diff --git a/tensordict/nn/distributions/composite.py b/tensordict/nn/distributions/composite.py
index 4285624f3..79a890545 100644
--- a/tensordict/nn/distributions/composite.py
+++ b/tensordict/nn/distributions/composite.py
@@ -414,7 +414,8 @@ def log_prob_composite(
                 "The current default is ``True`` but from v0.9 it will be changed to ``False``. Please adapt your call to `log_prob_composite` accordingly.",
                 category=DeprecationWarning,
             )
-        slp = 0.0
+        if include_sum:
+            slp = 0.0
         d = {}
         for name, dist in self.dists.items():
             d[_add_suffix(name, "_log_prob")] = lp = dist.log_prob(sample.get(name))
diff --git a/test/test_nn.py b/test/test_nn.py
index 13231e927..cdbab76e9 100644
--- a/test/test_nn.py
+++ b/test/test_nn.py
@@ -12,6 +12,7 @@
 
 import pytest
 import torch
+
 from tensordict import NonTensorData, NonTensorStack, tensorclass, TensorDict
 from tensordict._C import unravel_key_list
 from tensordict.nn import (
@@ -2277,7 +2278,9 @@ def test_log_prob(self):
         assert isinstance(lp, torch.Tensor)
         assert lp.requires_grad
 
-    def test_log_prob_composite(self):
+    @pytest.mark.parametrize("inplace", [None, True, False])
+    @pytest.mark.parametrize("include_sum", [None, True, False])
+    def test_log_prob_composite(self, inplace, include_sum):
         params = TensorDict(
             {
                 "cont": {
@@ -2296,12 +2299,25 @@ def test_log_prob_composite(self):
             },
             extra_kwargs={("nested", "disc"): {"temperature": torch.tensor(1.0)}},
             aggregate_probabilities=False,
+            inplace=inplace,
+            include_sum=include_sum,
         )
+        if include_sum is None:
+            include_sum = True
+        if inplace is None:
+            inplace = True
         sample = dist.rsample((4,))
-        sample = dist.log_prob_composite(sample, include_sum=True)
-        assert sample.get("cont_log_prob").requires_grad
-        assert sample.get(("nested", "disc_log_prob")).requires_grad
-        assert "sample_log_prob" in sample.keys()
+        sample_lp = dist.log_prob_composite(sample)
+        assert sample_lp.get("cont_log_prob").requires_grad
+        assert sample_lp.get(("nested", "disc_log_prob")).requires_grad
+        if inplace:
+            assert sample_lp is sample
+        else:
+            assert sample_lp is not sample
+        if include_sum:
+            assert "sample_log_prob" in sample_lp.keys()
+        else:
+            assert "sample_log_prob" not in sample_lp.keys()
 
     def test_entropy(self):
         params = TensorDict(
@@ -2327,7 +2343,8 @@ def test_entropy(self):
         assert isinstance(ent, torch.Tensor)
         assert ent.requires_grad
 
-    def test_entropy_composite(self):
+    @pytest.mark.parametrize("include_sum", [None, True, False])
+    def test_entropy_composite(self, include_sum):
         params = TensorDict(
             {
                 "cont": {
@@ -2345,12 +2362,18 @@ def test_entropy_composite(self):
                 ("nested", "disc"): distributions.Categorical,
             },
             aggregate_probabilities=False,
+            include_sum=include_sum,
         )
+        if include_sum is None:
+            include_sum = True
         sample = dist.entropy()
         assert sample.shape == params.shape == dist._batch_shape
         assert sample.get("cont_entropy").requires_grad
         assert sample.get(("nested", "disc_entropy")).requires_grad
-        assert "entropy" in sample.keys()
+        if include_sum:
+            assert "entropy" in sample.keys()
+        else:
+            assert "entropy" not in sample.keys()
 
     def test_cdf(self):
         params = TensorDict(