diff --git a/src/tests/servers/app/newerClipping/DrawingEngine.cpp b/src/tests/servers/app/newerClipping/DrawingEngine.cpp
index de9b683f73..c4e095d586 100644
--- a/src/tests/servers/app/newerClipping/DrawingEngine.cpp
+++ b/src/tests/servers/app/newerClipping/DrawingEngine.cpp
@@ -37,7 +37,10 @@ DrawingEngine::Unlock()
 #if RUN_WITH_FRAME_BUFFER
 	Sync();
 #else
-//	Flush();
+// Flush() takes some time, but we
+// need to do that, since we draw
+// at any time, outside actual updates
+	Flush();
 #endif
 	Window()->Unlock();
 }
diff --git a/src/tests/servers/app/newerClipping/WindowLayer.cpp b/src/tests/servers/app/newerClipping/WindowLayer.cpp
index f56dc8d793..04207d4d68 100644
--- a/src/tests/servers/app/newerClipping/WindowLayer.cpp
+++ b/src/tests/servers/app/newerClipping/WindowLayer.cpp
@@ -778,6 +778,7 @@ UpdateSession&
 UpdateSession::operator=(const UpdateSession& other)
 {
 	fDirtyRegion = other.fDirtyRegion;
+	fInUse = other.fInUse;
 }