diff --git a/bindings/python/testsuite/test_timeline.py b/bindings/python/testsuite/test_timeline.py
index f1f0f38d64..8b467c4eff 100644
--- a/bindings/python/testsuite/test_timeline.py
+++ b/bindings/python/testsuite/test_timeline.py
@@ -16,12 +16,14 @@ class Timeline(TestCase):
         self.mainloop = glib.MainLoop()
 
         #Let's add the layer to the timeline, and the source to the layer.
-        tl.add_layer(lyr)
         src.set_duration(long(gst.SECOND * 10))
         src.set_vpattern("Random (television snow)")
-        lyr.add_object(src, -1)
 
-        pip.add_timeline(tl)
+        assert (tl.add_layer(lyr) == True)
+        assert (lyr.add_object(src, -1) == True)
+        self.failIf(len(src.get_track_objects()) != 2)
+        assert (pip.add_timeline(tl) == True)
+
         bus.set_sync_handler(self.bus_handler)
 
         self.pipeline = pip
diff --git a/bindings/python/testsuite/test_transition.py b/bindings/python/testsuite/test_transition.py
index e86947b0ea..a19ea8de5f 100644
--- a/bindings/python/testsuite/test_transition.py
+++ b/bindings/python/testsuite/test_transition.py
@@ -28,7 +28,7 @@ class Timeline(TestCase):
 
         lyr.add_object(src, -1)
         lyr.add_object(tr, -1)
-        lyr.add_object(src2, -1)
+        assert (lyr.add_object(src2, -1) == True)
 
         pip.add_timeline(tl)
         bus.set_sync_handler(self.bus_handler)