampleState())

        fun doSomethingUseful() = intent {
            reduce { ExampleState("foo") }
        }
    }

    @Test
    fun exampleTest() = runTest {
        ExampleContainerHost(this).test(this) {
            expectInitialState()
            containerHost.doSomethingUseful()

            expectState { copy("foo") }
        }
    }

If I change

ExampleContainerHost(this).test(this) {

to

ExampleContainerHost(GlobalScope).test(this) {

Then the test passes as expected. So I guess my question is what CoroutineScope is the container meant to be created with in a test? The new test docs just use ViewModels to create the ContainerHost.