diff --git a/lib/blockchain/chain.js b/lib/blockchain/chain.js
index 91e0e3a9..b57fde6a 100644
--- a/lib/blockchain/chain.js
+++ b/lib/blockchain/chain.js
@@ -600,7 +600,7 @@ Chain.prototype.verifyInputs = async function verifyInputs(block, prev, state) {
 
     // Ensure tx is not double spending an output.
     if (i > 0) {
-      if (!(await view.spendInputs(this.db, tx))) {
+      if (!await view.spendInputs(this.db, tx)) {
         assert(!historical, 'BUG: Spent inputs in historical data!');
         throw new VerifyError(block,
           'invalid',
@@ -684,7 +684,7 @@ Chain.prototype.verifyInputs = async function verifyInputs(block, prev, state) {
   }
 
   // Verify all txs in parallel.
-  if (!(await co.every(jobs))) {
+  if (!await co.every(jobs)) {
     throw new VerifyError(block,
       'invalid',
       'mandatory-script-verify-flag-failed',
@@ -1137,7 +1137,7 @@ Chain.prototype._replay = async function _replay(block, silent) {
   if (!entry)
     throw new Error('Block not found.');
 
-  if (!(await entry.isMainChain()))
+  if (!await entry.isMainChain())
     throw new Error('Cannot reset on alternate chain.');
 
   if (entry.isGenesis()) {
diff --git a/lib/blockchain/chaindb.js b/lib/blockchain/chaindb.js
index f7253772..5fe9a178 100644
--- a/lib/blockchain/chaindb.js
+++ b/lib/blockchain/chaindb.js
@@ -1201,7 +1201,7 @@ ChainDB.prototype.scan = async function scan(start, filter, iter) {
   if (!entry)
     return;
 
-  if (!(await entry.isMainChain()))
+  if (!await entry.isMainChain())
     throw new Error('Cannot rescan an alternate chain.');
 
   let total = 0;
@@ -1478,7 +1478,7 @@ ChainDB.prototype.reset = async function reset(block) {
   if (!entry)
     throw new Error('Block not found.');
 
-  if (!(await entry.isMainChain()))
+  if (!await entry.isMainChain())
     throw new Error('Cannot reset on alternate chain.');
 
   if (this.options.prune)
diff --git a/lib/coins/coinview.js b/lib/coins/coinview.js
index ee929c54..83689625 100644
--- a/lib/coins/coinview.js
+++ b/lib/coins/coinview.js
@@ -432,7 +432,7 @@ CoinView.prototype.readInputs = async function readInputs(db, tx) {
   let found = true;
 
   for (const {prevout} of tx.inputs) {
-    if (!(await this.readCoin(db, prevout)))
+    if (!await this.readCoin(db, prevout))
       found = false;
   }
 
diff --git a/lib/http/server.js b/lib/http/server.js
index 09c2bf1e..88d20394 100644
--- a/lib/http/server.js
+++ b/lib/http/server.js
@@ -446,7 +446,7 @@ HTTPServer.prototype.handleAuth = function handleAuth(socket) {
     if (!entry)
       return null;
 
-    if (!(await entry.isMainChain()))
+    if (!await entry.isMainChain())
       return null;
 
     return entry.toRaw();
diff --git a/lib/mempool/mempool.js b/lib/mempool/mempool.js
index 5f26260b..44dbeb06 100644
--- a/lib/mempool/mempool.js
+++ b/lib/mempool/mempool.js
@@ -782,7 +782,7 @@ Mempool.prototype.insertTX = async function insertTX(tx, id) {
   }
 
   // Verify transaction finality (see isFinal()).
-  if (!(await this.verifyFinal(tx, lockFlags))) {
+  if (!await this.verifyFinal(tx, lockFlags)) {
     throw new VerifyError(tx,
       'nonstandard',
       'non-final',
@@ -864,7 +864,7 @@ Mempool.prototype.verify = async function verify(entry, view) {
   const tx = entry.tx;
 
   // Verify sequence locks.
-  if (!(await this.verifyLocks(tx, view, lockFlags))) {
+  if (!await this.verifyLocks(tx, view, lockFlags)) {
     throw new VerifyError(tx,
       'nonstandard',
       'non-BIP68-final',
diff --git a/lib/net/pool.js b/lib/net/pool.js
index 3db7ba69..f8c99870 100644
--- a/lib/net/pool.js
+++ b/lib/net/pool.js
@@ -1717,7 +1717,7 @@ Pool.prototype.handleBlockInv = async function handleBlockInv(peer, hashes) {
     }
 
     // Request the block if we don't have it.
-    if (!(await this.hasBlock(hash))) {
+    if (!await this.hasBlock(hash)) {
       items.push(hash);
       continue;
     }
diff --git a/lib/wallet/nodeclient.js b/lib/wallet/nodeclient.js
index 5df73938..17e3a721 100644
--- a/lib/wallet/nodeclient.js
+++ b/lib/wallet/nodeclient.js
@@ -108,7 +108,7 @@ NodeClient.prototype.getEntry = async function getEntry(hash) {
   if (!entry)
     return null;
 
-  if (!(await entry.isMainChain()))
+  if (!await entry.isMainChain())
     return null;
 
   return entry;
diff --git a/lib/wallet/rpc.js b/lib/wallet/rpc.js
index 08eb99f2..2399bcfd 100644
--- a/lib/wallet/rpc.js
+++ b/lib/wallet/rpc.js
@@ -1512,7 +1512,7 @@ RPC.prototype.importPrunedFunds = async function importPrunedFunds(args, help) {
     height: height
   };
 
-  if (!(await this.wdb.addTX(tx, entry)))
+  if (!await this.wdb.addTX(tx, entry))
     throw new RPCError(errs.WALLET_ERROR, 'No tracked address for TX.');
 
   return null;
@@ -1529,7 +1529,7 @@ RPC.prototype.removePrunedFunds = async function removePrunedFunds(args, help) {
   if (!hash)
     throw new RPCError(errs.TYPE_ERROR, 'Invalid parameter.');
 
-  if (!(await wallet.remove(hash)))
+  if (!await wallet.remove(hash))
     throw new RPCError(errs.WALLET_ERROR, 'Transaction not in wallet.');
 
   return null;
diff --git a/migrate/chaindb2to3.js b/migrate/chaindb2to3.js
index 98164e23..89899cfb 100644
--- a/migrate/chaindb2to3.js
+++ b/migrate/chaindb2to3.js
@@ -162,7 +162,7 @@ async function reserializeUndo(hash) {
     }
 
     if (!blockData) {
-      if (!(await isPruned()))
+      if (!await isPruned())
         throw new Error(`Block not found: ${tip.hash}.`);
       break;
     }
diff --git a/test/chain-test.js b/test/chain-test.js
index 1f24b6d2..19d0a895 100644
--- a/test/chain-test.js
+++ b/test/chain-test.js
@@ -137,7 +137,7 @@ describe('Chain', function() {
       assert(tip1);
       assert(tip2);
 
-      assert(!(await tip2.isMainChain()));
+      assert(!await tip2.isMainChain());
     }
   });
 
diff --git a/test/node-test.js b/test/node-test.js
index 440e7f07..e5a37e2e 100644
--- a/test/node-test.js
+++ b/test/node-test.js
@@ -93,7 +93,7 @@ describe('Node', function() {
       assert(tip1);
       assert(tip2);
 
-      assert(!(await tip2.isMainChain()));
+      assert(!await tip2.isMainChain());
 
       await co.wait();
     }