diff --git a/libs/community/langchain_community/document_loaders/s3_directory.py b/libs/community/langchain_community/document_loaders/s3_directory.py
index 545d2059b43ae..24d4afab62365 100644
--- a/libs/community/langchain_community/document_loaders/s3_directory.py
+++ b/libs/community/langchain_community/document_loaders/s3_directory.py
@@ -121,7 +121,7 @@ def load(self) -> List[Document]:
         docs = []
         for obj in bucket.objects.filter(Prefix=self.prefix):
             # Skip directories
-            if obj.size == 0 and obj.key.endswith('/'):
+            if obj.size == 0 and obj.key.endswith("/"):
                 continue
             loader = S3FileLoader(
                 self.bucket,