diff --git a/tensordict/_lazy.py b/tensordict/_lazy.py
index 570799f4d..c9a1dcae8 100644
--- a/tensordict/_lazy.py
+++ b/tensordict/_lazy.py
@@ -50,7 +50,6 @@
     _get_shape_from_args,
     _getitem_batch_size,
     _is_number,
-    _parse_to,
     _renamed_inplace_method,
     _shape,
     _td_fields,
@@ -1332,7 +1331,7 @@ def _to(
         result = self
 
         if device is not None and dtype is None and device == self.device:
-            return result
+            return result, False
 
         if non_blocking in (None, True):
             sub_non_blocking = True
@@ -3008,7 +3007,7 @@ def _to(
         result = self
 
         if device is not None and dtype is None and device == self.device:
-            return result
+            return result, False
 
         td, must_sync = self._source._to(
             device=device,
diff --git a/tensordict/_td.py b/tensordict/_td.py
index 17fc2d9ae..6fa08c981 100644
--- a/tensordict/_td.py
+++ b/tensordict/_td.py
@@ -61,7 +61,6 @@
     _LOCK_ERROR,
     _NON_STR_KEY_ERR,
     _NON_STR_KEY_TUPLE_ERR,
-    _parse_to,
     _prune_selected_keys,
     _set_item,
     _set_max_batch_size,
@@ -2513,7 +2512,7 @@ def _to(
         result = self
 
         if device is not None and dtype is None and device == self.device:
-            return result
+            return result, False
 
         must_sync = False
         # this may seem awkward but non_blocking=None acts as True and this makes only one check
diff --git a/tensordict/base.py b/tensordict/base.py
index 6c9772b69..9d3b10741 100644
--- a/tensordict/base.py
+++ b/tensordict/base.py
@@ -49,7 +49,6 @@
     _is_tensorclass,
     _KEY_ERROR,
     _parse_to,
-    _prefix_last_key,
     _proc_init,
     _prune_selected_keys,
     _set_max_batch_size,
diff --git a/tensordict/persistent.py b/tensordict/persistent.py
index b37f11771..070332254 100644
--- a/tensordict/persistent.py
+++ b/tensordict/persistent.py
@@ -970,7 +970,7 @@ def _to(
     ) -> Tuple[T, bool]:
         result = self
         if device is not None and dtype is None and device == self.device:
-            return result
+            return result, False
         if dtype is not None:
             return self.to_tensordict()._to(
                 device=device,
diff --git a/tensordict/utils.py b/tensordict/utils.py
index fb31aeb11..074454309 100644
--- a/tensordict/utils.py
+++ b/tensordict/utils.py
@@ -2284,7 +2284,6 @@ def _prefix_last_key(key, prefix):
     return key[:-1] + (_prefix_last_key(key[-1], prefix),)
 
 
-
 NESTED_TENSOR_ERR = (
     "The PyTorch version isn't compatible with "
     "nested tensors. Please upgrade to a more recent "