diff --git a/test/chain-test.js b/test/chain-test.js
index c066d920..298cc5a8 100644
--- a/test/chain-test.js
+++ b/test/chain-test.js
@@ -10,6 +10,7 @@ const encoding = require('../lib/utils/encoding');
 const Coin = require('../lib/primitives/coin');
 const Script = require('../lib/script/script');
 const Chain = require('../lib/blockchain/chain');
+const WorkerPool = require('../lib/workers/workerpool');
 const Miner = require('../lib/mining/miner');
 const MTX = require('../lib/primitives/mtx');
 const MemWallet = require('./util/memwallet');
@@ -20,14 +21,20 @@ const opcodes = Script.opcodes;
 
 const network = Network.get('regtest');
 
+const workers = new WorkerPool({
+  enabled: true
+});
+
 const chain = new Chain({
   db: 'memory',
-  network
+  network,
+  workers
 });
 
 const miner = new Miner({
   chain,
-  version: 4
+  version: 4,
+  workers
 });
 
 const cpu = miner.cpu;
diff --git a/test/http-test.js b/test/http-test.js
index 3a651376..f29632b3 100644
--- a/test/http-test.js
+++ b/test/http-test.js
@@ -20,6 +20,7 @@ const node = new FullNode({
   apiKey: 'foo',
   walletAuth: true,
   db: 'memory',
+  workers: true,
   plugins: [require('../lib/wallet/plugin')]
 });
 
diff --git a/test/mempool-test.js b/test/mempool-test.js
index 593d5bfd..47e385b7 100644
--- a/test/mempool-test.js
+++ b/test/mempool-test.js
@@ -8,6 +8,7 @@ const encoding = require('../lib/utils/encoding');
 const random = require('../lib/crypto/random');
 const MempoolEntry = require('../lib/mempool/mempoolentry');
 const Mempool = require('../lib/mempool/mempool');
+const WorkerPool = require('../lib/workers/workerpool');
 const Chain = require('../lib/blockchain/chain');
 const MTX = require('../lib/primitives/mtx');
 const Coin = require('../lib/primitives/coin');
@@ -19,13 +20,19 @@ const Witness = require('../lib/script/witness');
 const MemWallet = require('./util/memwallet');
 const ALL = Script.hashType.ALL;
 
+const workers = new WorkerPool({
+  enabled: true
+});
+
 const chain = new Chain({
-  db: 'memory'
+  db: 'memory',
+  workers
 });
 
 const mempool = new Mempool({
   chain,
-  db: 'memory'
+  db: 'memory',
+  workers
 });
 
 const wallet = new MemWallet();
diff --git a/test/wallet-test.js b/test/wallet-test.js
index dee411c1..9dfe2294 100644
--- a/test/wallet-test.js
+++ b/test/wallet-test.js
@@ -10,6 +10,7 @@ const encoding = require('../lib/utils/encoding');
 const digest = require('../lib/crypto/digest');
 const random = require('../lib/crypto/random');
 const WalletDB = require('../lib/wallet/walletdb');
+const WorkerPool = require('../lib/workers/workerpool');
 const Address = require('../lib/primitives/address');
 const MTX = require('../lib/primitives/mtx');
 const Coin = require('../lib/primitives/coin');
@@ -25,9 +26,14 @@ const KEY1 = 'xprv9s21ZrQH143K3Aj6xQBymM31Zb4BVc7wxqfUhMZrzewdDVCt'
 const KEY2 = 'xprv9s21ZrQH143K3mqiSThzPtWAabQ22Pjp3uSNnZ53A5bQ4udp'
   + 'faKekc2m4AChLYH1XDzANhrSdxHYWUeTWjYJwFwWFyHkTMnMeAcW4JyRCZa';
 
+const workers = new WorkerPool({
+  enabled: true
+});
+
 const wdb = new WalletDB({
   db: 'memory',
-  verify: true
+  verify: true,
+  workers
 });
 
 let currentWallet = null;