diff --git a/test/dataset/test_utils.py b/test/dataset/test_utils.py
index 0bf8ecb4..e269dde7 100644
--- a/test/dataset/test_utils.py
+++ b/test/dataset/test_utils.py
@@ -275,19 +275,15 @@ def test_map_detections_class_id(
             DoesNotRaise(),
         ),  # mask where foreground consists of 3 separate components
         (
-            np.array(
-                [[[]]]
-            ).astype(bool),
+            np.array([[[]]]).astype(bool),
             None,
             pytest.raises(AssertionError),
-        ),  # raises AssertionError because mask dimentionality is not 2D 
+        ),  # raises AssertionError because mask dimentionality is not 2D
         (
-            np.array(
-                [[]]
-            ).astype(bool),
+            np.array([[]]).astype(bool),
             None,
             pytest.raises(AssertionError),
-        ),  # raises AssertionError because mask is empty 
+        ),  # raises AssertionError because mask is empty
     ],
 )
 def test_mask_to_rle_conversion(
@@ -346,8 +342,8 @@ def test_mask_to_rle_conversion(
             [2, 2],
             None,
             pytest.raises(AssertionError),
-        ),  # raises AssertionError because number of pixels in RLE does not match 
-            # number of pixels in expected mask (width x height).
+        ),  # raises AssertionError because number of pixels in RLE does not match
+        # number of pixels in expected mask (width x height).
     ],
 )
 def test_rle_to_mask_convertion(