diff --git a/storage/src/nullifier_sparse_merkle_tree.rs b/storage/src/nullifier_sparse_merkle_tree.rs
index dd8ec951..dbb7a3db 100644
--- a/storage/src/nullifier_sparse_merkle_tree.rs
+++ b/storage/src/nullifier_sparse_merkle_tree.rs
@@ -132,4 +132,10 @@ mod tests {
     fn create_nullifier(hash: TreeHashType) -> UTXONullifier {
         UTXONullifier { utxo_hash: hash }
     }
+
+    #[test]
+    fn test_new_tree_initialization() {
+        let tree = NullifierSparseMerkleTree::new();
+        assert!(tree.curr_root.is_none());
+    }
 }