diff --git a/packages/jupyter-ai/jupyter_ai/document_loaders/directory.py b/packages/jupyter-ai/jupyter_ai/document_loaders/directory.py
index 5c3297e90..b87a7245f 100644
--- a/packages/jupyter-ai/jupyter_ai/document_loaders/directory.py
+++ b/packages/jupyter-ai/jupyter_ai/document_loaders/directory.py
@@ -61,7 +61,9 @@ def split(path, all_files: bool, splitter):
             # Filter out hidden filenames, hidden directories, and excluded directories,
             # unless "all files" are requested
             if not all_files:
-                subdirs[:] = [d for d in subdirs if not (d[0] == "." or d in EXCLUDE_DIRS)]
+                subdirs[:] = [
+                    d for d in subdirs if not (d[0] == "." or d in EXCLUDE_DIRS)
+                ]
                 filenames = [f for f in filenames if not f[0] == "."]
 
     for filename in filenames: