diff --git a/contracts/tests/merkle-tree.ts b/contracts/tests/merkle-tree.ts
index f46e9662f77..41dc87a886b 100644
--- a/contracts/tests/merkle-tree.ts
+++ b/contracts/tests/merkle-tree.ts
@@ -12,7 +12,7 @@ export type Tree = {
     root: Buffer,
 }
 
-type TreeNode = {
+export type TreeNode = {
     node: Buffer,
     left: TreeNode | undefined,
     right: TreeNode | undefined,