diff --git a/test/merkleproof.spec.js b/test/merkleproof.spec.js
index 504a71c..6094faa 100644
--- a/test/merkleproof.spec.js
+++ b/test/merkleproof.spec.js
@@ -23,12 +23,10 @@ contract('MerkleProof', function () {
       const proof = merkleTree.getHexProof(elements[0]);
 
       const leaf = bufferToHex(sha3(elements[0]));
-      console.log(root);
-      console.log(proof);
-      console.log(leaf);
-      var result = await MerkleProofWrapper.methods.verifyProof(proof, root, leaf).call();
-      console.log(result);
-      //assert(result, true);
+      
+      const result = await MerkleProofWrapper.methods.verifyProof(proof, root, leaf).call();
+
+      assert(result);
     });
 
     it('should return false for an invalid Merkle proof', async function () {
@@ -44,9 +42,9 @@ contract('MerkleProof', function () {
 
       const badProof = badMerkleTree.getHexProof(badElements[0]);
 
-      var result = await MerkleProofWrapper.methods.verifyProof(badProof, correctRoot, correctLeaf).call();
-      console.log(result);
-      //assert(result, false);
+      const result = await MerkleProofWrapper.methods.verifyProof(badProof, correctRoot, correctLeaf).call();
+      
+      assert(!result);
     });
 
     it('should return false for a Merkle proof of invalid length', async function () {
@@ -60,9 +58,9 @@ contract('MerkleProof', function () {
 
       const leaf = bufferToHex(sha3(elements[0]));
 
-      var result = await MerkleProofWrapper.methods.verifyProof(badProof, root, leaf).call()
-      console.log(result);
-      //assert(result, false);
+      const result = await MerkleProofWrapper.methods.verifyProof(badProof, root, leaf).call()
+      
+      assert(!result);
     });
   });
 });
diff --git a/utils/merkleTree.js b/utils/merkleTree.js
index a8f4b7c..bdc7e80 100644
--- a/utils/merkleTree.js
+++ b/utils/merkleTree.js
@@ -121,8 +121,8 @@ class MerkleTree {
     if (arr.some(el => !Buffer.isBuffer(el))) {
       throw new Error("Array is not an array of buffers");
     }
-
-    return "0x" + arr.map(el => el.toString("hex")).join("");
+    
+    return arr.map(el => '0x' + el.toString('hex'));
   }
 
   sortAndConcat(...args) {