diff --git a/changelog.d/19763.misc b/changelog.d/19763.misc
new file mode 100644
index 0000000000..c9e8277e01
--- /dev/null
+++ b/changelog.d/19763.misc
@@ -0,0 +1 @@
+Lint and format `rust/src/canonical_json.rs`.
diff --git a/rust/src/canonical_json.rs b/rust/src/canonical_json.rs
index ff1fcd3ee4..4abd001847 100644
--- a/rust/src/canonical_json.rs
+++ b/rust/src/canonical_json.rs
@@ -824,7 +824,7 @@ mod tests {
 
         // Serialize the keys in the reverse order.
         for (c, _) in ascii_order.iter().rev() {
-            map_serializer.serialize_entry(c.into(), &1).unwrap();
+            map_serializer.serialize_entry(c, &1).unwrap();
         }
         SerializeMap::end(map_serializer).unwrap();