--- a/qadevOOo/tests/java/mod/_toolkit/UnoScrollBarControl.java
+++ b/qadevOOo/tests/java/mod/_toolkit/UnoScrollBarControl.java
@@ -76,7 +76,9 @@ public class UnoScrollBarControl extends TestCase {
             XWindow xWin = xFrame.getContainerWindow();
             
             Toolkit tk = Toolkit.getDefaultToolkit();
-            Dimension dim = tk.getScreenSize();
+            // breaks on LO 3.4.0.1 in headless
+            // Dimension dim = tk.getScreenSize();
+            Dimension dim = new Dimension(800, 600);
             
             Rectangle newPosSize = xWin.getPosSize();
             newPosSize.Width = new Double(dim.getWidth()).intValue();