diff --git a/pangeo_forge_recipes/storage.py b/pangeo_forge_recipes/storage.py
index 07bbc9314..040bffaab 100644
--- a/pangeo_forge_recipes/storage.py
+++ b/pangeo_forge_recipes/storage.py
@@ -119,7 +119,9 @@ def get_fsspec_remote_protocol(self):
         elif isinstance(fsspec_protocol, list):
             return fsspec_protocol[0]
         else:
-            raise ValueError(f"could not resolve fsspec protocol '{fsspec_protocol}' from underlying filesystem")
+            raise ValueError(
+                f"could not resolve fsspec protocol '{fsspec_protocol}' from underlying filesystem"
+            )
 
     def get_mapper(self) -> fsspec.mapping.FSMap:
         """Get a mutable mapping object suitable for storing Zarr data."""