diff --git a/modules/plugin/test/testplugin/nptest_os2.cpp b/modules/plugin/test/testplugin/nptest_os2.cpp
index b8280d9a06e9..83333b124958 100644
--- a/modules/plugin/test/testplugin/nptest_os2.cpp
+++ b/modules/plugin/test/testplugin/nptest_os2.cpp
@@ -56,6 +56,12 @@ pluginInstanceShutdown(InstanceData* instanceData)
 {
 }
 
+void
+pluginDoSetWindow(InstanceData* instanceData, NPWindow* newWindow)
+{
+  instanceData->window = *newWindow;
+}
+
 void
 pluginWidgetInit(InstanceData* instanceData, void* oldWindow)
 {
@@ -66,3 +72,22 @@ pluginHandleEvent(InstanceData* instanceData, void* event)
 {
   return 0;
 }
+
+int32_t pluginGetEdge(InstanceData* instanceData, RectEdge edge)
+{
+  // XXX nothing here yet since we don't support windowed plugins
+  return NPTEST_INT32_ERROR;
+}
+
+int32_t pluginGetClipRegionRectCount(InstanceData* instanceData)
+{
+  // XXX nothing here yet since we don't support windowed plugins
+  return NPTEST_INT32_ERROR;
+}
+
+int32_t pluginGetClipRegionRectEdge(InstanceData* instanceData, 
+    int32_t rectIndex, RectEdge edge)
+{
+  // XXX nothing here yet since we don't support windowed plugins
+  return NPTEST_INT32_ERROR;
+}
diff --git a/modules/plugin/test/testplugin/nptest_qt.cpp b/modules/plugin/test/testplugin/nptest_qt.cpp
index b8280d9a06e9..83333b124958 100644
--- a/modules/plugin/test/testplugin/nptest_qt.cpp
+++ b/modules/plugin/test/testplugin/nptest_qt.cpp
@@ -56,6 +56,12 @@ pluginInstanceShutdown(InstanceData* instanceData)
 {
 }
 
+void
+pluginDoSetWindow(InstanceData* instanceData, NPWindow* newWindow)
+{
+  instanceData->window = *newWindow;
+}
+
 void
 pluginWidgetInit(InstanceData* instanceData, void* oldWindow)
 {
@@ -66,3 +72,22 @@ pluginHandleEvent(InstanceData* instanceData, void* event)
 {
   return 0;
 }
+
+int32_t pluginGetEdge(InstanceData* instanceData, RectEdge edge)
+{
+  // XXX nothing here yet since we don't support windowed plugins
+  return NPTEST_INT32_ERROR;
+}
+
+int32_t pluginGetClipRegionRectCount(InstanceData* instanceData)
+{
+  // XXX nothing here yet since we don't support windowed plugins
+  return NPTEST_INT32_ERROR;
+}
+
+int32_t pluginGetClipRegionRectEdge(InstanceData* instanceData, 
+    int32_t rectIndex, RectEdge edge)
+{
+  // XXX nothing here yet since we don't support windowed plugins
+  return NPTEST_INT32_ERROR;
+}