diff --git a/src/cleaning.py b/src/cleaning.py
index 4bf78bb..fed3b16 100755
--- a/src/cleaning.py
+++ b/src/cleaning.py
@@ -14,11 +14,11 @@ def path_filename(filename: str) -> str:
 class Cleaning:
     def __init__(self, filename) -> None:
         self._vins: DataFrame = read_csv(filename)
-        #
+        # créer la liste de tout les scores
         self.SCORE_COLS: list[str] = [
             c for c in self._vins.columns if c not in ["Appellation", "Prix"]
         ]
-        #
+        # transforme tout les colonnes score en numérique
         for col in self.SCORE_COLS:
             self._vins[col] = to_numeric(self._vins[col], errors="coerce")
 
@@ -87,7 +87,7 @@ class Cleaning:
         Remplace la colonne 'Appellation' par des colonnes indicatrices
         """
         appellations = self._vins[column].astype(str).str.strip()
-        appellation_dummies = get_dummies(appellations)
+        appellation_dummies = get_dummies(appellations, prefix="App")
         self._vins = self._vins.drop(columns=[column])
         self._vins = self._vins.join(appellation_dummies)
         return self
diff --git a/tests/test_cleaning.py b/tests/test_cleaning.py
index 28f42c6..00f8d0f 100755
--- a/tests/test_cleaning.py
+++ b/tests/test_cleaning.py
@@ -62,6 +62,6 @@ def test_encode_appellation(cleaning_raw: Cleaning):
         .encode_appellation()
         .getVins()
     )
-    assert "Appellation" not in out.columns
-    assert "Pauillac" in out.columns
-    assert int(out.loc[0, "Pauillac"]) == 1
+    assert "App_Appellation" not in out.columns
+    assert "App_Pauillac" in out.columns
+    assert int(out.loc[0, "App_Pauillac"]) == 1