diff --git a/zebrad/src/components/mempool/storage/tests.rs b/zebrad/src/components/mempool/storage/tests.rs
index 5bd5b3cd..cd297f78 100644
--- a/zebrad/src/components/mempool/storage/tests.rs
+++ b/zebrad/src/components/mempool/storage/tests.rs
@@ -25,7 +25,7 @@ fn mempool_storage_crud_mainnet() {
     let _ = storage.insert(unmined_tx.clone());
 
     // Check that it is in the mempool, and not rejected.
-    assert!(storage.clone().contains(&unmined_tx.id));
+    assert!(storage.contains(&unmined_tx.id));
 
     // Remove tx
     let _ = storage.remove(&unmined_tx.id);