diff --git a/src/main/java/de/skymatic/javafxtest/App.java b/src/main/java/de/skymatic/javafxtest/App.java
index d2ed815..95d5639 100644
--- a/src/main/java/de/skymatic/javafxtest/App.java
+++ b/src/main/java/de/skymatic/javafxtest/App.java
@@ -1,50 +1,49 @@
 package de.skymatic.javafxtest;
 
 import javafx.application.Application;
-import javafx.geometry.Insets;
-import javafx.geometry.Pos;
-import javafx.scene.Scene;
-import javafx.scene.control.Button;
-import javafx.scene.control.Label;
-import javafx.scene.control.TextField;
-import javafx.scene.layout.HBox;
-import javafx.scene.layout.StackPane;
-import javafx.scene.layout.VBox;
-import javafx.scene.text.Text;
+import javafx.stage.FileChooser;
 import javafx.stage.Stage;
 
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.UUID;
+
 /**
- * JavaFX App
+ * Test App for JavaFX Bug
  */
 public class App extends Application {
 
+	private static final String PROBLEMATIC_CHAR = "\uD83C\uDF40"; //FOUR LEAF CLOVER
+	private static final String tmpDir = System.getProperty("java.io.tmpdir");
+
+	private static Path workingDir;
+	private static Path expectedFile;
+
 	@Override
 	public void start(Stage stage) {
-		var javaVersion = SystemInfo.javaVersion();
-		var javafxVersion = SystemInfo.javafxVersion();
-
-		var label = new Label("Hello, JavaFX " + javafxVersion + ", running on Java " + javaVersion + ".");
-		var textInputFiled = new TextField();
-		textInputFiled.setPromptText("Test text field: Enter anything you want.");
-		var button = new Button("Test Button");
-		var vbox = new VBox(label, textInputFiled, button);
-		vbox.setPadding(new Insets(20));
-		vbox.setAlignment(Pos.CENTER);
-		vbox.setSpacing(10);
-
-		var text = new Text("子貢問曰：有一言而可以終身行之者乎？子曰：其恕乎！己所不欲、勿施於人。"); //https://en.wikipedia.org/wiki/Confucius
-		var quoteBox = new HBox(text);
-		quoteBox.setAlignment(Pos.BOTTOM_RIGHT);
-		HBox.setMargin(text, new Insets(20));
-
-		var stackPane = new StackPane(quoteBox, vbox);
-		var scene = new Scene(stackPane, 640, 480);
-		stage.setScene(scene);
-		stage.setTitle("JavaFX Test App");
-		stage.show();
+		var fileChooser = new FileChooser();
+		fileChooser.setInitialDirectory(workingDir.toFile());
+		var chosenFile = fileChooser.showOpenDialog(stage);
+		if (chosenFile != null) {
+			if (!chosenFile.toPath().equals(expectedFile)) {
+				throw new IllegalStateException("Chosen path is not correct: " + chosenFile.getPath());
+			}
+		}
+		stage.close();
+		System.exit(0);
+	}
+
+	private static void prepare() throws IOException {
+		var dir = Files.createDirectories(Path.of(tmpDir).resolve(UUID.randomUUID()+"/" + PROBLEMATIC_CHAR));
+		workingDir = dir.getParent();
+		expectedFile = Files.createFile(dir.resolve("foo"));
 	}
 
-	public static void main(String[] args) {
+	public static void main(String[] args) throws IOException {
+		assert tmpDir != null;
+		prepare();
+		assert workingDir != null;
 		launch();
 	}