diff --git a/packages/circuits/tests/semaphore.test.ts b/packages/circuits/tests/semaphore.test.ts
index 06f008474..b9abcb4d6 100644
--- a/packages/circuits/tests/semaphore.test.ts
+++ b/packages/circuits/tests/semaphore.test.ts
@@ -45,7 +45,7 @@ describe("semaphore", () => {
     }
 
     const INPUT = {
-        secret: deriveSecretScalar(secret),
+        secret: deriveSecretScalar(secret) as `${number}`,
         merkleProofLength: tree.depth,
         merkleProofIndices,
         merkleProofSiblings,