diff --git a/bookwyrm/importers/calibre_import.py b/bookwyrm/importers/calibre_import.py
index b9eb3da7d..7395e2f7b 100644
--- a/bookwyrm/importers/calibre_import.py
+++ b/bookwyrm/importers/calibre_import.py
@@ -15,8 +15,8 @@ class CalibreImporter(Importer):
         row_mappings_guesses = []
 
         for field, mapping in self.row_mappings_guesses:
-            if field in ('date_added',):
-                row_mappings_guesses.append((field, mapping + ['timestamp']))
+            if field in ("date_added",):
+                row_mappings_guesses.append((field, mapping + ["timestamp"]))
             else:
                 row_mappings_guesses.append((field, mapping))
 
diff --git a/bookwyrm/models/import_job.py b/bookwyrm/models/import_job.py
index 7ebac0e19..556f133f9 100644
--- a/bookwyrm/models/import_job.py
+++ b/bookwyrm/models/import_job.py
@@ -175,7 +175,10 @@ class ImportItem(models.Model):
     def date_added(self):
         """when the book was added to this dataset"""
         if self.normalized_data.get("date_added"):
-            parsed_date_added = dateutil.parser.parse(self.normalized_data.get("date_added"))
+            parsed_date_added = dateutil.parser.parse(
+                self.normalized_data.get("date_added")
+            )
+
             if timezone.is_aware(parsed_date_added):
                 # Keep timezone if import already had one
                 return parsed_date_added