diff --git a/src/aggregation/metric/cardinality.rs b/src/aggregation/metric/cardinality.rs
index 80106654c..efc634f7c 100644
--- a/src/aggregation/metric/cardinality.rs
+++ b/src/aggregation/metric/cardinality.rs
@@ -341,8 +341,7 @@ impl Serialize for CardinalityCollector {
 impl<'de> Deserialize<'de> for CardinalityCollector {
     fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
         let bytes: Vec<u8> = Deserialize::deserialize(deserializer)?;
-        let sketch =
-            HllSketch::deserialize(&bytes).map_err(serde::de::Error::custom)?;
+        let sketch = HllSketch::deserialize(&bytes).map_err(serde::de::Error::custom)?;
         Ok(Self { sketch, salt: 0 })
     }
 }
@@ -577,9 +576,10 @@ mod tests {
 
     #[test]
     fn cardinality_collector_serialize_deserialize_binary() {
-        use super::CardinalityCollector;
         use datasketches::hll::HllSketch;
 
+        use super::CardinalityCollector;
+
         let mut collector = CardinalityCollector::default();
         collector.insert("apple");
         collector.insert("banana");