diff --git a/nim-waku b/nim-waku
index 4ae1cd4737..d1c1a0ca13 160000
--- a/nim-waku
+++ b/nim-waku
@@ -1 +1 @@
-Subproject commit 4ae1cd4737dacdd30f879eea199e0a89a9c1532e
+Subproject commit d1c1a0ca13e3aa2690a6550faca13210e1f46877
diff --git a/src/test_utils/nim_waku.spec.ts b/src/test_utils/nim_waku.spec.ts
index fca582043e..2443ed034a 100644
--- a/src/test_utils/nim_waku.spec.ts
+++ b/src/test_utils/nim_waku.spec.ts
@@ -22,7 +22,7 @@ it('Correctly serialized arguments', function () {
 
 it('Convert utf-8 string to hex', function () {
   const str = 'This is an utf-8 string.';
-  const expected = '0x5468697320697320616e207574662d3820737472696e672e';
+  const expected = '5468697320697320616e207574662d3820737472696e672e';
 
   const actual = strToHex(str);
   expect(actual).deep.equal(expected);
@@ -55,7 +55,7 @@ it('Convert buffer to hex', function () {
     0x67,
     0x2e,
   ]);
-  const expected = '0x5468697320697320616e207574662d3820737472696e672e';
+  const expected = '5468697320697320616e207574662d3820737472696e672e';
 
   const actual = bufToHex(buf);
   expect(actual).to.deep.equal(expected);
diff --git a/src/test_utils/nim_waku.ts b/src/test_utils/nim_waku.ts
index 484e93ce04..34e7e6e9f1 100644
--- a/src/test_utils/nim_waku.ts
+++ b/src/test_utils/nim_waku.ts
@@ -243,16 +243,13 @@ export function strToHex(str: string): string {
     hex = str;
     console.log('invalid text input: ' + str);
   }
-  return '0x' + hex;
+  return hex;
 }
 
 export function bufToHex(buffer: Uint8Array) {
-  return (
-    '0x' +
-    Array.prototype.map
-      .call(buffer, (x) => ('00' + x.toString(16)).slice(-2))
-      .join('')
-  );
+  return Array.prototype.map
+    .call(buffer, (x) => ('00' + x.toString(16)).slice(-2))
+    .join('');
 }
 
 interface RpcInfoResponse {