diff --git a/art/estimators/certification/randomized_smoothing/randomized_smoothing.py b/art/estimators/certification/randomized_smoothing/randomized_smoothing.py
index 6ce339c6cf..75f3bbd8ff 100644
--- a/art/estimators/certification/randomized_smoothing/randomized_smoothing.py
+++ b/art/estimators/certification/randomized_smoothing/randomized_smoothing.py
@@ -100,7 +100,7 @@ def predict(self, x: np.ndarray, batch_size: int = 128, verbose: bool = False, *
             # get class counts
             counts_pred = self._prediction_counts(x_i, batch_size=batch_size)
             top = counts_pred.argsort()[::-1]
-            # conversion to int 
+            # conversion to int
             count1 = int(np.max(counts_pred))
             count2 = int(counts_pred[top[1]])