diff --git a/src/hugr/validate.rs b/src/hugr/validate.rs
index 89b31b1ee2..cea7425bdb 100644
--- a/src/hugr/validate.rs
+++ b/src/hugr/validate.rs
@@ -1418,7 +1418,9 @@ mod test {
             TypeBound::Any,
         ));
         assert_eq!(
-            identity_hugr_with_type(valid.clone()).0.update_validate(&reg),
+            identity_hugr_with_type(valid.clone())
+                .0
+                .update_validate(&reg),
             Ok(())
         );