diff --git a/tests/test_sce_slice.py b/tests/test_sce_slice.py
index cbd38d5..bdffcc7 100644
--- a/tests/test_sce_slice.py
+++ b/tests/test_sce_slice.py
@@ -51,8 +51,10 @@
 
 def test_SCE_slice():
     tse = SingleCellExperiment(
-        assays={"counts": counts}, row_data=row_data, column_data=col_data,
-        reduced_dims={"random_embeds": np.random.rand(ncols, 5)}
+        assays={"counts": counts},
+        row_data=row_data,
+        column_data=col_data,
+        reduced_dims={"random_embeds": np.random.rand(ncols, 5)},
     )
 
     tse_slice = tse[0:10, 0:3]