diff --git a/cubids/cubids.py b/cubids/cubids.py
index f056f8fd2..44c57fdce 100644
--- a/cubids/cubids.py
+++ b/cubids/cubids.py
@@ -347,7 +347,9 @@ def apply_tsv_changes(self, summary_tsv, files_tsv, new_prefix, raise_on_error=T
         merge_commands = []
         for source_id, dest_id in ok_merges:
             dest_files = files_df.loc[(files_df[["ParamGroup", "EntitySet"]] == dest_id).all(1)]
-            source_files = files_df.loc[(files_df[["ParamGroup", "EntitySet"]] == source_id).all(1)]
+            source_files = files_df.loc[
+                (files_df[["ParamGroup", "EntitySet"]] == source_id).all(1)
+            ]
 
             # Get a source json file
             img_full_path = self.path + source_files.iloc[0].FilePath
diff --git a/cubids/metadata_merge.py b/cubids/metadata_merge.py
index 2087d009c..6562f35b7 100644
--- a/cubids/metadata_merge.py
+++ b/cubids/metadata_merge.py
@@ -302,7 +302,9 @@ def group_by_acquisition_sets(files_tsv, output_prefix, acq_group_level):
             acq_groups[acq_id].append((row.EntitySet, row.ParamGroup))
         else:
             acq_id = (file_entities.get("subject"), None)
-            acq_groups[acq_id].append((row.EntitySet, row.ParamGroup, file_entities.get("session")))
+            acq_groups[acq_id].append(
+                (row.EntitySet, row.ParamGroup, file_entities.get("session"))
+            )
 
     # Map the contents to a list of subjects/sessions
     contents_to_subjects = defaultdict(list)