Index: trunk/test/unit/org/openstreetmap/josm/tools/PlatformHookOsxTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/tools/PlatformHookOsxTest.java	(revision 12669)
+++ trunk/test/unit/org/openstreetmap/josm/tools/PlatformHookOsxTest.java	(revision 12670)
@@ -37,5 +37,5 @@
     @Test
     public void testStartupHook() {
-        hook.startupHook();
+        hook.startupHook((a,b,c,d) -> System.out.println("callback"));
     }
 
Index: trunk/test/unit/org/openstreetmap/josm/tools/PlatformHookWindowsTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/tools/PlatformHookWindowsTest.java	(revision 12669)
+++ trunk/test/unit/org/openstreetmap/josm/tools/PlatformHookWindowsTest.java	(revision 12670)
@@ -44,5 +44,5 @@
     @Test
     public void testStartupHook() {
-        hook.startupHook();
+        hook.startupHook((a,b,c,d) -> System.out.println("callback"));
     }