diff --git a/tests/test_matrix_fwt.py b/tests/test_matrix_fwt.py
index 9d63a718..cf9e8bce 100644
--- a/tests/test_matrix_fwt.py
+++ b/tests/test_matrix_fwt.py
@@ -140,7 +140,9 @@ def test_boundary_transform_1d(
     """Ensure matrix fwt reconstructions are pywt compatible."""
     data_torch = torch.from_numpy(data.astype(np.float64))
     wavelet = pywt.Wavelet(wavelet_str)
-    matrix_wavedec = MatrixWavedec(wavelet, level=level, boundary_orthogonalization=boundary)
+    matrix_wavedec = MatrixWavedec(
+        wavelet, level=level, boundary_orthogonalization=boundary
+    )
     coeffs = matrix_wavedec(data_torch)
     matrix_waverec = MatrixWaverec(wavelet, boundary_orthogonalization=boundary)
     rec = matrix_waverec(coeffs)
@@ -174,7 +176,9 @@ def test_matrix_transform_1d_rebuild(
     wavelet = pywt.Wavelet(wavelet_str)
     matrix_waverec = MatrixWaverec(wavelet, boundary_orthogonalization=boundary)
     for level in [2, 1]:
-        matrix_wavedec = MatrixWavedec(wavelet, level=level, boundary_orthogonalization=boundary)
+        matrix_wavedec = MatrixWavedec(
+            wavelet, level=level, boundary_orthogonalization=boundary
+        )
         for data in data_list:
             data_torch = torch.from_numpy(data.astype(np.float64))
             coeffs = matrix_wavedec(data_torch)