diff --git a/serde_derive/src/dummy.rs b/serde_derive/src/dummy.rs
index 43026376..8fd5494b 100644
--- a/serde_derive/src/dummy.rs
+++ b/serde_derive/src/dummy.rs
@@ -14,7 +14,12 @@ pub fn wrap_in_const(serde_path: Option<&syn::Path>, code: TokenStream) -> Token
 
     quote! {
         #[doc(hidden)]
-        #[allow(non_upper_case_globals, unused_attributes, unused_qualifications, clippy::absolute_paths)]
+        #[allow(
+            non_upper_case_globals,
+            unused_attributes,
+            unused_qualifications,
+            clippy::absolute_paths,
+        )]
         const _: () = {
             #use_serde
             #code