diff --git a/test/unit/nonce-tracker-test.js b/test/unit/nonce-tracker-test.js
index 16cd6d008..b0283e159 100644
--- a/test/unit/nonce-tracker-test.js
+++ b/test/unit/nonce-tracker-test.js
@@ -18,11 +18,13 @@ describe('Nonce Tracker', function () {
 
 
     getPendingTransactions = () => pendingTxs
-    provider = { sendAsync: (_, cb) => { cb(undefined, {result: '0x0'}) } }
-    nonceTracker = new NonceTracker({
-      blockTracker: {
+    provider = {
+      sendAsync: (_, cb) => { cb(undefined, {result: '0x0'}) },
+      _blockTracker: {
         getCurrentBlock: () => '0x11b568',
       },
+    }
+    nonceTracker = new NonceTracker({
       provider,
       getPendingTransactions,
     })