diff --git a/test/parallel/test-tls-0-dns-altname.js b/test/parallel/test-tls-0-dns-altname.js
index 61458142bc0115..95ceb1aa59aaea 100644
--- a/test/parallel/test-tls-0-dns-altname.js
+++ b/test/parallel/test-tls-0-dns-altname.js
@@ -9,7 +9,6 @@ if (!common.hasCrypto) {
 var tls = require('tls');
 
 var fs = require('fs');
-var net = require('net');
 
 var common = require('../common');
 
diff --git a/test/parallel/test-tls-async-cb-after-socket-end.js b/test/parallel/test-tls-async-cb-after-socket-end.js
index ea40205bfff06f..d89a4e9930ca6a 100644
--- a/test/parallel/test-tls-async-cb-after-socket-end.js
+++ b/test/parallel/test-tls-async-cb-after-socket-end.js
@@ -2,7 +2,6 @@
 
 var common = require('../common');
 
-var assert = require('assert');
 var path = require('path');
 var fs = require('fs');
 var constants = require('constants');
diff --git a/test/parallel/test-tls-client-default-ciphers.js b/test/parallel/test-tls-client-default-ciphers.js
index e38671fd6f9de1..9905fc45bdcd24 100644
--- a/test/parallel/test-tls-client-default-ciphers.js
+++ b/test/parallel/test-tls-client-default-ciphers.js
@@ -19,7 +19,7 @@ function test1() {
   };
 
   try {
-    var s = tls.connect(common.PORT);
+    tls.connect(common.PORT);
   } catch (e) {
     assert(e instanceof Done);
   }
diff --git a/test/parallel/test-tls-close-error.js b/test/parallel/test-tls-close-error.js
index 5c5a797c280a7d..bd38cb55f7a17b 100644
--- a/test/parallel/test-tls-close-error.js
+++ b/test/parallel/test-tls-close-error.js
@@ -10,7 +10,6 @@ if (!common.hasCrypto) {
 var tls = require('tls');
 
 var fs = require('fs');
-var net = require('net');
 
 var errorCount = 0;
 var closeCount = 0;
diff --git a/test/parallel/test-tls-close-notify.js b/test/parallel/test-tls-close-notify.js
index 5cc3021ab8dd7e..5545f4512d5f39 100644
--- a/test/parallel/test-tls-close-notify.js
+++ b/test/parallel/test-tls-close-notify.js
@@ -9,7 +9,6 @@ if (!common.hasCrypto) {
 var tls = require('tls');
 
 var fs = require('fs');
-var net = require('net');
 
 var ended = 0;
 
diff --git a/test/parallel/test-tls-destroy-whilst-write.js b/test/parallel/test-tls-destroy-whilst-write.js
index f42ed1d4ea7702..26c20264735926 100644
--- a/test/parallel/test-tls-destroy-whilst-write.js
+++ b/test/parallel/test-tls-destroy-whilst-write.js
@@ -1,5 +1,4 @@
 'use strict';
-var assert = require('assert');
 var common = require('../common');
 
 if (!common.hasCrypto) {
diff --git a/test/parallel/test-tls-fast-writing.js b/test/parallel/test-tls-fast-writing.js
index 009fa40b631ee5..1f65391480d59d 100644
--- a/test/parallel/test-tls-fast-writing.js
+++ b/test/parallel/test-tls-fast-writing.js
@@ -20,7 +20,7 @@ var server = tls.createServer(options, onconnection);
 var gotChunk = false;
 var gotDrain = false;
 
-var timer = setTimeout(function() {
+setTimeout(function() {
   console.log('not ok - timed out');
   process.exit(1);
 }, common.platformTimeout(500));
diff --git a/test/parallel/test-tls-handshake-error.js b/test/parallel/test-tls-handshake-error.js
index f33177455f8943..f65440ed93b1a3 100644
--- a/test/parallel/test-tls-handshake-error.js
+++ b/test/parallel/test-tls-handshake-error.js
@@ -10,7 +10,6 @@ if (!common.hasCrypto) {
 var tls = require('tls');
 
 var fs = require('fs');
-var net = require('net');
 
 var errorCount = 0;
 var closeCount = 0;
diff --git a/test/parallel/test-tls-handshake-nohang.js b/test/parallel/test-tls-handshake-nohang.js
index ae07551ef98088..374ac02a2f45b5 100644
--- a/test/parallel/test-tls-handshake-nohang.js
+++ b/test/parallel/test-tls-handshake-nohang.js
@@ -1,6 +1,5 @@
 'use strict';
 var common = require('../common');
-var assert = require('assert');
 
 if (!common.hasCrypto) {
   console.log('1..0 # Skipped: missing crypto');
diff --git a/test/parallel/test-tls-invoke-queued.js b/test/parallel/test-tls-invoke-queued.js
index f833108ea3f9e0..efa5c0aa9aa31d 100644
--- a/test/parallel/test-tls-invoke-queued.js
+++ b/test/parallel/test-tls-invoke-queued.js
@@ -9,7 +9,6 @@ if (!common.hasCrypto) {
 var tls = require('tls');
 
 var fs = require('fs');
-var net = require('net');
 
 
 var received = '';
diff --git a/test/parallel/test-tls-key-mismatch.js b/test/parallel/test-tls-key-mismatch.js
index f7919c545aefb1..2e17a4931078c7 100644
--- a/test/parallel/test-tls-key-mismatch.js
+++ b/test/parallel/test-tls-key-mismatch.js
@@ -14,8 +14,6 @@ var options = {
   cert: fs.readFileSync(common.fixturesDir + '/keys/agent2-cert.pem')
 };
 
-var cert = null;
-
 assert.throws(function() {
   tls.createSecureContext(options);
 });
diff --git a/test/parallel/test-tls-max-send-fragment.js b/test/parallel/test-tls-max-send-fragment.js
index cc9413b81e78d6..8b1bf0998aad30 100644
--- a/test/parallel/test-tls-max-send-fragment.js
+++ b/test/parallel/test-tls-max-send-fragment.js
@@ -9,7 +9,6 @@ if (!common.hasCrypto) {
 var tls = require('tls');
 
 var fs = require('fs');
-var net = require('net');
 
 var common = require('../common');
 
diff --git a/test/parallel/test-tls-ocsp-callback.js b/test/parallel/test-tls-ocsp-callback.js
index a11be7ac22d1c5..e9443f45357995 100644
--- a/test/parallel/test-tls-ocsp-callback.js
+++ b/test/parallel/test-tls-ocsp-callback.js
@@ -41,7 +41,6 @@ function test(testOptions, cb) {
   var clientSecure = 0;
   var ocspCount = 0;
   var ocspResponse;
-  var session;
 
   if (testOptions.pfx) {
     delete options.key;
diff --git a/test/parallel/test-tls-peer-certificate-encoding.js b/test/parallel/test-tls-peer-certificate-encoding.js
index 96cb6944ef6a97..32b1583a0c4840 100644
--- a/test/parallel/test-tls-peer-certificate-encoding.js
+++ b/test/parallel/test-tls-peer-certificate-encoding.js
@@ -11,7 +11,6 @@ var tls = require('tls');
 var fs = require('fs');
 var util = require('util');
 var join = require('path').join;
-var spawn = require('child_process').spawn;
 
 var options = {
   key: fs.readFileSync(join(common.fixturesDir, 'keys', 'agent5-key.pem')),
diff --git a/test/parallel/test-tls-peer-certificate-multi-keys.js b/test/parallel/test-tls-peer-certificate-multi-keys.js
index fca7a1a77dda67..50ce9037f8d755 100644
--- a/test/parallel/test-tls-peer-certificate-multi-keys.js
+++ b/test/parallel/test-tls-peer-certificate-multi-keys.js
@@ -11,7 +11,6 @@ var tls = require('tls');
 var fs = require('fs');
 var util = require('util');
 var join = require('path').join;
-var spawn = require('child_process').spawn;
 
 var options = {
   key: fs.readFileSync(join(common.fixturesDir, 'agent.key')),
diff --git a/test/parallel/test-tls-peer-certificate.js b/test/parallel/test-tls-peer-certificate.js
index 3cb0eef2d56268..cdf8bf5644f675 100644
--- a/test/parallel/test-tls-peer-certificate.js
+++ b/test/parallel/test-tls-peer-certificate.js
@@ -11,7 +11,6 @@ var tls = require('tls');
 var fs = require('fs');
 var util = require('util');
 var join = require('path').join;
-var spawn = require('child_process').spawn;
 
 var options = {
   key: fs.readFileSync(join(common.fixturesDir, 'keys', 'agent1-key.pem')),
diff --git a/test/parallel/test-tls-request-timeout.js b/test/parallel/test-tls-request-timeout.js
index a9b1c78c91a0bf..0db2a613afc9e4 100644
--- a/test/parallel/test-tls-request-timeout.js
+++ b/test/parallel/test-tls-request-timeout.js
@@ -29,7 +29,7 @@ var server = tls.Server(options, function(socket) {
 });
 
 server.listen(common.PORT, function() {
-  var socket = tls.connect({
+  tls.connect({
     port: common.PORT,
     rejectUnauthorized: false
   });
diff --git a/test/parallel/test-tls-socket-default-options.js b/test/parallel/test-tls-socket-default-options.js
index 7b41d0f5a9ec23..c2c6e518bbc4d8 100644
--- a/test/parallel/test-tls-socket-default-options.js
+++ b/test/parallel/test-tls-socket-default-options.js
@@ -9,7 +9,6 @@ if (!common.hasCrypto) {
 const tls = require('tls');
 
 const fs = require('fs');
-const net = require('net');
 
 const sent = 'hello world';
 
diff --git a/test/parallel/test-tls-ticket-cluster.js b/test/parallel/test-tls-ticket-cluster.js
index fc0f1d5e858d00..1fd1776ca8199f 100644
--- a/test/parallel/test-tls-ticket-cluster.js
+++ b/test/parallel/test-tls-ticket-cluster.js
@@ -42,7 +42,6 @@ if (cluster.isMaster) {
 
   function fork() {
     var worker = cluster.fork();
-    var workerReqCount = 0;
     worker.on('message', function(msg) {
       console.error('[master] got %j', msg);
       if (msg === 'reused') {