Index: trunk/test/unit/org/openstreetmap/josm/gui/dialogs/validator/ValidatorTreePanelTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/gui/dialogs/validator/ValidatorTreePanelTest.java	(revision 11131)
+++ trunk/test/unit/org/openstreetmap/josm/gui/dialogs/validator/ValidatorTreePanelTest.java	(revision 11132)
@@ -9,4 +9,5 @@
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.Enumeration;
 import java.util.HashSet;
 import java.util.Set;
@@ -47,9 +48,21 @@
                         .build(),
                 TestError.builder(null, Severity.WARNING, 0)
-                        .message("warn")
+                        .message("warn", "foo")
+                        .primitives(new Node(2))
+                        .build(),
+                TestError.builder(null, Severity.WARNING, 0)
+                        .message("warn", "bar")
                         .primitives(new Node(2))
                         .build())));
         assertNotNull(vtp);
-        assertEquals(2, vtp.getErrors().size());
+        final Enumeration nodes = vtp.getRoot().breadthFirstEnumeration();
+        assertEquals("", nodes.nextElement().toString());
+        assertEquals("Errors (1)", nodes.nextElement().toString());
+        assertEquals("Warnings (2)", nodes.nextElement().toString());
+        assertEquals("err (1)", nodes.nextElement().toString());
+        assertEquals("warn (2)", nodes.nextElement().toString());
+        nodes.nextElement();
+        assertEquals("bar (1)", nodes.nextElement().toString());
+        assertEquals("foo (1)", nodes.nextElement().toString());
         vtp.setVisible(true);
         vtp.setVisible(false);