diff --git a/bench/tx.js b/bench/tx.js
index 92aaf387..9774242e 100644
--- a/bench/tx.js
+++ b/bench/tx.js
@@ -1,7 +1,5 @@
 'use strict';
 
-const fs = require('../lib/utils/fs');
-const Block = require('../lib/primitives/block');
 const Address = require('../lib/primitives/address');
 const TX = require('../lib/primitives/tx');
 const Script = require('../lib/script/script');
diff --git a/test/block-test.js b/test/block-test.js
index e4ecd1de..12f87dea 100644
--- a/test/block-test.js
+++ b/test/block-test.js
@@ -4,11 +4,9 @@
 'use strict';
 
 const assert = require('./util/assert');
-const fs = require('../lib/utils/fs');
 const common = require('./util/common');
 const Bloom = require('../lib/utils/bloom');
 const Block = require('../lib/primitives/block');
-const Headers = require('../lib/primitives/headers');
 const MerkleBlock = require('../lib/primitives/merkleblock');
 const consensus = require('../lib/protocol/consensus');
 const Script = require('../lib/script/script');
@@ -365,11 +363,11 @@ describe('Block', function() {
       const [block, view] = ctx.getBlock();
       const flags = Script.flags.VERIFY_P2SH | Script.flags.VERIFY_WITNESS;
 
-      let sigops = 0;
+      let count = 0;
       for (const tx of block.txs)
-        sigops += tx.getSigopsCost(view, flags);
+        count += tx.getSigopsCost(view, flags);
 
-      assert.strictEqual(sigops, sigops);
+      assert.strictEqual(count, sigops);
       assert.strictEqual(block.getWeight(), weight);
       block.refresh();
       assert.strictEqual(block.getWeight(), weight);
diff --git a/test/util/common.js b/test/util/common.js
index 6fbf3434..149cb342 100644
--- a/test/util/common.js
+++ b/test/util/common.js
@@ -75,8 +75,6 @@ common.writeBlock = function writeBlock(name, block, view) {
 };
 
 common.writeTX = function writeTX(name, tx, view) {
-  const index = name.substring(2);
-
   common.writeFile(`${name}.raw`, tx.toRaw());
 
   if (!view)