diff --git a/pydfirram/core/base.py b/pydfirram/core/base.py
index e8b7448..f746e7c 100644
--- a/pydfirram/core/base.py
+++ b/pydfirram/core/base.py
@@ -331,7 +331,6 @@ def __init__(self, operating_system: OperatingSystem, dump_file: Path):
         self.validate_dump_file(dump_file)
         self.os = operating_system
         self.plugins: list[PluginEntry] = self.get_all_plugins()
-        print(self.plugins)
         self.dump_file = dump_file
         self.context: Optional[Context] = None
         self.temp_data = None
diff --git a/pydfirram/core/renderer.py b/pydfirram/core/renderer.py
index 8f67047..f7107c8 100644
--- a/pydfirram/core/renderer.py
+++ b/pydfirram/core/renderer.py
@@ -40,8 +40,7 @@
 # allow no PascalCase naming style and "lambda may not be necessary"
 # pylint: disable=W0108,C0103
 # (todo) : switch to PascalCase
-
-class TreeGrid_to_json(V3CLIRenderer):      # type: ignore
+class TreeGrid_to_json(V3CLIRenderer):  # type: ignore
     """ simple TreeGrid to JSON
     """
     _type_renderers: Any = {
@@ -72,8 +71,8 @@ def get_render_options(self) -> list[V3RenderOption]:
         """
         return []
 
-    # (fixme) : this methods should return nothing as defined in V3CLIRenderer
-    def render(self, grid: V3TreeGrid) -> list[V3TreeNode]:
+    # (fixme): This method should return nothing as defined in V3CLIRenderer
+    def render(self, grid: V3TreeGrid) -> dict[str, Any]:
         """
         Render the TreeGrid to JSON format.
 
@@ -84,15 +83,14 @@ def render(self, grid: V3TreeGrid) -> list[V3TreeNode]:
             Dict: The JSON representation of the TreeGrid.
         """
         final_output: tuple[
-            dict[str, list[V3TreeNode]],
-            list[V3TreeNode],
+            dict[str, dict[str, Any]],
+            list[dict[str, Any]],
         ] = ({}, [])
 
-
         def visitor(
             node: V3TreeNode,
-            accumulator: tuple[dict[str,Any], list[dict[str,Any]]],
-        ) -> tuple[dict[str,Any], list[dict[str,Any]]]:
+            accumulator: tuple[dict[str, Any], list[dict[str, Any]]],
+        ) -> tuple[dict[str, Any], list[dict[str, Any]]]:
             """
             A visitor function to process each node in the TreeGrid.
 
@@ -102,7 +100,7 @@ def visitor(
                     The accumulator containing the accumulated results.
 
             Returns:
-                Tuple[Dict[str,Any], List[Dict[str, Any]]]: The updated
+                Tuple[Dict[str, Any], List[Dict[str, Any]]]: The updated
                     accumulator.
             """
             acc_map = accumulator[0]
@@ -111,8 +109,8 @@ def visitor(
 
             for column_index, column in enumerate(grid.columns):
                 renderer = self._type_renderers.get(
-                    key     = column.type,
-                    default = self._type_renderers["default"],
+                    column.type,
+                    self._type_renderers["default"]
                 )
                 data = renderer(
                     list(node.values)[column_index],
@@ -132,11 +130,11 @@ def visitor(
             grid.populate(visitor, final_output)
         else:
             grid.visit(
-                node                = None,
-                function            = visitor,
-                initial_accumulator = final_output,
+                node=None,
+                function=visitor,
+                initial_accumulator=final_output,
             )
-        return final_output[1]
+        return {"data": final_output[1]}
 
 
 class Renderer():
@@ -159,7 +157,7 @@ def __init__(self, data: Any) -> None:
         """
         self.data = data
 
-    def to_list(self) -> dict[str,Any]:
+    def to_list(self):
         """
         Convert the data to a list format.
 
@@ -174,7 +172,8 @@ def to_list(self) -> dict[str,Any]:
         """
         try:
             # (fixme) : `render()` should return nothing
-            return TreeGrid_to_json().render(self.data)
+            parsed_data : dict[str, Any] = TreeGrid_to_json().render(self.data)
+            return parsed_data.get("data")
         except Exception as e:
             logger.error("Impossible to render data in dictionary form.")
             raise e
@@ -237,7 +236,7 @@ def to_df(self,max_row: bool = False) -> pd.DataFrame:
             if max_row:
                 pd.set_option('display.max_rows', None)
                 pd.set_option('display.max_columns', None)
-            return pd.DataFrame(data_as_dict)
+            return pd.DataFrame(data_as_dict.get("data"))
         except Exception as e:
             logger.error("Data cannot be rendered as a DataFrame.")
             raise e
diff --git a/tests/config.py b/tests/config.py
index 42546aa..f5357aa 100644
--- a/tests/config.py
+++ b/tests/config.py
@@ -1,3 +1,3 @@
 from pathlib import Path
 
-DUMP_FILE = Path("./data/dump.raw")
+DUMP_FILE = Path("/home/braguette/dataset_memory/ch2.dmp")
diff --git a/tests/test_volatility_windows_function.py b/tests/test_volatility_windows_function.py
index 277ba64..4ee34e8 100644
--- a/tests/test_volatility_windows_function.py
+++ b/tests/test_volatility_windows_function.py
@@ -32,7 +32,6 @@ def test_volatility_pslist(generic_instance: Generic) -> None:
     output: Renderer = generic_instance.pslist()
     assert isinstance(output, Renderer), "Output is not an instance of Renderer"
     pslist_content: List[Any] = output.to_list()
-    print(type(pslist_content))
     assert isinstance(pslist_content, list), "Output content is not a list"
     assert len(pslist_content) > 0, "Output list is empty"
     logger.success("TEST PASSED!")