class MyViewTest : ApplicationTest() { private val originalModel = buildModel(model.item) // to create a copy override fun start(stage: Stage) { super.start(stage) val view = MyView() stage.scene = Scene(view.root) stage.show() } @Test fun test1() { // do some stuff model.item = originalModel } @Test fun test2() { // do some stuff model.item = originalModel } }