diff --git a/core/src/merkle_tree.rs b/core/src/merkle_tree.rs
index 750337ba..93470db8 100644
--- a/core/src/merkle_tree.rs
+++ b/core/src/merkle_tree.rs
@@ -208,7 +208,12 @@ mod test {
     #[test]
     /// Check the root of the tree with a single item, with the manual calculation.
     fn root_of_single_item_tree() {
-        // TODO
+        let key: Hash256 = Hash256::hash("hello world");
+        let merkle_tree: OneshotMerkleTree = OneshotMerkleTree::create(Vec::from([key]));
+        let root_hash: Hash256 = OneshotMerkleTree::root(&merkle_tree);
+
+        assert!(root_hash == key);
+        assert!(merkle_tree.hash_list.len() == 1);
     }
 
     #[test]