@@ -86,6 +86,8 @@ def test_serialization_for(learner_type, learner_kwargs, serializer):

     simple(learner, goal_1)

     learner_bytes = serializer.dumps(learner)

+    loss = learner.loss()

+    asked = learner.ask(1)

     if serializer is not pickle:

         # With pickle the functions are only pickled by reference

@@ -94,6 +96,15 @@ def test_serialization_for(learner_type, learner_kwargs, serializer):

     learner_loaded = serializer.loads(learner_bytes)

     assert learner_loaded.npoints >= 10

+    assert loss == learner_loaded.loss()

+

+    if learner_type is not Learner2D:

+        # cannot test this for Learner2D because

+        # xfailing test_point_adding_order_is_irrelevant

+        assert asked == learner_loaded.ask(1)

+        # load again to undo the ask

+        learner_loaded = serializer.loads(learner_bytes)

+

     simple(learner_loaded, goal_2)

     assert learner_loaded.npoints >= 20