diff --git a/aiken.lock b/aiken.lock
index e65d27d..f1c0065 100644
--- a/aiken.lock
+++ b/aiken.lock
@@ -24,5 +24,5 @@ requirements = []
 source = "github"
 
 [etags]
-"aiken-lang/fuzz@main" = [{ secs_since_epoch = 1716743235, nanos_since_epoch = 519470000 }, "d7aadd4a9b25589bd6d5e3bbedcd809cdf97fe3eddb365cf89cd6ac6bc829643"]
-"aiken-lang/stdlib@main" = [{ secs_since_epoch = 1716743235, nanos_since_epoch = 326281000 }, "dfda6bc70aad760f7f836c0db06b07e0a398bb3667f4d944d7d7255d54a454af"]
+"aiken-lang/fuzz@main" = [{ secs_since_epoch = 1716746859, nanos_since_epoch = 611086000 }, "98cf81aa68f9ccf68bc5aba9be06d06cb1db6e8eff60b668ed5e8ddf3588206b"]
+"aiken-lang/stdlib@main" = [{ secs_since_epoch = 1716746859, nanos_since_epoch = 401081000 }, "dfda6bc70aad760f7f836c0db06b07e0a398bb3667f4d944d7d7255d54a454af"]
diff --git a/lib/aiken/sparse_merkle_tree_blake256_test.ak b/lib/aiken/sparse_merkle_tree_blake256_test.ak
index 9f34d0a..9b80db3 100644
--- a/lib/aiken/sparse_merkle_tree_blake256_test.ak
+++ b/lib/aiken/sparse_merkle_tree_blake256_test.ak
@@ -1,3 +1,4 @@
+use aiken/builtin
 use aiken/bytearray
 use aiken/hash
 use aiken/sparse_merkle_tree/consts.{merkle_lower_bound, merkle_upper_bound}
@@ -911,3 +912,70 @@ test sparse_merkle_proof_2() {
 
   expected_root == actual_root
 }
+
+test sparse_merkle_proof_3() {
+  let old_root =
+    #"49148fa603b03d70fff1733cb9a70a35b9057637e11cde68e30f6f624b001504"
+
+  let expected_root =
+    #"9ea42e89c070ee103f27ae748c0aa9ce268d2f44e66568423409fa4f659cdb7a"
+
+  // #"55d5551e8e1323d35afe53cf8698867c9de9a408e97ee968dc8414d527cc719c"
+  let member = "banana (328)"
+
+  let data_serializer = identity
+
+  let proof_block =
+    MerkleProofBlock {
+      left_leaf: merkle_lower_bound,
+      right_leaf: #"7cf7b9047b2ebdf8bcd289e621c7a8bd304f77f312c287c41848605d8b0deb70",
+      left_proofs: "",
+      right_proofs: #"",
+      continuing_side_proofs: "",
+      // 01 for Left, ff for Height, rest is the hash of the right side of the tree
+      remaining_proofs: #"01ffdb65bcd7895000b3a79103f0e4089eb8f7c1521fe372b388630e38883ad5e832",
+      left_right_intersection: 254,
+      intersecting_level: 253,
+    }
+
+  let actual_root = add_member(member, data_serializer, proof_block, old_root)
+
+  expected_root == actual_root
+}
+
+test sparse_merkle_proof_4() {
+  let old_root =
+    #"9ea42e89c070ee103f27ae748c0aa9ce268d2f44e66568423409fa4f659cdb7a"
+
+  let expected_root =
+    #"8333b7d8020aa5101ae770c2b8ea84ad84834ea106413d309fbbf226816b6a17"
+
+  // #"3378b5c960257ffe7c3e86d00563739bdf7db730e10732f6b943a4c1802fd05e"
+  let member = "blackberry (0)"
+
+  let data_serializer = identity
+
+  let proof_block =
+    MerkleProofBlock {
+      left_leaf: merkle_lower_bound,
+      right_leaf: #"55d5551e8e1323d35afe53cf8698867c9de9a408e97ee968dc8414d527cc719c",
+      left_proofs: #"",
+      right_proofs: bytearray.concat(
+        #"fd",
+        bytearray.concat(
+          leaf_byte,
+          #"7cf7b9047b2ebdf8bcd289e621c7a8bd304f77f312c287c41848605d8b0deb70",
+        )
+          |> hash.blake2b_256,
+      ),
+      continuing_side_proofs: "",
+      // 01 for Left, ff for Height, rest is the hash of the right side of the tree
+      remaining_proofs: #"01ffdb65bcd7895000b3a79103f0e4089eb8f7c1521fe372b388630e38883ad5e832",
+      left_right_intersection: 254,
+      intersecting_level: 253,
+    }
+
+  let actual_root = add_member(member, data_serializer, proof_block, old_root)
+
+  expected_root == actual_root
+}