diff --git a/src/lib/waku_message/index.spec.ts b/src/lib/waku_message/index.spec.ts
index 84084b78af..2403de9fb3 100644
--- a/src/lib/waku_message/index.spec.ts
+++ b/src/lib/waku_message/index.spec.ts
@@ -83,7 +83,7 @@ describe("Waku Message: Browser & Node", function () {
     await fc.assert(
       fc.asyncProperty(
         fc.uint8Array({ minLength: 1 }),
-        fc.uint8Array({ minLength: 32, maxLength: 32 }),
+        fc.uint8Array({ min: 1, minLength: 32, maxLength: 32 }),
         async (payload, key) => {
           const msg = await WakuMessage.fromBytes(payload, TestContentTopic, {
             symKey: key,
@@ -102,8 +102,8 @@ describe("Waku Message: Browser & Node", function () {
     await fc.assert(
       fc.asyncProperty(
         fc.uint8Array({ minLength: 1 }),
-        fc.uint8Array({ minLength: 32, maxLength: 32 }),
-        fc.uint8Array({ minLength: 32, maxLength: 32 }),
+        fc.uint8Array({ min: 1, minLength: 32, maxLength: 32 }),
+        fc.uint8Array({ min: 1, minLength: 32, maxLength: 32 }),
         async (payload, sigPrivKey, symKey) => {
           const sigPubKey = getPublicKey(sigPrivKey);