diff --git a/test/test_tensorclass.py b/test/test_tensorclass.py
index b33a4a187..df6d41f68 100644
--- a/test/test_tensorclass.py
+++ b/test/test_tensorclass.py
@@ -1006,7 +1006,10 @@ def test_pickle(
             with open(tempdir / "test.pkl", "rb") as f:
                 data2 = pickle.load(f)
 
-        assert_allclose_td(data.to_tensordict(), data2.to_tensordict())
+        assert_allclose_td(
+            data.to_tensordict(retain_none=False),
+            data2.to_tensordict(retain_none=False),
+        )
         assert isinstance(data2, MyData)
         assert data2.z == data.z
 
@@ -1524,14 +1527,14 @@ def get_data(cls, shift):
         assert (data0.y.X == 1).all()
         assert data0.y.z == "test_tensorclass1"
         data0 = MyDataNested.get_data(0)
-        data0.update(data1.to_dict())
+        data0.update(data1.to_dict(retain_none=False))
         assert (data0.X == 1).all()
         assert data0.z == "test_tensorclass1", data0.z
         assert (data0.y.X == 1).all()
         assert data0.y.z == "test_tensorclass1"
 
         data0 = MyDataNested.get_data(0)
-        data0.update(data1.to_tensordict())
+        data0.update(data1.to_tensordict(retain_none=False))
         assert (data0.X == 1).all()
         assert data0.z == "test_tensorclass1"
         assert (data0.y.X == 1).all()
@@ -1745,7 +1748,7 @@ class MyClass:
             batch_size=[3, 4],
         )
 
-        ctd = c.to_tensordict()
+        ctd = c.to_tensordict(retain_none=False)
         assert isinstance(ctd, TensorDictBase)
         assert "x" in ctd.keys()
         assert "z" in ctd.keys()