diff --git a/user/test/com/google/gwt/user/client/ui/PopupTest.java b/user/test/com/google/gwt/user/client/ui/PopupTest.java
index 44631cf..7428884 100644
--- a/user/test/com/google/gwt/user/client/ui/PopupTest.java
+++ b/user/test/com/google/gwt/user/client/ui/PopupTest.java
@@ -118,8 +118,8 @@
    */
   public void testCenterLargePopup() {
     PopupPanel popup = new PopupPanel();
-    popup.setHeight("1000px");
-    popup.setWidth("1000px");
+    popup.setHeight("4096px");
+    popup.setWidth("4096px");
     popup.setWidget(new Label("foo"));
     popup.center();
     assertEquals(0, popup.getAbsoluteTop());