diff --git a/studio/backend/core/training/diffusion_train_common.py b/studio/backend/core/training/diffusion_train_common.py
index 60741f8e8d..c4fe3c06be 100644
--- a/studio/backend/core/training/diffusion_train_common.py
+++ b/studio/backend/core/training/diffusion_train_common.py
@@ -493,7 +493,9 @@ def discover_image_caption_pairs(
         # 2. metadata row keyed by file name (basename or the relative path; as_posix so a
         #    Windows backslash path still matches the jsonl's forward-slash keys).
         if caption is None:
-            caption = meta_caption.get(img.name) or meta_caption.get(img.relative_to(root).as_posix())
+            caption = meta_caption.get(img.name) or meta_caption.get(
+                img.relative_to(root).as_posix()
+            )
         # 3. dreambooth instance prompt.
         if caption is None and instance_prompt:
             caption = instance_prompt