From 2954a3fc82b5a1c411bb711dd1aaf03d9cc265db Mon Sep 17 00:00:00 2001
From: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Date: Sat, 12 Sep 2015 21:33:09 +0530
Subject: [PATCH 1/2] test: preload `common` module in test-runner

Preloading `common` module will make sure that we don't have to
explicitly import it in the tests unless necessary. This module
has few stuff, like global variables leakage checking, clearing
common PIPEs etc, which are necessary for most of the tests.
---
 test/common.js                                |  6 +++++
 test/fixtures/common-detect-global-leak.js    |  1 +
 test/parallel/test-cluster-debug-port.js      |  7 +++++-
 .../test-common-detect-global-leak.js         | 24 +++++++++++++++++++
 test/parallel/test-domain-crypto.js           |  6 +++++
 .../test-regression-object-prototype.js       |  7 ------
 test/parallel/test-repl-autolibs.js           |  7 ++++++
 test/sequential/test-module-loading.js        |  6 ++++-
 test/testpy/__init__.py                       |  5 ++--
 9 files changed, 58 insertions(+), 11 deletions(-)
 create mode 100644 test/fixtures/common-detect-global-leak.js
 create mode 100644 test/parallel/test-common-detect-global-leak.js
 delete mode 100644 test/parallel/test-regression-object-prototype.js

diff --git a/test/common.js b/test/common.js
index 9859db24cd78..94152094f9f0 100644
--- a/test/common.js
+++ b/test/common.js
@@ -247,6 +247,12 @@ var knownGlobals = [setTimeout,
                     process,
                     global];
 
+/*
+ * Exporting this, because we can add additional purposefully leaked stuff if
+ * the test needs.
+ */
+exports.knownGlobals = knownGlobals;
+
 if (global.gc) {
   knownGlobals.push(gc);
 }
diff --git a/test/fixtures/common-detect-global-leak.js b/test/fixtures/common-detect-global-leak.js
new file mode 100644
index 000000000000..712ffd7a9102
--- /dev/null
+++ b/test/fixtures/common-detect-global-leak.js
@@ -0,0 +1 @@
+leak_this_to_global_space = 1
diff --git a/test/parallel/test-cluster-debug-port.js b/test/parallel/test-cluster-debug-port.js
index 1a42850e9b2b..d18c5ccd2786 100644
--- a/test/parallel/test-cluster-debug-port.js
+++ b/test/parallel/test-cluster-debug-port.js
@@ -4,7 +4,12 @@ const assert = require('assert');
 const cluster = require('cluster');
 
 if (cluster.isMaster) {
-  assert.strictEqual(process.execArgv.length, 0, 'run test with no args');
+  /*
+   * By default, the `-r` and `./test/common` will be passed, to preload common
+   * module. So, we are making sure that no other arguments are passed.
+   */
+  assert.strictEqual(process.execArgv.length, 2, 'run test with no args');
+  assert.deepStrictEqual(process.execArgv, ['-r', './test/common']);
 
   function checkExitCode(code, signal) {
     assert.strictEqual(code, 0);
diff --git a/test/parallel/test-common-detect-global-leak.js b/test/parallel/test-common-detect-global-leak.js
new file mode 100644
index 000000000000..155ace513c01
--- /dev/null
+++ b/test/parallel/test-common-detect-global-leak.js
@@ -0,0 +1,24 @@
+'use strict';
+
+const common = require('../common');
+const assert = require('assert');
+
+const child = require('child_process').spawn(process.execPath, [
+  '-r',
+  './test/common',
+  'test/fixtures/common-detect-global-leak.js'
+]);
+
+var stderrOutput = '';
+
+child.on('error', assert.fail);
+
+child.stdout.on('data', assert.fail);
+
+child.stderr.on('data', function(er) {
+  stderrOutput += er.toString('utf-8');
+});
+
+child.stderr.once('end', common.mustCall(function() {
+  assert(/Unknown globals: leak_this_to_global_space/.test(stderrOutput));
+}));
diff --git a/test/parallel/test-domain-crypto.js b/test/parallel/test-domain-crypto.js
index 00de1aee272b..35851e11c885 100644
--- a/test/parallel/test-domain-crypto.js
+++ b/test/parallel/test-domain-crypto.js
@@ -1,4 +1,5 @@
 /* eslint-disable strict */
+const common = require('../common');
 try {
   var crypto = require('crypto');
 } catch (e) {
@@ -8,6 +9,11 @@ try {
 
 // the missing var keyword is intentional
 domain = require('domain');
+/*
+ * Explicitly add the imported `domain` to the list of known globals. Otherwise
+ * it will be treated as leaked data and the test will fail.
+ */
+common.knownGlobals.push(domain);
 
 // should not throw a 'TypeError: undefined is not a function' exception
 crypto.randomBytes(8);
diff --git a/test/parallel/test-regression-object-prototype.js b/test/parallel/test-regression-object-prototype.js
deleted file mode 100644
index 040e718948a5..000000000000
--- a/test/parallel/test-regression-object-prototype.js
+++ /dev/null
@@ -1,7 +0,0 @@
-'use strict';
-//console.log('puts before');
-
-Object.prototype.xadsadsdasasdxx = function() {
-};
-
-console.log('puts after');
diff --git a/test/parallel/test-repl-autolibs.js b/test/parallel/test-repl-autolibs.js
index 4103a19243ae..c240e0c05b3f 100644
--- a/test/parallel/test-repl-autolibs.js
+++ b/test/parallel/test-repl-autolibs.js
@@ -1,4 +1,11 @@
 'use strict';
+/*
+ * Explicitly disable the global leaked data check, because the REPL module
+ * exports few objects to the global scope and the objects are not accessible
+ * here. So we cannot explicitly whitelist them by adding them to
+ * `common.knownGlobals`.
+ */
+require('../common').globalCheck = false;
 var assert = require('assert');
 var util = require('util');
 var repl = require('repl');
diff --git a/test/sequential/test-module-loading.js b/test/sequential/test-module-loading.js
index dfca2e420263..a0f1d8b07e7d 100644
--- a/test/sequential/test-module-loading.js
+++ b/test/sequential/test-module-loading.js
@@ -194,8 +194,12 @@ var children = module.children.reduce(function red(set, child) {
   return set;
 }, {});
 
+/*
+ * NOTE: common.js, which is required as the first module will not be included
+ * in the children, because it is preloaded by test-runner. So, it is not
+ * actually imported, but loaded from the cache.
+ */
 assert.deepEqual(children, {
-  'common.js': {},
   'fixtures/not-main-module.js': {},
   'fixtures/a.js': {
     'fixtures/b/c.js': {
diff --git a/test/testpy/__init__.py b/test/testpy/__init__.py
index 5933f8b9b62f..a4e782ec5338 100644
--- a/test/testpy/__init__.py
+++ b/test/testpy/__init__.py
@@ -49,7 +49,7 @@ def __init__(self, path, file, arch, mode, context, config, additional=[]):
     self.tmpdir = join(dirname(self.config.root), 'tmp')
     self.additional_flags = additional
 
-  
+
   def GetLabel(self):
     return "%s %s" % (self.mode, self.GetName())
 
@@ -57,7 +57,8 @@ def GetName(self):
     return self.path[-1]
 
   def GetCommand(self):
-    result = [self.config.context.GetVm(self.arch, self.mode)]
+    result = [self.config.context.GetVm(self.arch, self.mode),
+      '-r', './test/common']
     source = open(self.file).read()
     flags_match = FLAGS_PATTERN.search(source)
     if flags_match:

From 1151652b6c477cd02446f5ea1b8aeb840a8fd0b7 Mon Sep 17 00:00:00 2001
From: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Date: Sat, 12 Sep 2015 22:17:07 +0530
Subject: [PATCH 2/2] test: remove redundant `common` import

As the test-runner preloads `common` module, importing it in the test
is not necessary unless its properties are used. This commit removes
all such unnecessary imports.
---
 test/internet/test-dns-txt-sigsegv.js                          | 1 -
 test/internet/test-http-dns-fail.js                            | 1 -
 test/internet/test-net-connect-timeout.js                      | 1 -
 test/internet/test-net-connect-unref.js                        | 1 -
 test/message/2100bytes.js                                      | 1 -
 test/message/error_exit.js                                     | 1 -
 test/message/eval_messages.js                                  | 1 -
 test/message/hello_world.js                                    | 1 -
 test/message/max_tick_depth.js                                 | 1 -
 test/message/nexttick_throw.js                                 | 1 -
 test/message/stack_overflow.js                                 | 1 -
 test/message/stdin_messages.js                                 | 1 -
 test/message/throw_custom_error.js                             | 1 -
 test/message/throw_custom_error.out                            | 2 +-
 test/message/throw_in_line_with_tabs.js                        | 1 -
 test/message/throw_in_line_with_tabs.out                       | 2 +-
 test/message/throw_non_error.js                                | 1 -
 test/message/throw_non_error.out                               | 2 +-
 test/message/throw_null.js                                     | 1 -
 test/message/throw_null.out                                    | 2 +-
 test/message/throw_undefined.js                                | 1 -
 test/message/throw_undefined.out                               | 2 +-
 test/message/timeout_throw.js                                  | 1 -
 test/message/undefined_reference_in_new_context.js             | 1 -
 test/message/vm_display_runtime_error.js                       | 1 -
 test/message/vm_display_syntax_error.js                        | 1 -
 test/message/vm_dont_display_runtime_error.js                  | 1 -
 test/message/vm_dont_display_syntax_error.js                   | 1 -
 test/parallel/test-buffer-arraybuffer.js                       | 1 -
 test/parallel/test-buffer-ascii.js                             | 1 -
 test/parallel/test-buffer-bytelength.js                        | 1 -
 test/parallel/test-buffer-concat.js                            | 1 -
 test/parallel/test-buffer-fakes.js                             | 1 -
 test/parallel/test-buffer-indexof.js                           | 1 -
 test/parallel/test-buffer-inspect.js                           | 1 -
 test/parallel/test-buffer-iterator.js                          | 1 -
 test/parallel/test-buffer-slow.js                              | 1 -
 test/parallel/test-child-process-constructor.js                | 1 -
 test/parallel/test-child-process-detached.js                   | 1 -
 test/parallel/test-child-process-fork-and-spawn.js             | 1 -
 test/parallel/test-child-process-fork-ref.js                   | 1 -
 test/parallel/test-child-process-fork-ref2.js                  | 1 -
 test/parallel/test-child-process-internal.js                   | 1 -
 test/parallel/test-child-process-set-blocking.js               | 1 -
 test/parallel/test-child-process-silent.js                     | 1 -
 test/parallel/test-child-process-spawnsync-env.js              | 1 -
 test/parallel/test-child-process-spawnsync-timeout.js          | 1 -
 test/parallel/test-child-process-stdin-ipc.js                  | 1 -
 test/parallel/test-child-process-stdio-big-write-end.js        | 1 -
 test/parallel/test-child-process-validate-stdio.js             | 1 -
 test/parallel/test-cli-eval.js                                 | 3 +--
 test/parallel/test-cluster-debug-port.js                       | 1 -
 test/parallel/test-cluster-fork-env.js                         | 1 -
 test/parallel/test-cluster-net-listen.js                       | 1 -
 test/parallel/test-cluster-setup-master-argv.js                | 1 -
 test/parallel/test-cluster-setup-master-cumulative.js          | 1 -
 test/parallel/test-cluster-setup-master-emit.js                | 1 -
 test/parallel/test-cluster-setup-master-multiple.js            | 1 -
 test/parallel/test-cluster-setup-master.js                     | 1 -
 test/parallel/test-cluster-uncaught-exception.js               | 1 -
 test/parallel/test-cluster-worker-constructor.js               | 1 -
 test/parallel/test-cluster-worker-death.js                     | 1 -
 test/parallel/test-cluster-worker-init.js                      | 1 -
 test/parallel/test-console-instance.js                         | 1 -
 test/parallel/test-console-not-call-toString.js                | 1 -
 test/parallel/test-console.js                                  | 1 -
 test/parallel/test-delayed-require.js                          | 1 -
 test/parallel/test-dgram-bind.js                               | 1 -
 test/parallel/test-dgram-bytes-length.js                       | 1 -
 test/parallel/test-dgram-listen-after-bind.js                  | 1 -
 test/parallel/test-dgram-ref.js                                | 1 -
 test/parallel/test-dgram-regress-4496.js                       | 1 -
 test/parallel/test-dgram-send-bad-arguments.js                 | 1 -
 test/parallel/test-dgram-unref.js                              | 1 -
 test/parallel/test-dh-padding.js                               | 1 -
 test/parallel/test-dns-cares-domains.js                        | 1 -
 test/parallel/test-dns-lookup-cb-error.js                      | 1 -
 test/parallel/test-dns-regress-7070.js                         | 1 -
 test/parallel/test-dns.js                                      | 1 -
 test/parallel/test-domain-exit-dispose-again.js                | 1 -
 test/parallel/test-domain-exit-dispose.js                      | 1 -
 test/parallel/test-domain-from-timer.js                        | 1 -
 test/parallel/test-domain-implicit-fs.js                       | 1 -
 test/parallel/test-domain-nested-throw.js                      | 1 -
 test/parallel/test-domain-stack.js                             | 1 -
 test/parallel/test-domain-timers.js                            | 1 -
 test/parallel/test-domain.js                                   | 1 -
 test/parallel/test-event-emitter-add-listeners.js              | 1 -
 test/parallel/test-event-emitter-check-listener-leaks.js       | 1 -
 test/parallel/test-event-emitter-get-max-listeners.js          | 1 -
 test/parallel/test-event-emitter-listener-count.js             | 1 -
 test/parallel/test-event-emitter-listeners-side-effects.js     | 1 -
 test/parallel/test-event-emitter-listeners.js                  | 1 -
 test/parallel/test-event-emitter-max-listeners.js              | 1 -
 test/parallel/test-event-emitter-method-names.js               | 1 -
 test/parallel/test-event-emitter-modify-in-emit.js             | 1 -
 .../test-event-emitter-no-error-provided-to-error-event.js     | 1 -
 test/parallel/test-event-emitter-num-args.js                   | 1 -
 test/parallel/test-event-emitter-once.js                       | 1 -
 .../test-event-emitter-set-max-listeners-side-effects.js       | 1 -
 test/parallel/test-event-emitter-subclass.js                   | 1 -
 test/parallel/test-exception-handler.js                        | 1 -
 test/parallel/test-exception-handler2.js                       | 1 -
 test/parallel/test-exec-max-buffer.js                          | 1 -
 test/parallel/test-fs-exists.js                                | 1 -
 test/parallel/test-fs-make-callback.js                         | 1 -
 test/parallel/test-fs-null-bytes.js                            | 1 -
 test/parallel/test-fs-open-flags.js                            | 1 -
 test/parallel/test-fs-open.js                                  | 1 -
 test/parallel/test-fs-read-file-sync-hostname.js               | 1 -
 test/parallel/test-fs-readfile-zero-byte-liar.js               | 1 -
 test/parallel/test-fs-stat.js                                  | 1 -
 test/parallel/test-fs-sync-fd-leak.js                          | 1 -
 test/parallel/test-fs-write-no-fd.js                           | 1 -
 test/parallel/test-handle-wrap-close-abort.js                  | 1 -
 test/parallel/test-http-agent-false.js                         | 1 -
 test/parallel/test-http-agent-getname.js                       | 1 -
 test/parallel/test-http-client-readable.js                     | 1 -
 test/parallel/test-http-client-unescaped-path.js               | 1 -
 test/parallel/test-http-methods.js                             | 1 -
 test/parallel/test-http-parser-bad-ref.js                      | 1 -
 test/parallel/test-http-parser.js                              | 1 -
 .../test-http-url.parse-only-support-http-https-protocol.js    | 1 -
 test/parallel/test-internal-modules-expose.js                  | 1 -
 test/parallel/test-internal-modules.js                         | 1 -
 test/parallel/test-intl.js                                     | 1 -
 test/parallel/test-listen-fd-ebadf.js                          | 1 -
 test/parallel/test-microtask-queue-integration-domain.js       | 1 -
 test/parallel/test-microtask-queue-integration.js              | 1 -
 test/parallel/test-microtask-queue-run-domain.js               | 1 -
 test/parallel/test-microtask-queue-run-immediate-domain.js     | 1 -
 test/parallel/test-microtask-queue-run-immediate.js            | 1 -
 test/parallel/test-microtask-queue-run.js                      | 1 -
 test/parallel/test-net-dns-error.js                            | 1 -
 test/parallel/test-net-end-without-connect.js                  | 1 -
 test/parallel/test-net-isip.js                                 | 1 -
 test/parallel/test-net-listen-fd0.js                           | 1 -
 test/parallel/test-net-server-connections.js                   | 1 -
 test/parallel/test-net-server-unref-persistent.js              | 1 -
 test/parallel/test-next-tick-domain.js                         | 1 -
 test/parallel/test-next-tick-errors.js                         | 1 -
 test/parallel/test-next-tick-intentional-starvation.js         | 1 -
 test/parallel/test-next-tick-ordering.js                       | 1 -
 test/parallel/test-next-tick-ordering2.js                      | 1 -
 test/parallel/test-next-tick.js                                | 1 -
 test/parallel/test-path-zero-length-strings.js                 | 1 -
 test/parallel/test-pipe-return-val.js                          | 1 -
 test/parallel/test-preload.js                                  | 3 +--
 test/parallel/test-process-before-exit.js                      | 1 -
 test/parallel/test-process-config.js                           | 1 -
 test/parallel/test-process-env.js                              | 1 -
 test/parallel/test-process-exit-code.js                        | 1 -
 test/parallel/test-process-exit.js                             | 1 -
 test/parallel/test-process-getgroups.js                        | 1 -
 test/parallel/test-process-hrtime.js                           | 1 -
 test/parallel/test-process-kill-null.js                        | 1 -
 test/parallel/test-process-kill-pid.js                         | 1 -
 test/parallel/test-process-next-tick.js                        | 1 -
 test/parallel/test-process-raw-debug.js                        | 1 -
 test/parallel/test-process-wrap.js                             | 1 -
 test/parallel/test-promises-unhandled-rejections.js            | 1 -
 test/parallel/test-punycode.js                                 | 1 -
 test/parallel/test-querystring.js                              | 1 -
 test/parallel/test-readdouble.js                               | 1 -
 test/parallel/test-readfloat.js                                | 1 -
 test/parallel/test-readint.js                                  | 1 -
 test/parallel/test-readuint.js                                 | 1 -
 test/parallel/test-ref-unref-return.js                         | 1 -
 test/parallel/test-regress-GH-6235.js                          | 1 -
 test/parallel/test-regress-GH-7511.js                          | 3 +--
 test/parallel/test-regress-GH-897.js                           | 1 -
 test/parallel/test-repl-console.js                             | 3 +--
 test/parallel/test-repl-domain.js                              | 1 -
 test/parallel/test-repl-end-emits-exit.js                      | 3 +--
 test/parallel/test-repl-harmony.js                             | 1 -
 test/parallel/test-repl-require-cache.js                       | 3 +--
 test/parallel/test-repl-setprompt.js                           | 3 +--
 test/parallel/test-repl-syntax-error-handling.js               | 1 -
 test/parallel/test-repl-unexpected-token-recoverable.js        | 1 -
 test/parallel/test-require-cache.js                            | 1 -
 test/parallel/test-signal-safety.js                            | 1 -
 test/parallel/test-stdin-hang.js                               | 1 -
 test/parallel/test-stdio-readable-writable.js                  | 1 -
 test/parallel/test-stdout-close-unref.js                       | 1 -
 test/parallel/test-stream-big-packet.js                        | 1 -
 test/parallel/test-stream-big-push.js                          | 1 -
 test/parallel/test-stream-duplex.js                            | 1 -
 test/parallel/test-stream-end-paused.js                        | 1 -
 test/parallel/test-stream-ispaused.js                          | 1 -
 test/parallel/test-stream-pipe-after-end.js                    | 1 -
 test/parallel/test-stream-pipe-cleanup.js                      | 1 -
 test/parallel/test-stream-pipe-error-handling.js               | 1 -
 test/parallel/test-stream-pipe-event.js                        | 1 -
 test/parallel/test-stream-push-order.js                        | 1 -
 test/parallel/test-stream-push-strings.js                      | 1 -
 test/parallel/test-stream-readable-constructor-set-methods.js  | 1 -
 test/parallel/test-stream-readable-event.js                    | 1 -
 test/parallel/test-stream-readable-flow-recursion.js           | 1 -
 test/parallel/test-stream-transform-constructor-set-methods.js | 1 -
 test/parallel/test-stream-transform-objectmode-falsey-value.js | 1 -
 test/parallel/test-stream-transform-split-objectmode.js        | 1 -
 test/parallel/test-stream-unshift-empty-chunk.js               | 1 -
 test/parallel/test-stream-unshift-read-race.js                 | 1 -
 test/parallel/test-stream-wrap.js                              | 1 -
 test/parallel/test-stream-writable-change-default-encoding.js  | 1 -
 test/parallel/test-stream-writable-constructor-set-methods.js  | 1 -
 test/parallel/test-stream-writable-decoded-encoding.js         | 1 -
 test/parallel/test-stream-writev.js                            | 1 -
 test/parallel/test-stream2-base64-single-char-read-end.js      | 1 -
 test/parallel/test-stream2-compatibility.js                    | 1 -
 test/parallel/test-stream2-finish-pipe.js                      | 1 -
 test/parallel/test-stream2-large-read-stall.js                 | 1 -
 test/parallel/test-stream2-objects.js                          | 1 -
 test/parallel/test-stream2-pipe-error-handling.js              | 1 -
 test/parallel/test-stream2-pipe-error-once-listener.js         | 1 -
 test/parallel/test-stream2-push.js                             | 1 -
 test/parallel/test-stream2-read-sync-stack.js                  | 1 -
 test/parallel/test-stream2-readable-empty-buffer-no-eof.js     | 1 -
 test/parallel/test-stream2-readable-from-list.js               | 1 -
 test/parallel/test-stream2-readable-legacy-drain.js            | 1 -
 test/parallel/test-stream2-readable-non-empty-end.js           | 1 -
 test/parallel/test-stream2-readable-wrap-empty.js              | 1 -
 test/parallel/test-stream2-readable-wrap.js                    | 1 -
 test/parallel/test-stream2-set-encoding.js                     | 1 -
 test/parallel/test-stream2-transform.js                        | 1 -
 test/parallel/test-stream2-unpipe-leak.js                      | 1 -
 test/parallel/test-stream2-writable.js                         | 1 -
 test/parallel/test-stream3-pause-then-read.js                  | 1 -
 test/parallel/test-string-decoder.js                           | 1 -
 test/parallel/test-stringbytes-external.js                     | 1 -
 test/parallel/test-timers-args.js                              | 1 -
 test/parallel/test-timers-immediate-queue.js                   | 1 -
 test/parallel/test-timers-immediate.js                         | 1 -
 test/parallel/test-timers-linked-list.js                       | 1 -
 test/parallel/test-timers-now.js                               | 1 -
 test/parallel/test-timers-ordering.js                          | 1 -
 test/parallel/test-timers-uncaught-exception.js                | 1 -
 test/parallel/test-timers-unref-active.js                      | 1 -
 test/parallel/test-timers-unref-call.js                        | 1 -
 ...st-timers-unref-remove-other-unref-timers-only-one-fires.js | 1 -
 test/parallel/test-timers-unref.js                             | 1 -
 test/parallel/test-timers-zero-timeout.js                      | 1 -
 test/parallel/test-timers.js                                   | 1 -
 test/parallel/test-tty-wrap.js                                 | 1 -
 test/parallel/test-url.js                                      | 1 -
 test/parallel/test-utf8-scripts.js                             | 1 -
 test/parallel/test-util-format.js                              | 1 -
 test/parallel/test-util-inspect.js                             | 1 -
 test/parallel/test-util.js                                     | 1 -
 test/parallel/test-v8-flag-type-check.js                       | 1 -
 test/parallel/test-v8-flags.js                                 | 1 -
 test/parallel/test-v8-stats.js                                 | 1 -
 test/parallel/test-vm-basic.js                                 | 1 -
 test/parallel/test-vm-context-async-script.js                  | 1 -
 test/parallel/test-vm-context-property-forwarding.js           | 1 -
 test/parallel/test-vm-context.js                               | 1 -
 test/parallel/test-vm-create-and-run-in-context.js             | 1 -
 test/parallel/test-vm-create-context-accessors.js              | 1 -
 test/parallel/test-vm-create-context-arg.js                    | 1 -
 test/parallel/test-vm-create-context-circular-reference.js     | 1 -
 test/parallel/test-vm-cross-context.js                         | 1 -
 test/parallel/test-vm-function-declaration.js                  | 1 -
 test/parallel/test-vm-global-define-property.js                | 1 -
 test/parallel/test-vm-global-identity.js                       | 1 -
 test/parallel/test-vm-harmony-proxies.js                       | 1 -
 test/parallel/test-vm-harmony-symbols.js                       | 1 -
 test/parallel/test-vm-is-context.js                            | 1 -
 test/parallel/test-vm-preserves-property.js                    | 1 -
 test/parallel/test-vm-symbols.js                               | 1 -
 test/parallel/test-vm-syntax-error-message.js                  | 1 -
 test/parallel/test-vm-timeout.js                               | 1 -
 test/parallel/test-writedouble.js                              | 1 -
 test/parallel/test-writefloat.js                               | 1 -
 test/parallel/test-writeint.js                                 | 1 -
 test/parallel/test-writeuint.js                                | 1 -
 test/parallel/test-zlib-close-after-write.js                   | 1 -
 test/parallel/test-zlib-const.js                               | 1 -
 test/parallel/test-zlib-convenience-methods.js                 | 1 -
 test/parallel/test-zlib-dictionary.js                          | 1 -
 test/parallel/test-zlib-from-string.js                         | 1 -
 test/parallel/test-zlib-invalid-input.js                       | 3 +--
 test/parallel/test-zlib-write-after-close.js                   | 1 -
 test/parallel/test-zlib-write-after-flush.js                   | 1 -
 test/parallel/test-zlib-zero-byte.js                           | 1 -
 test/pummel/test-crypto-dh.js                                  | 1 -
 test/pummel/test-dtrace-jsstack.js                             | 1 -
 test/pummel/test-next-tick-infinite-calls.js                   | 1 -
 test/pummel/test-process-hrtime.js                             | 1 -
 test/pummel/test-process-uptime.js                             | 1 -
 test/pummel/test-stream-pipe-multi.js                          | 1 -
 test/pummel/test-stream2-basic.js                              | 1 -
 test/pummel/test-timer-wrap.js                                 | 1 -
 test/pummel/test-timer-wrap2.js                                | 1 -
 test/pummel/test-timers.js                                     | 1 -
 test/pummel/test-vm-memleak.js                                 | 1 -
 test/sequential/test-debug-args.js                             | 1 -
 test/sequential/test-deprecation-flags.js                      | 1 -
 test/sequential/test-net-listen-exclusive-random-ports.js      | 1 -
 test/sequential/test-regress-GH-1726.js                        | 1 -
 test/sequential/test-regress-GH-819.js                         | 1 -
 test/sequential/test-setproctitle.js                           | 1 -
 test/sequential/test-sigint-infinite-loop.js                   | 1 -
 test/sequential/test-stdin-child-proc.js                       | 1 -
 test/sequential/test-stdin-pipe-resume.js                      | 1 -
 test/sequential/test-stdin-script-child.js                     | 1 -
 .../test-stdout-cannot-be-closed-child-process-pipe.js         | 1 -
 test/sequential/test-stdout-stderr-reading.js                  | 1 -
 test/sequential/test-stream2-stderr-sync.js                    | 1 -
 test/sequential/test-sync-fileread.js                          | 1 -
 test/sequential/test-util-debug.js                             | 1 -
 test/timers/test-timers-reliability.js                         | 2 --
 311 files changed, 13 insertions(+), 320 deletions(-)

diff --git a/test/internet/test-dns-txt-sigsegv.js b/test/internet/test-dns-txt-sigsegv.js
index eba5c66c4649..ce2e104ba0e3 100644
--- a/test/internet/test-dns-txt-sigsegv.js
+++ b/test/internet/test-dns-txt-sigsegv.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var dns = require('dns');
 
diff --git a/test/internet/test-http-dns-fail.js b/test/internet/test-http-dns-fail.js
index 151597de14cb..77bd2d36defa 100644
--- a/test/internet/test-http-dns-fail.js
+++ b/test/internet/test-http-dns-fail.js
@@ -4,7 +4,6 @@
  * should trigger the error event after each attempt.
  */
 
-var common = require('../common');
 var assert = require('assert');
 var http = require('http');
 
diff --git a/test/internet/test-net-connect-timeout.js b/test/internet/test-net-connect-timeout.js
index b92d23485296..f3606b0a4e88 100644
--- a/test/internet/test-net-connect-timeout.js
+++ b/test/internet/test-net-connect-timeout.js
@@ -3,7 +3,6 @@
 // https://groups.google.com/forum/#!topic/nodejs/UE0ZbfLt6t8
 // https://groups.google.com/forum/#!topic/nodejs-dev/jR7-5UDqXkw
 
-var common = require('../common');
 var net = require('net');
 var assert = require('assert');
 
diff --git a/test/internet/test-net-connect-unref.js b/test/internet/test-net-connect-unref.js
index a712490d31f5..ec7077c5160a 100644
--- a/test/internet/test-net-connect-unref.js
+++ b/test/internet/test-net-connect-unref.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var net = require('net');
 
diff --git a/test/message/2100bytes.js b/test/message/2100bytes.js
index b05f5e9e1d71..4b56f64cb085 100644
--- a/test/message/2100bytes.js
+++ b/test/message/2100bytes.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var util = require('util');
 
diff --git a/test/message/error_exit.js b/test/message/error_exit.js
index 7805fd219353..e00ff6b71ccd 100644
--- a/test/message/error_exit.js
+++ b/test/message/error_exit.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 process.on('exit', function(code) {
diff --git a/test/message/eval_messages.js b/test/message/eval_messages.js
index 0b17bf5f97ae..a1a54bb5136a 100644
--- a/test/message/eval_messages.js
+++ b/test/message/eval_messages.js
@@ -1,6 +1,5 @@
 'use strict';
 
-var common = require('../common');
 var assert = require('assert');
 
 var spawn = require('child_process').spawn;
diff --git a/test/message/hello_world.js b/test/message/hello_world.js
index 1e6b030393c6..f847a641f957 100644
--- a/test/message/hello_world.js
+++ b/test/message/hello_world.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 console.log('hello world');
diff --git a/test/message/max_tick_depth.js b/test/message/max_tick_depth.js
index cacd79581060..c2745e0660c7 100644
--- a/test/message/max_tick_depth.js
+++ b/test/message/max_tick_depth.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 
 process.maxTickDepth = 10;
 var i = 20;
diff --git a/test/message/nexttick_throw.js b/test/message/nexttick_throw.js
index 3c0e2d8e379f..656b6b253816 100644
--- a/test/message/nexttick_throw.js
+++ b/test/message/nexttick_throw.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 process.nextTick(function() {
diff --git a/test/message/stack_overflow.js b/test/message/stack_overflow.js
index 7d1033c3ab2b..72e378ad059d 100644
--- a/test/message/stack_overflow.js
+++ b/test/message/stack_overflow.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 Error.stackTraceLimit = 0;
diff --git a/test/message/stdin_messages.js b/test/message/stdin_messages.js
index e99c08553a91..aba721d6bebc 100644
--- a/test/message/stdin_messages.js
+++ b/test/message/stdin_messages.js
@@ -1,6 +1,5 @@
 'use strict';
 
-var common = require('../common');
 var assert = require('assert');
 
 var spawn = require('child_process').spawn;
diff --git a/test/message/throw_custom_error.js b/test/message/throw_custom_error.js
index bb5dae05a9b0..c6e1013e4e99 100644
--- a/test/message/throw_custom_error.js
+++ b/test/message/throw_custom_error.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // custom error throwing
diff --git a/test/message/throw_custom_error.out b/test/message/throw_custom_error.out
index ef73c52c889d..401581f31d5c 100644
--- a/test/message/throw_custom_error.out
+++ b/test/message/throw_custom_error.out
@@ -1,4 +1,4 @@
-*test*message*throw_custom_error.js:6
+*test*message*throw_custom_error.js:5
 throw ({ name: 'MyCustomError', message: 'This is a custom message' });
 ^
 MyCustomError: This is a custom message
diff --git a/test/message/throw_in_line_with_tabs.js b/test/message/throw_in_line_with_tabs.js
index 50c69ca68101..ba1db3708407 100644
--- a/test/message/throw_in_line_with_tabs.js
+++ b/test/message/throw_in_line_with_tabs.js
@@ -1,6 +1,5 @@
 /* eslint-disable indent */
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 console.error('before');
diff --git a/test/message/throw_in_line_with_tabs.out b/test/message/throw_in_line_with_tabs.out
index e83b05768433..d245cca4941a 100644
--- a/test/message/throw_in_line_with_tabs.out
+++ b/test/message/throw_in_line_with_tabs.out
@@ -1,5 +1,5 @@
 before
-*test*message*throw_in_line_with_tabs.js:10
+*test*message*throw_in_line_with_tabs.js:9
 	throw ({ foo: 'bar' });
 	^
 [object Object]
diff --git a/test/message/throw_non_error.js b/test/message/throw_non_error.js
index a1046b725e93..eeb722dd57b9 100644
--- a/test/message/throw_non_error.js
+++ b/test/message/throw_non_error.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // custom error throwing
diff --git a/test/message/throw_non_error.out b/test/message/throw_non_error.out
index 15f95fcc1169..b98edc46ae2a 100644
--- a/test/message/throw_non_error.out
+++ b/test/message/throw_non_error.out
@@ -1,4 +1,4 @@
-*test*message*throw_non_error.js:6
+*test*message*throw_non_error.js:5
 throw ({ foo: 'bar' });
 ^
 [object Object]
diff --git a/test/message/throw_null.js b/test/message/throw_null.js
index ab8fb565a61e..cd014a1ce04a 100644
--- a/test/message/throw_null.js
+++ b/test/message/throw_null.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 throw null;
diff --git a/test/message/throw_null.out b/test/message/throw_null.out
index eb3eeb1294e7..5d2c677240d1 100644
--- a/test/message/throw_null.out
+++ b/test/message/throw_null.out
@@ -1,5 +1,5 @@
 
-*test*message*throw_null.js:5
+*test*message*throw_null.js:4
 throw null;
 ^
 null
diff --git a/test/message/throw_undefined.js b/test/message/throw_undefined.js
index f855cdd2f7da..36a468ddc852 100644
--- a/test/message/throw_undefined.js
+++ b/test/message/throw_undefined.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 throw undefined;
diff --git a/test/message/throw_undefined.out b/test/message/throw_undefined.out
index c23dac051fa5..32a71f0486e4 100644
--- a/test/message/throw_undefined.out
+++ b/test/message/throw_undefined.out
@@ -1,5 +1,5 @@
 
-*test*message*throw_undefined.js:5
+*test*message*throw_undefined.js:4
 throw undefined;
 ^
 undefined
diff --git a/test/message/timeout_throw.js b/test/message/timeout_throw.js
index aaf3fbc8d2f4..b20b1a3e844d 100644
--- a/test/message/timeout_throw.js
+++ b/test/message/timeout_throw.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 setTimeout(function() {
diff --git a/test/message/undefined_reference_in_new_context.js b/test/message/undefined_reference_in_new_context.js
index 7256c0d8e360..97e5334dfeb8 100644
--- a/test/message/undefined_reference_in_new_context.js
+++ b/test/message/undefined_reference_in_new_context.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/message/vm_display_runtime_error.js b/test/message/vm_display_runtime_error.js
index d01ab0b540b3..44089c984749 100644
--- a/test/message/vm_display_runtime_error.js
+++ b/test/message/vm_display_runtime_error.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/message/vm_display_syntax_error.js b/test/message/vm_display_syntax_error.js
index 179263478b84..670c7c70d83e 100644
--- a/test/message/vm_display_syntax_error.js
+++ b/test/message/vm_display_syntax_error.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/message/vm_dont_display_runtime_error.js b/test/message/vm_dont_display_runtime_error.js
index 6b4c824cbe5e..5febcdd0b279 100644
--- a/test/message/vm_dont_display_runtime_error.js
+++ b/test/message/vm_dont_display_runtime_error.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/message/vm_dont_display_syntax_error.js b/test/message/vm_dont_display_syntax_error.js
index 42b1ab14cba7..c760de692771 100644
--- a/test/message/vm_dont_display_syntax_error.js
+++ b/test/message/vm_dont_display_syntax_error.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-buffer-arraybuffer.js b/test/parallel/test-buffer-arraybuffer.js
index c13d0ba4118a..57203ac27862 100644
--- a/test/parallel/test-buffer-arraybuffer.js
+++ b/test/parallel/test-buffer-arraybuffer.js
@@ -1,6 +1,5 @@
 'use strict';
 
-const common = require('../common');
 const assert = require('assert');
 
 const Buffer = require('buffer').Buffer;
diff --git a/test/parallel/test-buffer-ascii.js b/test/parallel/test-buffer-ascii.js
index efc3a72c6625..719c4ebcf465 100644
--- a/test/parallel/test-buffer-ascii.js
+++ b/test/parallel/test-buffer-ascii.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // ASCII conversion in node.js simply masks off the high bits,
diff --git a/test/parallel/test-buffer-bytelength.js b/test/parallel/test-buffer-bytelength.js
index c136c62808e8..57df0a54a491 100644
--- a/test/parallel/test-buffer-bytelength.js
+++ b/test/parallel/test-buffer-bytelength.js
@@ -1,6 +1,5 @@
 'use strict';
 
-var common = require('../common');
 var assert = require('assert');
 var Buffer = require('buffer').Buffer;
 
diff --git a/test/parallel/test-buffer-concat.js b/test/parallel/test-buffer-concat.js
index 8d0c0eebbd14..c731b13e84f6 100644
--- a/test/parallel/test-buffer-concat.js
+++ b/test/parallel/test-buffer-concat.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var zero = [];
diff --git a/test/parallel/test-buffer-fakes.js b/test/parallel/test-buffer-fakes.js
index d473d16e9215..476206b703a3 100644
--- a/test/parallel/test-buffer-fakes.js
+++ b/test/parallel/test-buffer-fakes.js
@@ -1,6 +1,5 @@
 'use strict';
 
-const common = require('../common');
 const assert = require('assert');
 const Buffer = require('buffer').Buffer;
 const Bp = Buffer.prototype;
diff --git a/test/parallel/test-buffer-indexof.js b/test/parallel/test-buffer-indexof.js
index 7ffbae525f89..b65fcb40c1a4 100644
--- a/test/parallel/test-buffer-indexof.js
+++ b/test/parallel/test-buffer-indexof.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Buffer = require('buffer').Buffer;
diff --git a/test/parallel/test-buffer-inspect.js b/test/parallel/test-buffer-inspect.js
index 35da378631ae..b1dfec9e9de1 100644
--- a/test/parallel/test-buffer-inspect.js
+++ b/test/parallel/test-buffer-inspect.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var util = require('util');
diff --git a/test/parallel/test-buffer-iterator.js b/test/parallel/test-buffer-iterator.js
index 05371d6d793f..7c8334f9cb40 100644
--- a/test/parallel/test-buffer-iterator.js
+++ b/test/parallel/test-buffer-iterator.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var buffer = new Buffer([1, 2, 3, 4, 5]);
diff --git a/test/parallel/test-buffer-slow.js b/test/parallel/test-buffer-slow.js
index e652a6a0f959..83f266c393f6 100644
--- a/test/parallel/test-buffer-slow.js
+++ b/test/parallel/test-buffer-slow.js
@@ -1,6 +1,5 @@
 'use strict';
 
-const common = require('../common');
 const assert = require('assert');
 const buffer = require('buffer');
 const Buffer = buffer.Buffer;
diff --git a/test/parallel/test-child-process-constructor.js b/test/parallel/test-child-process-constructor.js
index 89db9cf81fdd..61e85bfe29ee 100644
--- a/test/parallel/test-child-process-constructor.js
+++ b/test/parallel/test-child-process-constructor.js
@@ -1,7 +1,6 @@
 'use strict';
 
 var assert = require('assert');
-var common = require('../common');
 var child_process = require('child_process');
 var ChildProcess = child_process.ChildProcess;
 assert.equal(typeof ChildProcess, 'function');
diff --git a/test/parallel/test-child-process-detached.js b/test/parallel/test-child-process-detached.js
index 25b811a8caa9..1e854dcc6131 100644
--- a/test/parallel/test-child-process-detached.js
+++ b/test/parallel/test-child-process-detached.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var path = require('path');
 
diff --git a/test/parallel/test-child-process-fork-and-spawn.js b/test/parallel/test-child-process-fork-and-spawn.js
index d5255bf83ca8..0acaaf28d3c6 100644
--- a/test/parallel/test-child-process-fork-and-spawn.js
+++ b/test/parallel/test-child-process-fork-and-spawn.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var spawn = require('child_process').spawn;
 var fork = require('child_process').fork;
diff --git a/test/parallel/test-child-process-fork-ref.js b/test/parallel/test-child-process-fork-ref.js
index b4066641bae9..79973666dbac 100644
--- a/test/parallel/test-child-process-fork-ref.js
+++ b/test/parallel/test-child-process-fork-ref.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var fork = require('child_process').fork;
 
diff --git a/test/parallel/test-child-process-fork-ref2.js b/test/parallel/test-child-process-fork-ref2.js
index 8bc7e4c35541..fc551f4e5631 100644
--- a/test/parallel/test-child-process-fork-ref2.js
+++ b/test/parallel/test-child-process-fork-ref2.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var fork = require('child_process').fork;
 
diff --git a/test/parallel/test-child-process-internal.js b/test/parallel/test-child-process-internal.js
index c39dc93293aa..c70cbd05d9f8 100644
--- a/test/parallel/test-child-process-internal.js
+++ b/test/parallel/test-child-process-internal.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 //messages
diff --git a/test/parallel/test-child-process-set-blocking.js b/test/parallel/test-child-process-set-blocking.js
index 3f09388265b8..480dff7114b5 100644
--- a/test/parallel/test-child-process-set-blocking.js
+++ b/test/parallel/test-child-process-set-blocking.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var ch = require('child_process');
 
diff --git a/test/parallel/test-child-process-silent.js b/test/parallel/test-child-process-silent.js
index 3714d3758d0f..02ef72b0de38 100644
--- a/test/parallel/test-child-process-silent.js
+++ b/test/parallel/test-child-process-silent.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var childProcess = require('child_process');
 
diff --git a/test/parallel/test-child-process-spawnsync-env.js b/test/parallel/test-child-process-spawnsync-env.js
index bc7c5aa3dd6c..d4d7b4dfdc95 100644
--- a/test/parallel/test-child-process-spawnsync-env.js
+++ b/test/parallel/test-child-process-spawnsync-env.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var cp = require('child_process');
 
diff --git a/test/parallel/test-child-process-spawnsync-timeout.js b/test/parallel/test-child-process-spawnsync-timeout.js
index 34c69a1fc597..8cf0758cb42f 100644
--- a/test/parallel/test-child-process-spawnsync-timeout.js
+++ b/test/parallel/test-child-process-spawnsync-timeout.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var spawnSync = require('child_process').spawnSync;
diff --git a/test/parallel/test-child-process-stdin-ipc.js b/test/parallel/test-child-process-stdin-ipc.js
index d2347849dd5b..6fc82957e773 100644
--- a/test/parallel/test-child-process-stdin-ipc.js
+++ b/test/parallel/test-child-process-stdin-ipc.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var spawn = require('child_process').spawn;
diff --git a/test/parallel/test-child-process-stdio-big-write-end.js b/test/parallel/test-child-process-stdio-big-write-end.js
index 5ae85acc54d9..0bce30272d1b 100644
--- a/test/parallel/test-child-process-stdio-big-write-end.js
+++ b/test/parallel/test-child-process-stdio-big-write-end.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var BUFSIZE = 1024;
 
diff --git a/test/parallel/test-child-process-validate-stdio.js b/test/parallel/test-child-process-validate-stdio.js
index 289323002da4..15fddcc36429 100644
--- a/test/parallel/test-child-process-validate-stdio.js
+++ b/test/parallel/test-child-process-validate-stdio.js
@@ -2,7 +2,6 @@
 // Flags: --expose_internals
 
 var assert = require('assert');
-var common = require('../common');
 var _validateStdio = require('internal/child_process')._validateStdio;
 
 // should throw if string and not ignore, pipe, or inherit
diff --git a/test/parallel/test-cli-eval.js b/test/parallel/test-cli-eval.js
index 10a77c4a67b8..a97fa0b0ce81 100644
--- a/test/parallel/test-cli-eval.js
+++ b/test/parallel/test-cli-eval.js
@@ -5,8 +5,7 @@ if (module.parent) {
   process.exit(42);
 }
 
-var common = require('../common'),
-    assert = require('assert'),
+var assert = require('assert'),
     child = require('child_process'),
     nodejs = '"' + process.execPath + '"';
 
diff --git a/test/parallel/test-cluster-debug-port.js b/test/parallel/test-cluster-debug-port.js
index d18c5ccd2786..8b54a36c663f 100644
--- a/test/parallel/test-cluster-debug-port.js
+++ b/test/parallel/test-cluster-debug-port.js
@@ -1,5 +1,4 @@
 'use strict';
-const common = require('../common');
 const assert = require('assert');
 const cluster = require('cluster');
 
diff --git a/test/parallel/test-cluster-fork-env.js b/test/parallel/test-cluster-fork-env.js
index 7749e42f608c..784017b51875 100644
--- a/test/parallel/test-cluster-fork-env.js
+++ b/test/parallel/test-cluster-fork-env.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 
diff --git a/test/parallel/test-cluster-net-listen.js b/test/parallel/test-cluster-net-listen.js
index 741cacc75897..44c35c85e6e4 100644
--- a/test/parallel/test-cluster-net-listen.js
+++ b/test/parallel/test-cluster-net-listen.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 var net = require('net');
diff --git a/test/parallel/test-cluster-setup-master-argv.js b/test/parallel/test-cluster-setup-master-argv.js
index b406c76cbbfe..9b2c50a5afb4 100644
--- a/test/parallel/test-cluster-setup-master-argv.js
+++ b/test/parallel/test-cluster-setup-master-argv.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 
diff --git a/test/parallel/test-cluster-setup-master-cumulative.js b/test/parallel/test-cluster-setup-master-cumulative.js
index 0376546d286b..c71eb36b8aaa 100644
--- a/test/parallel/test-cluster-setup-master-cumulative.js
+++ b/test/parallel/test-cluster-setup-master-cumulative.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 
diff --git a/test/parallel/test-cluster-setup-master-emit.js b/test/parallel/test-cluster-setup-master-emit.js
index 8b463ec97bff..dd5422ee57ce 100644
--- a/test/parallel/test-cluster-setup-master-emit.js
+++ b/test/parallel/test-cluster-setup-master-emit.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 
diff --git a/test/parallel/test-cluster-setup-master-multiple.js b/test/parallel/test-cluster-setup-master-multiple.js
index 8ee6d091cd52..7c68cb81f60b 100644
--- a/test/parallel/test-cluster-setup-master-multiple.js
+++ b/test/parallel/test-cluster-setup-master-multiple.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 
diff --git a/test/parallel/test-cluster-setup-master.js b/test/parallel/test-cluster-setup-master.js
index c32b3ea6d3b1..6661e169722f 100644
--- a/test/parallel/test-cluster-setup-master.js
+++ b/test/parallel/test-cluster-setup-master.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 
diff --git a/test/parallel/test-cluster-uncaught-exception.js b/test/parallel/test-cluster-uncaught-exception.js
index ec42773ef558..0e61f9cf3bc2 100644
--- a/test/parallel/test-cluster-uncaught-exception.js
+++ b/test/parallel/test-cluster-uncaught-exception.js
@@ -3,7 +3,6 @@
 // one that the cluster module installs.
 // https://github.com/joyent/node/issues/2556
 
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 var fork = require('child_process').fork;
diff --git a/test/parallel/test-cluster-worker-constructor.js b/test/parallel/test-cluster-worker-constructor.js
index e29dc0156190..653719390558 100644
--- a/test/parallel/test-cluster-worker-constructor.js
+++ b/test/parallel/test-cluster-worker-constructor.js
@@ -2,7 +2,6 @@
 // test-cluster-worker-constructor.js
 // validates correct behavior of the cluster.Worker constructor
 
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 var worker;
diff --git a/test/parallel/test-cluster-worker-death.js b/test/parallel/test-cluster-worker-death.js
index 88a0f887cc2c..2ac83f4b95a3 100644
--- a/test/parallel/test-cluster-worker-death.js
+++ b/test/parallel/test-cluster-worker-death.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 
diff --git a/test/parallel/test-cluster-worker-init.js b/test/parallel/test-cluster-worker-init.js
index 38886af5279a..bbce309fab68 100644
--- a/test/parallel/test-cluster-worker-init.js
+++ b/test/parallel/test-cluster-worker-init.js
@@ -3,7 +3,6 @@
 // verifies that, when a child process is forked, the cluster.worker
 // object can receive messages as expected
 
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 var msg = 'foo';
diff --git a/test/parallel/test-console-instance.js b/test/parallel/test-console-instance.js
index a80c6e57e4b1..fe325645b536 100644
--- a/test/parallel/test-console-instance.js
+++ b/test/parallel/test-console-instance.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var Stream = require('stream');
 var Console = require('console').Console;
diff --git a/test/parallel/test-console-not-call-toString.js b/test/parallel/test-console-not-call-toString.js
index 7846dbf2778b..12a2a04caf7e 100644
--- a/test/parallel/test-console-not-call-toString.js
+++ b/test/parallel/test-console-not-call-toString.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var func = function() {};
diff --git a/test/parallel/test-console.js b/test/parallel/test-console.js
index 982c83851f07..7a4bea0c6fb1 100644
--- a/test/parallel/test-console.js
+++ b/test/parallel/test-console.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 assert.ok(process.stdout.writable);
diff --git a/test/parallel/test-delayed-require.js b/test/parallel/test-delayed-require.js
index 5fa82f236c1d..515bc1fe56b6 100644
--- a/test/parallel/test-delayed-require.js
+++ b/test/parallel/test-delayed-require.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var a;
diff --git a/test/parallel/test-dgram-bind.js b/test/parallel/test-dgram-bind.js
index 6d35534cb5eb..79ff97235389 100644
--- a/test/parallel/test-dgram-bind.js
+++ b/test/parallel/test-dgram-bind.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var dgram = require('dgram');
 
diff --git a/test/parallel/test-dgram-bytes-length.js b/test/parallel/test-dgram-bytes-length.js
index 9f8c39eb04da..7cf138490456 100644
--- a/test/parallel/test-dgram-bytes-length.js
+++ b/test/parallel/test-dgram-bytes-length.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var dgram = require('dgram');
 
diff --git a/test/parallel/test-dgram-listen-after-bind.js b/test/parallel/test-dgram-listen-after-bind.js
index 2aac7ae9cf75..85cef2099409 100644
--- a/test/parallel/test-dgram-listen-after-bind.js
+++ b/test/parallel/test-dgram-listen-after-bind.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var dgram = require('dgram');
 
diff --git a/test/parallel/test-dgram-ref.js b/test/parallel/test-dgram-ref.js
index d689a45e36df..5883d6252c6f 100644
--- a/test/parallel/test-dgram-ref.js
+++ b/test/parallel/test-dgram-ref.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var dgram = require('dgram');
 
 // should not hang, see #1282
diff --git a/test/parallel/test-dgram-regress-4496.js b/test/parallel/test-dgram-regress-4496.js
index fcb8d026bc54..a37c075e2ecf 100644
--- a/test/parallel/test-dgram-regress-4496.js
+++ b/test/parallel/test-dgram-regress-4496.js
@@ -1,7 +1,6 @@
 'use strict';
 // Remove this test once we support sending strings.
 
-var common = require('../common');
 var assert = require('assert');
 var dgram = require('dgram');
 
diff --git a/test/parallel/test-dgram-send-bad-arguments.js b/test/parallel/test-dgram-send-bad-arguments.js
index ccd10e005553..ce98b318066f 100644
--- a/test/parallel/test-dgram-send-bad-arguments.js
+++ b/test/parallel/test-dgram-send-bad-arguments.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var dgram = require('dgram');
 
diff --git a/test/parallel/test-dgram-unref.js b/test/parallel/test-dgram-unref.js
index 2add3d28c497..2a2659834e48 100644
--- a/test/parallel/test-dgram-unref.js
+++ b/test/parallel/test-dgram-unref.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var dgram = require('dgram');
diff --git a/test/parallel/test-dh-padding.js b/test/parallel/test-dh-padding.js
index ef6ea0fd4d7c..c1e4f3042493 100644
--- a/test/parallel/test-dh-padding.js
+++ b/test/parallel/test-dh-padding.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 try {
diff --git a/test/parallel/test-dns-cares-domains.js b/test/parallel/test-dns-cares-domains.js
index cb651c5f5afb..7adcb4d3ea0c 100644
--- a/test/parallel/test-dns-cares-domains.js
+++ b/test/parallel/test-dns-cares-domains.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var dns = require('dns');
 var domain = require('domain');
diff --git a/test/parallel/test-dns-lookup-cb-error.js b/test/parallel/test-dns-lookup-cb-error.js
index 330dfb5d5709..786bf40bbaf5 100644
--- a/test/parallel/test-dns-lookup-cb-error.js
+++ b/test/parallel/test-dns-lookup-cb-error.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var cares = process.binding('cares_wrap');
 
diff --git a/test/parallel/test-dns-regress-7070.js b/test/parallel/test-dns-regress-7070.js
index 1fbd7f07a9d5..d6c8490009cd 100644
--- a/test/parallel/test-dns-regress-7070.js
+++ b/test/parallel/test-dns-regress-7070.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var dns = require('dns');
 
diff --git a/test/parallel/test-dns.js b/test/parallel/test-dns.js
index abc7edbf5980..29b588230e49 100644
--- a/test/parallel/test-dns.js
+++ b/test/parallel/test-dns.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var dns = require('dns');
diff --git a/test/parallel/test-domain-exit-dispose-again.js b/test/parallel/test-domain-exit-dispose-again.js
index d7046481d112..2532ab4473f0 100644
--- a/test/parallel/test-domain-exit-dispose-again.js
+++ b/test/parallel/test-domain-exit-dispose-again.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var domain = require('domain');
 var disposalFailed = false;
diff --git a/test/parallel/test-domain-exit-dispose.js b/test/parallel/test-domain-exit-dispose.js
index 90e7210ce21a..6a71098d09a6 100644
--- a/test/parallel/test-domain-exit-dispose.js
+++ b/test/parallel/test-domain-exit-dispose.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var domain = require('domain');
 var disposalFailed = false;
diff --git a/test/parallel/test-domain-from-timer.js b/test/parallel/test-domain-from-timer.js
index 93661b419b0b..ad224dc0774b 100644
--- a/test/parallel/test-domain-from-timer.js
+++ b/test/parallel/test-domain-from-timer.js
@@ -1,7 +1,6 @@
 'use strict';
 // Simple tests of most basic domain functionality.
 
-var common = require('../common');
 var assert = require('assert');
 
 // timeouts call the callback directly from cc, so need to make sure the
diff --git a/test/parallel/test-domain-implicit-fs.js b/test/parallel/test-domain-implicit-fs.js
index fd21dcafe085..3a9e44faf50d 100644
--- a/test/parallel/test-domain-implicit-fs.js
+++ b/test/parallel/test-domain-implicit-fs.js
@@ -1,7 +1,6 @@
 'use strict';
 // Simple tests of most basic domain functionality.
 
-var common = require('../common');
 var assert = require('assert');
 var domain = require('domain');
 var events = require('events');
diff --git a/test/parallel/test-domain-nested-throw.js b/test/parallel/test-domain-nested-throw.js
index 0fba3001b543..da9388871a4a 100644
--- a/test/parallel/test-domain-nested-throw.js
+++ b/test/parallel/test-domain-nested-throw.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var domain = require('domain');
diff --git a/test/parallel/test-domain-stack.js b/test/parallel/test-domain-stack.js
index f9b5648a6619..7b2bb7d39588 100644
--- a/test/parallel/test-domain-stack.js
+++ b/test/parallel/test-domain-stack.js
@@ -1,7 +1,6 @@
 'use strict';
 // Make sure that the domain stack doesn't get out of hand.
 
-var common = require('../common');
 var assert = require('assert');
 var domain = require('domain');
 var events = require('events');
diff --git a/test/parallel/test-domain-timers.js b/test/parallel/test-domain-timers.js
index 7530c9edba40..ff391e51056a 100644
--- a/test/parallel/test-domain-timers.js
+++ b/test/parallel/test-domain-timers.js
@@ -1,7 +1,6 @@
 'use strict';
 var domain = require('domain');
 var assert = require('assert');
-var common = require('../common');
 
 var timeout_err, timeout, immediate_err;
 
diff --git a/test/parallel/test-domain.js b/test/parallel/test-domain.js
index 918e3288e8dc..85b544d199f0 100644
--- a/test/parallel/test-domain.js
+++ b/test/parallel/test-domain.js
@@ -1,7 +1,6 @@
 'use strict';
 // Simple tests of most basic domain functionality.
 
-var common = require('../common');
 var assert = require('assert');
 var domain = require('domain');
 var events = require('events');
diff --git a/test/parallel/test-event-emitter-add-listeners.js b/test/parallel/test-event-emitter-add-listeners.js
index cc30fd24add3..fff1f95fa82a 100644
--- a/test/parallel/test-event-emitter-add-listeners.js
+++ b/test/parallel/test-event-emitter-add-listeners.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 
diff --git a/test/parallel/test-event-emitter-check-listener-leaks.js b/test/parallel/test-event-emitter-check-listener-leaks.js
index 90f686b5422c..dbf8394c7e94 100644
--- a/test/parallel/test-event-emitter-check-listener-leaks.js
+++ b/test/parallel/test-event-emitter-check-listener-leaks.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 
diff --git a/test/parallel/test-event-emitter-get-max-listeners.js b/test/parallel/test-event-emitter-get-max-listeners.js
index 43a14db0cca3..33dbd62a546c 100644
--- a/test/parallel/test-event-emitter-get-max-listeners.js
+++ b/test/parallel/test-event-emitter-get-max-listeners.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var EventEmitter = require('events');
 
diff --git a/test/parallel/test-event-emitter-listener-count.js b/test/parallel/test-event-emitter-listener-count.js
index c5b75c819d17..e53b8991f1fc 100644
--- a/test/parallel/test-event-emitter-listener-count.js
+++ b/test/parallel/test-event-emitter-listener-count.js
@@ -1,6 +1,5 @@
 'use strict';
 
-const common = require('../common');
 const assert = require('assert');
 const EventEmitter = require('events');
 
diff --git a/test/parallel/test-event-emitter-listeners-side-effects.js b/test/parallel/test-event-emitter-listeners-side-effects.js
index 23076128eddf..2649af75144f 100644
--- a/test/parallel/test-event-emitter-listeners-side-effects.js
+++ b/test/parallel/test-event-emitter-listeners-side-effects.js
@@ -1,6 +1,5 @@
 'use strict';
 
-var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 
diff --git a/test/parallel/test-event-emitter-listeners.js b/test/parallel/test-event-emitter-listeners.js
index 48a60609e7be..201518156b35 100644
--- a/test/parallel/test-event-emitter-listeners.js
+++ b/test/parallel/test-event-emitter-listeners.js
@@ -1,6 +1,5 @@
 'use strict';
 
-var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 
diff --git a/test/parallel/test-event-emitter-max-listeners.js b/test/parallel/test-event-emitter-max-listeners.js
index 5e754698d0a0..4722d7f7d1fe 100644
--- a/test/parallel/test-event-emitter-max-listeners.js
+++ b/test/parallel/test-event-emitter-max-listeners.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 
diff --git a/test/parallel/test-event-emitter-method-names.js b/test/parallel/test-event-emitter-method-names.js
index a260aa779855..7fe24a3ddbac 100644
--- a/test/parallel/test-event-emitter-method-names.js
+++ b/test/parallel/test-event-emitter-method-names.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 
diff --git a/test/parallel/test-event-emitter-modify-in-emit.js b/test/parallel/test-event-emitter-modify-in-emit.js
index 85845cc4443b..ce0fabf77445 100644
--- a/test/parallel/test-event-emitter-modify-in-emit.js
+++ b/test/parallel/test-event-emitter-modify-in-emit.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 
diff --git a/test/parallel/test-event-emitter-no-error-provided-to-error-event.js b/test/parallel/test-event-emitter-no-error-provided-to-error-event.js
index e85361475f89..adba3152954c 100644
--- a/test/parallel/test-event-emitter-no-error-provided-to-error-event.js
+++ b/test/parallel/test-event-emitter-no-error-provided-to-error-event.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 var domain = require('domain');
diff --git a/test/parallel/test-event-emitter-num-args.js b/test/parallel/test-event-emitter-num-args.js
index 6c403cd2f294..19feae6894c3 100644
--- a/test/parallel/test-event-emitter-num-args.js
+++ b/test/parallel/test-event-emitter-num-args.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 
diff --git a/test/parallel/test-event-emitter-once.js b/test/parallel/test-event-emitter-once.js
index 1085e7942a59..23003180fe91 100644
--- a/test/parallel/test-event-emitter-once.js
+++ b/test/parallel/test-event-emitter-once.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 
diff --git a/test/parallel/test-event-emitter-set-max-listeners-side-effects.js b/test/parallel/test-event-emitter-set-max-listeners-side-effects.js
index f09f130ab489..22a46e225715 100644
--- a/test/parallel/test-event-emitter-set-max-listeners-side-effects.js
+++ b/test/parallel/test-event-emitter-set-max-listeners-side-effects.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 
diff --git a/test/parallel/test-event-emitter-subclass.js b/test/parallel/test-event-emitter-subclass.js
index fe915be34efc..e9fe068ccab7 100644
--- a/test/parallel/test-event-emitter-subclass.js
+++ b/test/parallel/test-event-emitter-subclass.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var EventEmitter = require('events').EventEmitter;
 var util = require('util');
diff --git a/test/parallel/test-exception-handler.js b/test/parallel/test-exception-handler.js
index 9cc8106ea6f8..701184fe3f1a 100644
--- a/test/parallel/test-exception-handler.js
+++ b/test/parallel/test-exception-handler.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var MESSAGE = 'catch me if you can';
diff --git a/test/parallel/test-exception-handler2.js b/test/parallel/test-exception-handler2.js
index 58e84ad21ba4..88464e6e06fa 100644
--- a/test/parallel/test-exception-handler2.js
+++ b/test/parallel/test-exception-handler2.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 process.on('uncaughtException', function(err) {
diff --git a/test/parallel/test-exec-max-buffer.js b/test/parallel/test-exec-max-buffer.js
index 5cae35b69f95..37cbd495d545 100644
--- a/test/parallel/test-exec-max-buffer.js
+++ b/test/parallel/test-exec-max-buffer.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var exec = require('child_process').exec;
 var assert = require('assert');
 
diff --git a/test/parallel/test-fs-exists.js b/test/parallel/test-fs-exists.js
index fcbd729a5ed8..4661446fe14d 100644
--- a/test/parallel/test-fs-exists.js
+++ b/test/parallel/test-fs-exists.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var fs = require('fs');
 var f = __filename;
diff --git a/test/parallel/test-fs-make-callback.js b/test/parallel/test-fs-make-callback.js
index a15a16404df0..2700ab23898b 100644
--- a/test/parallel/test-fs-make-callback.js
+++ b/test/parallel/test-fs-make-callback.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var fs = require('fs');
 
diff --git a/test/parallel/test-fs-null-bytes.js b/test/parallel/test-fs-null-bytes.js
index 77228521e6fc..4afd4a5b9517 100644
--- a/test/parallel/test-fs-null-bytes.js
+++ b/test/parallel/test-fs-null-bytes.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var fs = require('fs');
 
diff --git a/test/parallel/test-fs-open-flags.js b/test/parallel/test-fs-open-flags.js
index c7d53117d587..50a7819c6834 100644
--- a/test/parallel/test-fs-open-flags.js
+++ b/test/parallel/test-fs-open-flags.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var constants = require('constants');
diff --git a/test/parallel/test-fs-open.js b/test/parallel/test-fs-open.js
index 59b605841b44..66eaaefb4d7a 100644
--- a/test/parallel/test-fs-open.js
+++ b/test/parallel/test-fs-open.js
@@ -1,6 +1,5 @@
 'use strict';
 var constants = require('constants');
-var common = require('../common');
 var assert = require('assert');
 var fs = require('fs');
 
diff --git a/test/parallel/test-fs-read-file-sync-hostname.js b/test/parallel/test-fs-read-file-sync-hostname.js
index c5c5264c0dde..1c68ea03d1bc 100644
--- a/test/parallel/test-fs-read-file-sync-hostname.js
+++ b/test/parallel/test-fs-read-file-sync-hostname.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var fs = require('fs');
 
diff --git a/test/parallel/test-fs-readfile-zero-byte-liar.js b/test/parallel/test-fs-readfile-zero-byte-liar.js
index 2c9c6e3db9a5..01b7d73f930a 100644
--- a/test/parallel/test-fs-readfile-zero-byte-liar.js
+++ b/test/parallel/test-fs-readfile-zero-byte-liar.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var fs = require('fs');
 
diff --git a/test/parallel/test-fs-stat.js b/test/parallel/test-fs-stat.js
index 123d6608b4bb..305b2ed14069 100644
--- a/test/parallel/test-fs-stat.js
+++ b/test/parallel/test-fs-stat.js
@@ -1,5 +1,4 @@
 /* eslint-disable strict */
-var common = require('../common');
 var assert = require('assert');
 var fs = require('fs');
 var got_error = false;
diff --git a/test/parallel/test-fs-sync-fd-leak.js b/test/parallel/test-fs-sync-fd-leak.js
index 5f2b63125a1d..c26115053ff1 100644
--- a/test/parallel/test-fs-sync-fd-leak.js
+++ b/test/parallel/test-fs-sync-fd-leak.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var fs = require('fs');
 
diff --git a/test/parallel/test-fs-write-no-fd.js b/test/parallel/test-fs-write-no-fd.js
index 5b38ce6ba814..64ad41b359f4 100644
--- a/test/parallel/test-fs-write-no-fd.js
+++ b/test/parallel/test-fs-write-no-fd.js
@@ -1,5 +1,4 @@
 'use strict';
-const common = require('../common');
 const fs = require('fs');
 const assert = require('assert');
 
diff --git a/test/parallel/test-handle-wrap-close-abort.js b/test/parallel/test-handle-wrap-close-abort.js
index 8e2388fa84d8..a9c82eee84f2 100644
--- a/test/parallel/test-handle-wrap-close-abort.js
+++ b/test/parallel/test-handle-wrap-close-abort.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 
 process.on('uncaughtException', function() { });
 
diff --git a/test/parallel/test-http-agent-false.js b/test/parallel/test-http-agent-false.js
index ad8de89f2038..f663d72c7251 100644
--- a/test/parallel/test-http-agent-false.js
+++ b/test/parallel/test-http-agent-false.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var http = require('http');
 
diff --git a/test/parallel/test-http-agent-getname.js b/test/parallel/test-http-agent-getname.js
index d8d30a8ddbc2..ec0dbdfa4b6c 100644
--- a/test/parallel/test-http-agent-getname.js
+++ b/test/parallel/test-http-agent-getname.js
@@ -2,7 +2,6 @@
 
 var assert = require('assert');
 var http = require('http');
-var common = require('../common');
 
 var agent = new http.Agent();
 
diff --git a/test/parallel/test-http-client-readable.js b/test/parallel/test-http-client-readable.js
index ba9fdd658c38..8a0b06d1daa0 100644
--- a/test/parallel/test-http-client-readable.js
+++ b/test/parallel/test-http-client-readable.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var http = require('http');
 var util = require('util');
diff --git a/test/parallel/test-http-client-unescaped-path.js b/test/parallel/test-http-client-unescaped-path.js
index 1536916ae9b4..b569eeb3e300 100644
--- a/test/parallel/test-http-client-unescaped-path.js
+++ b/test/parallel/test-http-client-unescaped-path.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var http = require('http');
 
diff --git a/test/parallel/test-http-methods.js b/test/parallel/test-http-methods.js
index 348fd2e519ef..0632a5e307bb 100644
--- a/test/parallel/test-http-methods.js
+++ b/test/parallel/test-http-methods.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var http = require('http');
 var util = require('util');
diff --git a/test/parallel/test-http-parser-bad-ref.js b/test/parallel/test-http-parser-bad-ref.js
index d409dc62d008..71709f8da6fd 100644
--- a/test/parallel/test-http-parser-bad-ref.js
+++ b/test/parallel/test-http-parser-bad-ref.js
@@ -4,7 +4,6 @@
 
 // Flags: --expose_gc
 
-var common = require('../common');
 var assert = require('assert');
 var HTTPParser = process.binding('http_parser').HTTPParser;
 
diff --git a/test/parallel/test-http-parser.js b/test/parallel/test-http-parser.js
index bb004f864cf4..09a23eefde52 100644
--- a/test/parallel/test-http-parser.js
+++ b/test/parallel/test-http-parser.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var HTTPParser = process.binding('http_parser').HTTPParser;
diff --git a/test/parallel/test-http-url.parse-only-support-http-https-protocol.js b/test/parallel/test-http-url.parse-only-support-http-https-protocol.js
index fd52a0b62d11..1f7bb8608c94 100644
--- a/test/parallel/test-http-url.parse-only-support-http-https-protocol.js
+++ b/test/parallel/test-http-url.parse-only-support-http-https-protocol.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var http = require('http');
 var url = require('url');
diff --git a/test/parallel/test-internal-modules-expose.js b/test/parallel/test-internal-modules-expose.js
index 4ece1d0c7b6f..c487eb0b9b56 100644
--- a/test/parallel/test-internal-modules-expose.js
+++ b/test/parallel/test-internal-modules-expose.js
@@ -1,7 +1,6 @@
 'use strict';
 // Flags: --expose_internals
 
-var common = require('../common');
 var assert = require('assert');
 
 assert.equal(typeof require('internal/freelist').FreeList, 'function');
diff --git a/test/parallel/test-internal-modules.js b/test/parallel/test-internal-modules.js
index 011b6f7132e9..8a038e5ac7be 100644
--- a/test/parallel/test-internal-modules.js
+++ b/test/parallel/test-internal-modules.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 assert.throws(function() {
diff --git a/test/parallel/test-intl.js b/test/parallel/test-intl.js
index 7288febf9e6b..21c638c097bf 100644
--- a/test/parallel/test-intl.js
+++ b/test/parallel/test-intl.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // does node think that i18n was enabled?
diff --git a/test/parallel/test-listen-fd-ebadf.js b/test/parallel/test-listen-fd-ebadf.js
index db905dfa35e9..7338a34e9e1a 100644
--- a/test/parallel/test-listen-fd-ebadf.js
+++ b/test/parallel/test-listen-fd-ebadf.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var net = require('net');
 
diff --git a/test/parallel/test-microtask-queue-integration-domain.js b/test/parallel/test-microtask-queue-integration-domain.js
index 7a4ad77cd321..5b9e6b2c8d2c 100644
--- a/test/parallel/test-microtask-queue-integration-domain.js
+++ b/test/parallel/test-microtask-queue-integration-domain.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var domain = require('domain');
 
diff --git a/test/parallel/test-microtask-queue-integration.js b/test/parallel/test-microtask-queue-integration.js
index 37de5ee33b14..b6ec65fb020f 100644
--- a/test/parallel/test-microtask-queue-integration.js
+++ b/test/parallel/test-microtask-queue-integration.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var implementations = [
diff --git a/test/parallel/test-microtask-queue-run-domain.js b/test/parallel/test-microtask-queue-run-domain.js
index 77534920ff14..2aa775cfa124 100644
--- a/test/parallel/test-microtask-queue-run-domain.js
+++ b/test/parallel/test-microtask-queue-run-domain.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var domain = require('domain');
 
diff --git a/test/parallel/test-microtask-queue-run-immediate-domain.js b/test/parallel/test-microtask-queue-run-immediate-domain.js
index 2dea0a76cc1b..e3bdb2bd150f 100644
--- a/test/parallel/test-microtask-queue-run-immediate-domain.js
+++ b/test/parallel/test-microtask-queue-run-immediate-domain.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var domain = require('domain');
 
diff --git a/test/parallel/test-microtask-queue-run-immediate.js b/test/parallel/test-microtask-queue-run-immediate.js
index cfd9cd3659ef..b7d28a26c8c7 100644
--- a/test/parallel/test-microtask-queue-run-immediate.js
+++ b/test/parallel/test-microtask-queue-run-immediate.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 function enqueueMicrotask(fn) {
diff --git a/test/parallel/test-microtask-queue-run.js b/test/parallel/test-microtask-queue-run.js
index ca758546c2bc..8f928ceec366 100644
--- a/test/parallel/test-microtask-queue-run.js
+++ b/test/parallel/test-microtask-queue-run.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 function enqueueMicrotask(fn) {
diff --git a/test/parallel/test-net-dns-error.js b/test/parallel/test-net-dns-error.js
index 17f251cec3b6..77963f4fb202 100644
--- a/test/parallel/test-net-dns-error.js
+++ b/test/parallel/test-net-dns-error.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var net = require('net');
diff --git a/test/parallel/test-net-end-without-connect.js b/test/parallel/test-net-end-without-connect.js
index 2911591f9f48..a3669338743b 100644
--- a/test/parallel/test-net-end-without-connect.js
+++ b/test/parallel/test-net-end-without-connect.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var net = require('net');
 
 var sock = new net.Socket();
diff --git a/test/parallel/test-net-isip.js b/test/parallel/test-net-isip.js
index 96177122b7ba..935a85670f53 100644
--- a/test/parallel/test-net-isip.js
+++ b/test/parallel/test-net-isip.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var net = require('net');
 
diff --git a/test/parallel/test-net-listen-fd0.js b/test/parallel/test-net-listen-fd0.js
index e326ac2b60be..0eb30405aef2 100644
--- a/test/parallel/test-net-listen-fd0.js
+++ b/test/parallel/test-net-listen-fd0.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var net = require('net');
 
diff --git a/test/parallel/test-net-server-connections.js b/test/parallel/test-net-server-connections.js
index 138a78defb26..b5fb2f605eef 100644
--- a/test/parallel/test-net-server-connections.js
+++ b/test/parallel/test-net-server-connections.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var net = require('net');
diff --git a/test/parallel/test-net-server-unref-persistent.js b/test/parallel/test-net-server-unref-persistent.js
index a071b625ef26..0b0a38bba35d 100644
--- a/test/parallel/test-net-server-unref-persistent.js
+++ b/test/parallel/test-net-server-unref-persistent.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var net = require('net');
 var closed = false;
diff --git a/test/parallel/test-next-tick-domain.js b/test/parallel/test-next-tick-domain.js
index 4d53bba6c4f5..bc55c6bfc238 100644
--- a/test/parallel/test-next-tick-domain.js
+++ b/test/parallel/test-next-tick-domain.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var origNextTick = process.nextTick;
diff --git a/test/parallel/test-next-tick-errors.js b/test/parallel/test-next-tick-errors.js
index eccd7a43a082..605c59950e5b 100644
--- a/test/parallel/test-next-tick-errors.js
+++ b/test/parallel/test-next-tick-errors.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var order = [],
diff --git a/test/parallel/test-next-tick-intentional-starvation.js b/test/parallel/test-next-tick-intentional-starvation.js
index d4a8a1b74813..fb6a4db44dba 100644
--- a/test/parallel/test-next-tick-intentional-starvation.js
+++ b/test/parallel/test-next-tick-intentional-starvation.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // this is the inverse of test-next-tick-starvation.
diff --git a/test/parallel/test-next-tick-ordering.js b/test/parallel/test-next-tick-ordering.js
index c2b936a1061d..781e765e01b8 100644
--- a/test/parallel/test-next-tick-ordering.js
+++ b/test/parallel/test-next-tick-ordering.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var i;
 
diff --git a/test/parallel/test-next-tick-ordering2.js b/test/parallel/test-next-tick-ordering2.js
index 4252d623679f..27998ea80621 100644
--- a/test/parallel/test-next-tick-ordering2.js
+++ b/test/parallel/test-next-tick-ordering2.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var order = [];
diff --git a/test/parallel/test-next-tick.js b/test/parallel/test-next-tick.js
index 54e7b88cf022..d812ab123517 100644
--- a/test/parallel/test-next-tick.js
+++ b/test/parallel/test-next-tick.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var complete = 0;
diff --git a/test/parallel/test-path-zero-length-strings.js b/test/parallel/test-path-zero-length-strings.js
index 083eb3e7ac03..70f147bfd286 100644
--- a/test/parallel/test-path-zero-length-strings.js
+++ b/test/parallel/test-path-zero-length-strings.js
@@ -5,7 +5,6 @@
 // directory. This test makes sure that the behaviour is intact between commits.
 // See: https://github.com/nodejs/node/pull/2106
 
-const common = require('../common');
 const assert = require('assert');
 const path = require('path');
 const pwd = process.cwd();
diff --git a/test/parallel/test-pipe-return-val.js b/test/parallel/test-pipe-return-val.js
index 718d052cd24c..3a1ff2a4c653 100644
--- a/test/parallel/test-pipe-return-val.js
+++ b/test/parallel/test-pipe-return-val.js
@@ -1,7 +1,6 @@
 'use strict';
 // This test ensures SourceStream.pipe(DestStream) returns DestStream
 
-var common = require('../common');
 var Stream = require('stream').Stream;
 var assert = require('assert');
 var util = require('util');
diff --git a/test/parallel/test-preload.js b/test/parallel/test-preload.js
index b4a3af78d8df..7bea14dd2f67 100644
--- a/test/parallel/test-preload.js
+++ b/test/parallel/test-preload.js
@@ -1,6 +1,5 @@
 'use strict';
-var common = require('../common'),
-    assert = require('assert'),
+var assert = require('assert'),
     path = require('path'),
     child_process = require('child_process');
 
diff --git a/test/parallel/test-process-before-exit.js b/test/parallel/test-process-before-exit.js
index eff96da98e47..879efbc0b792 100644
--- a/test/parallel/test-process-before-exit.js
+++ b/test/parallel/test-process-before-exit.js
@@ -1,6 +1,5 @@
 'use strict';
 var assert = require('assert');
-var common = require('../common');
 
 var N = 5;
 var n = 0;
diff --git a/test/parallel/test-process-config.js b/test/parallel/test-process-config.js
index 4fc3bcaa98af..34933596a55e 100644
--- a/test/parallel/test-process-config.js
+++ b/test/parallel/test-process-config.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var fs = require('fs');
 var path = require('path');
diff --git a/test/parallel/test-process-env.js b/test/parallel/test-process-env.js
index 7e927d09bae6..38456fc58717 100644
--- a/test/parallel/test-process-env.js
+++ b/test/parallel/test-process-env.js
@@ -4,7 +4,6 @@
 // first things first, set the timezone; see tzset(3)
 process.env.TZ = 'Europe/Amsterdam';
 
-var common = require('../common');
 var assert = require('assert');
 var spawn = require('child_process').spawn;
 
diff --git a/test/parallel/test-process-exit-code.js b/test/parallel/test-process-exit-code.js
index fea8c2d4fcdc..4e61e31c5316 100644
--- a/test/parallel/test-process-exit-code.js
+++ b/test/parallel/test-process-exit-code.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 switch (process.argv[2]) {
diff --git a/test/parallel/test-process-exit.js b/test/parallel/test-process-exit.js
index 999eefc1eff5..1eb3af12ed8f 100644
--- a/test/parallel/test-process-exit.js
+++ b/test/parallel/test-process-exit.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // calling .exit() from within "exit" should not overflow the call stack
diff --git a/test/parallel/test-process-getgroups.js b/test/parallel/test-process-getgroups.js
index b18b5a0f2f90..4b9358f93e29 100644
--- a/test/parallel/test-process-getgroups.js
+++ b/test/parallel/test-process-getgroups.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var exec = require('child_process').exec;
 
diff --git a/test/parallel/test-process-hrtime.js b/test/parallel/test-process-hrtime.js
index 0e2c5b110e92..cbe0dfda6008 100644
--- a/test/parallel/test-process-hrtime.js
+++ b/test/parallel/test-process-hrtime.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // the default behavior, return an Array "tuple" of numbers
diff --git a/test/parallel/test-process-kill-null.js b/test/parallel/test-process-kill-null.js
index 65dab752f12e..53d31ae5f536 100644
--- a/test/parallel/test-process-kill-null.js
+++ b/test/parallel/test-process-kill-null.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var spawn = require('child_process').spawn;
 
diff --git a/test/parallel/test-process-kill-pid.js b/test/parallel/test-process-kill-pid.js
index f193e979166d..c9cd9c46b313 100644
--- a/test/parallel/test-process-kill-pid.js
+++ b/test/parallel/test-process-kill-pid.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // test variants of pid
diff --git a/test/parallel/test-process-next-tick.js b/test/parallel/test-process-next-tick.js
index e7b5f8f3fe88..7536188e364e 100644
--- a/test/parallel/test-process-next-tick.js
+++ b/test/parallel/test-process-next-tick.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var N = 2;
 var tickCount = 0;
diff --git a/test/parallel/test-process-raw-debug.js b/test/parallel/test-process-raw-debug.js
index f849457d6438..a1734e08e481 100644
--- a/test/parallel/test-process-raw-debug.js
+++ b/test/parallel/test-process-raw-debug.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var os = require('os');
 
diff --git a/test/parallel/test-process-wrap.js b/test/parallel/test-process-wrap.js
index bf3dfe4e8b16..6043a5f83490 100644
--- a/test/parallel/test-process-wrap.js
+++ b/test/parallel/test-process-wrap.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var Process = process.binding('process_wrap').Process;
 var Pipe = process.binding('pipe_wrap').Pipe;
diff --git a/test/parallel/test-promises-unhandled-rejections.js b/test/parallel/test-promises-unhandled-rejections.js
index e5b3e6f35c0d..73234be0d2fd 100644
--- a/test/parallel/test-promises-unhandled-rejections.js
+++ b/test/parallel/test-promises-unhandled-rejections.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var domain = require('domain');
 
diff --git a/test/parallel/test-punycode.js b/test/parallel/test-punycode.js
index 179bca51ec2f..906e6838f914 100644
--- a/test/parallel/test-punycode.js
+++ b/test/parallel/test-punycode.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var punycode = require('punycode');
 var assert = require('assert');
 
diff --git a/test/parallel/test-querystring.js b/test/parallel/test-querystring.js
index 66497ac2d3b6..834f2d5c8d69 100644
--- a/test/parallel/test-querystring.js
+++ b/test/parallel/test-querystring.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // test using assert
diff --git a/test/parallel/test-readdouble.js b/test/parallel/test-readdouble.js
index c0dab8956593..6ed09d060596 100644
--- a/test/parallel/test-readdouble.js
+++ b/test/parallel/test-readdouble.js
@@ -2,7 +2,6 @@
 /*
  * Tests to verify we're reading in doubles correctly
  */
-var common = require('../common');
 var ASSERT = require('assert');
 
 /*
diff --git a/test/parallel/test-readfloat.js b/test/parallel/test-readfloat.js
index 5572bbf18e29..9f58995bbf68 100644
--- a/test/parallel/test-readfloat.js
+++ b/test/parallel/test-readfloat.js
@@ -2,7 +2,6 @@
 /*
  * Tests to verify we're reading in floats correctly
  */
-var common = require('../common');
 var ASSERT = require('assert');
 
 /*
diff --git a/test/parallel/test-readint.js b/test/parallel/test-readint.js
index 233128d792d0..bc14c0ee1c3f 100644
--- a/test/parallel/test-readint.js
+++ b/test/parallel/test-readint.js
@@ -2,7 +2,6 @@
 /*
  * Tests to verify we're reading in signed integers correctly
  */
-var common = require('../common');
 var ASSERT = require('assert');
 
 /*
diff --git a/test/parallel/test-readuint.js b/test/parallel/test-readuint.js
index b984541bfe9e..f83e69c86f6c 100644
--- a/test/parallel/test-readuint.js
+++ b/test/parallel/test-readuint.js
@@ -3,7 +3,6 @@
  * A battery of tests to help us read a series of uints
  */
 
-var common = require('../common');
 var ASSERT = require('assert');
 
 /*
diff --git a/test/parallel/test-ref-unref-return.js b/test/parallel/test-ref-unref-return.js
index a82a433ab1af..741d33058e2a 100644
--- a/test/parallel/test-ref-unref-return.js
+++ b/test/parallel/test-ref-unref-return.js
@@ -2,7 +2,6 @@
 var assert = require('assert');
 var net = require('net');
 var dgram = require('dgram');
-var common = require('../common');
 
 assert.ok((new net.Server()).ref() instanceof net.Server);
 assert.ok((new net.Server()).unref() instanceof net.Server);
diff --git a/test/parallel/test-regress-GH-6235.js b/test/parallel/test-regress-GH-6235.js
index 2f2f17d9698f..70392de5ca8c 100644
--- a/test/parallel/test-regress-GH-6235.js
+++ b/test/parallel/test-regress-GH-6235.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 assert.doesNotThrow(function() {
diff --git a/test/parallel/test-regress-GH-7511.js b/test/parallel/test-regress-GH-7511.js
index 0e5c4ded011a..04c434c8e54f 100644
--- a/test/parallel/test-regress-GH-7511.js
+++ b/test/parallel/test-regress-GH-7511.js
@@ -1,6 +1,5 @@
 'use strict';
-var common = require('../common'),
-    assert = require('assert'),
+var assert = require('assert'),
     vm     = require('vm');
 
 assert.doesNotThrow(function() {
diff --git a/test/parallel/test-regress-GH-897.js b/test/parallel/test-regress-GH-897.js
index 4b7ba61f9cec..80e9c8f70ee6 100644
--- a/test/parallel/test-regress-GH-897.js
+++ b/test/parallel/test-regress-GH-897.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var t = Date.now();
diff --git a/test/parallel/test-repl-console.js b/test/parallel/test-repl-console.js
index e66fcb1621ad..8a247b21df8e 100644
--- a/test/parallel/test-repl-console.js
+++ b/test/parallel/test-repl-console.js
@@ -1,6 +1,5 @@
 'use strict';
-var common = require('../common'),
-    assert = require('assert'),
+var assert = require('assert'),
     Stream = require('stream'),
     repl = require('repl');
 
diff --git a/test/parallel/test-repl-domain.js b/test/parallel/test-repl-domain.js
index 7528f502878f..5e10de45365c 100644
--- a/test/parallel/test-repl-domain.js
+++ b/test/parallel/test-repl-domain.js
@@ -1,6 +1,5 @@
 'use strict';
 var assert = require('assert');
-var common = require('../common');
 
 var util   = require('util');
 var repl   = require('repl');
diff --git a/test/parallel/test-repl-end-emits-exit.js b/test/parallel/test-repl-end-emits-exit.js
index e4bc4da78c14..63d61dd55735 100644
--- a/test/parallel/test-repl-end-emits-exit.js
+++ b/test/parallel/test-repl-end-emits-exit.js
@@ -1,6 +1,5 @@
 'use strict';
-var common = require('../common'),
-    assert = require('assert'),
+var assert = require('assert'),
     Stream = require('stream'),
     repl = require('repl'),
     terminalExit = 0,
diff --git a/test/parallel/test-repl-harmony.js b/test/parallel/test-repl-harmony.js
index 6bc5cb57aa11..119d4b3f087c 100644
--- a/test/parallel/test-repl-harmony.js
+++ b/test/parallel/test-repl-harmony.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var spawn = require('child_process').spawn;
diff --git a/test/parallel/test-repl-require-cache.js b/test/parallel/test-repl-require-cache.js
index d9b4d71d4846..3c180084e13c 100644
--- a/test/parallel/test-repl-require-cache.js
+++ b/test/parallel/test-repl-require-cache.js
@@ -1,6 +1,5 @@
 'use strict';
-var common = require('../common'),
-    assert = require('assert'),
+var assert = require('assert'),
     repl = require('repl');
 
 // https://github.com/joyent/node/issues/3226
diff --git a/test/parallel/test-repl-setprompt.js b/test/parallel/test-repl-setprompt.js
index b89dd6c928ab..35fc24e4f8c7 100644
--- a/test/parallel/test-repl-setprompt.js
+++ b/test/parallel/test-repl-setprompt.js
@@ -1,6 +1,5 @@
 'use strict';
-var common = require('../common'),
-    assert = require('assert'),
+var assert = require('assert'),
     spawn = require('child_process').spawn,
     os = require('os'),
     util = require('util');
diff --git a/test/parallel/test-repl-syntax-error-handling.js b/test/parallel/test-repl-syntax-error-handling.js
index 66e8fb6b352c..70ad58538269 100644
--- a/test/parallel/test-repl-syntax-error-handling.js
+++ b/test/parallel/test-repl-syntax-error-handling.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 switch (process.argv[2]) {
diff --git a/test/parallel/test-repl-unexpected-token-recoverable.js b/test/parallel/test-repl-unexpected-token-recoverable.js
index 4cfaa5136b6a..68e33c1de9ef 100644
--- a/test/parallel/test-repl-unexpected-token-recoverable.js
+++ b/test/parallel/test-repl-unexpected-token-recoverable.js
@@ -2,7 +2,6 @@
 /*
  * This is a regression test for https://github.com/joyent/node/issues/8874.
  */
-var common = require('../common');
 var assert = require('assert');
 
 var spawn = require('child_process').spawn;
diff --git a/test/parallel/test-require-cache.js b/test/parallel/test-require-cache.js
index f2245345e3e4..47d818f0d06c 100644
--- a/test/parallel/test-require-cache.js
+++ b/test/parallel/test-require-cache.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 (function testInjectFakeModule() {
diff --git a/test/parallel/test-signal-safety.js b/test/parallel/test-signal-safety.js
index 549c26662f71..514290c49018 100644
--- a/test/parallel/test-signal-safety.js
+++ b/test/parallel/test-signal-safety.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var Signal = process.binding('signal_wrap').Signal;
 
diff --git a/test/parallel/test-stdin-hang.js b/test/parallel/test-stdin-hang.js
index 4818a9ee9520..4bb14cd05021 100644
--- a/test/parallel/test-stdin-hang.js
+++ b/test/parallel/test-stdin-hang.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 
 // This test *only* verifies that invoking the stdin getter does not
 // cause node to hang indefinitely.
diff --git a/test/parallel/test-stdio-readable-writable.js b/test/parallel/test-stdio-readable-writable.js
index f8a8923498cb..75c4dcd18ea7 100644
--- a/test/parallel/test-stdio-readable-writable.js
+++ b/test/parallel/test-stdio-readable-writable.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 assert(process.stdout.writable);
diff --git a/test/parallel/test-stdout-close-unref.js b/test/parallel/test-stdout-close-unref.js
index 12a031562bf6..204832274537 100644
--- a/test/parallel/test-stdout-close-unref.js
+++ b/test/parallel/test-stdout-close-unref.js
@@ -1,6 +1,5 @@
 'use strict';
 var assert = require('assert');
-var common = require('../common');
 
 var errs = 0;
 
diff --git a/test/parallel/test-stream-big-packet.js b/test/parallel/test-stream-big-packet.js
index a9f6064c7e72..18a2e5ee4e33 100644
--- a/test/parallel/test-stream-big-packet.js
+++ b/test/parallel/test-stream-big-packet.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var util = require('util');
 var stream = require('stream');
diff --git a/test/parallel/test-stream-big-push.js b/test/parallel/test-stream-big-push.js
index e02ff98d3c74..bf1138c2a009 100644
--- a/test/parallel/test-stream-big-push.js
+++ b/test/parallel/test-stream-big-push.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var stream = require('stream');
 var str = 'asdfasdfasdfasdfasdf';
diff --git a/test/parallel/test-stream-duplex.js b/test/parallel/test-stream-duplex.js
index 0e8789d6bf55..15ed80f773a2 100644
--- a/test/parallel/test-stream-duplex.js
+++ b/test/parallel/test-stream-duplex.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Duplex = require('stream').Transform;
diff --git a/test/parallel/test-stream-end-paused.js b/test/parallel/test-stream-end-paused.js
index 585d6c327fd5..2d68b5ced563 100644
--- a/test/parallel/test-stream-end-paused.js
+++ b/test/parallel/test-stream-end-paused.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var gotEnd = false;
 
diff --git a/test/parallel/test-stream-ispaused.js b/test/parallel/test-stream-ispaused.js
index 8112dc733a72..6446c7e4370a 100644
--- a/test/parallel/test-stream-ispaused.js
+++ b/test/parallel/test-stream-ispaused.js
@@ -1,6 +1,5 @@
 'use strict';
 var assert = require('assert');
-var common = require('../common');
 
 var stream = require('stream');
 
diff --git a/test/parallel/test-stream-pipe-after-end.js b/test/parallel/test-stream-pipe-after-end.js
index 4bead73f68ce..4a8b57d0fb79 100644
--- a/test/parallel/test-stream-pipe-after-end.js
+++ b/test/parallel/test-stream-pipe-after-end.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Readable = require('_stream_readable');
diff --git a/test/parallel/test-stream-pipe-cleanup.js b/test/parallel/test-stream-pipe-cleanup.js
index 08da96f92c3a..0c6f41aebd07 100644
--- a/test/parallel/test-stream-pipe-cleanup.js
+++ b/test/parallel/test-stream-pipe-cleanup.js
@@ -2,7 +2,6 @@
 // This test asserts that Stream.prototype.pipe does not leave listeners
 // hanging on the source or dest.
 
-var common = require('../common');
 var stream = require('stream');
 var assert = require('assert');
 var util = require('util');
diff --git a/test/parallel/test-stream-pipe-error-handling.js b/test/parallel/test-stream-pipe-error-handling.js
index 031a0da7e395..f871452d2c7b 100644
--- a/test/parallel/test-stream-pipe-error-handling.js
+++ b/test/parallel/test-stream-pipe-error-handling.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var Stream = require('stream').Stream;
 
diff --git a/test/parallel/test-stream-pipe-event.js b/test/parallel/test-stream-pipe-event.js
index 0d10533b0c49..e3fcd22883f6 100644
--- a/test/parallel/test-stream-pipe-event.js
+++ b/test/parallel/test-stream-pipe-event.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var stream = require('stream');
 var assert = require('assert');
 var util = require('util');
diff --git a/test/parallel/test-stream-push-order.js b/test/parallel/test-stream-push-order.js
index d67233aff7a4..e41a02d8b2d8 100644
--- a/test/parallel/test-stream-push-order.js
+++ b/test/parallel/test-stream-push-order.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var Readable = require('stream').Readable;
 var assert = require('assert');
 
diff --git a/test/parallel/test-stream-push-strings.js b/test/parallel/test-stream-push-strings.js
index 0d9c0653c0dc..66974ad7932f 100644
--- a/test/parallel/test-stream-push-strings.js
+++ b/test/parallel/test-stream-push-strings.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Readable = require('stream').Readable;
diff --git a/test/parallel/test-stream-readable-constructor-set-methods.js b/test/parallel/test-stream-readable-constructor-set-methods.js
index 928ce31a8ebe..5ee34dc4f06c 100644
--- a/test/parallel/test-stream-readable-constructor-set-methods.js
+++ b/test/parallel/test-stream-readable-constructor-set-methods.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Readable = require('stream').Readable;
diff --git a/test/parallel/test-stream-readable-event.js b/test/parallel/test-stream-readable-event.js
index 965fc82c05a1..41faf5871e3a 100644
--- a/test/parallel/test-stream-readable-event.js
+++ b/test/parallel/test-stream-readable-event.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Readable = require('stream').Readable;
diff --git a/test/parallel/test-stream-readable-flow-recursion.js b/test/parallel/test-stream-readable-flow-recursion.js
index 07edd579f1de..c9e22bfbbc74 100644
--- a/test/parallel/test-stream-readable-flow-recursion.js
+++ b/test/parallel/test-stream-readable-flow-recursion.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // this test verifies that passing a huge number to read(size)
diff --git a/test/parallel/test-stream-transform-constructor-set-methods.js b/test/parallel/test-stream-transform-constructor-set-methods.js
index c24c273b6f20..04157e424a45 100644
--- a/test/parallel/test-stream-transform-constructor-set-methods.js
+++ b/test/parallel/test-stream-transform-constructor-set-methods.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Transform = require('stream').Transform;
diff --git a/test/parallel/test-stream-transform-objectmode-falsey-value.js b/test/parallel/test-stream-transform-objectmode-falsey-value.js
index 762f0500ad3e..7a40f8978f06 100644
--- a/test/parallel/test-stream-transform-objectmode-falsey-value.js
+++ b/test/parallel/test-stream-transform-objectmode-falsey-value.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var stream = require('stream');
diff --git a/test/parallel/test-stream-transform-split-objectmode.js b/test/parallel/test-stream-transform-split-objectmode.js
index 24833ece051e..5558c0a4f527 100644
--- a/test/parallel/test-stream-transform-split-objectmode.js
+++ b/test/parallel/test-stream-transform-split-objectmode.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Transform = require('stream').Transform;
diff --git a/test/parallel/test-stream-unshift-empty-chunk.js b/test/parallel/test-stream-unshift-empty-chunk.js
index a7dcad425310..3af315ea837a 100644
--- a/test/parallel/test-stream-unshift-empty-chunk.js
+++ b/test/parallel/test-stream-unshift-empty-chunk.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // This test verifies that stream.unshift(Buffer(0)) or
diff --git a/test/parallel/test-stream-unshift-read-race.js b/test/parallel/test-stream-unshift-read-race.js
index 90f519b5b5d7..0823c1af3461 100644
--- a/test/parallel/test-stream-unshift-read-race.js
+++ b/test/parallel/test-stream-unshift-read-race.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // This test verifies that:
diff --git a/test/parallel/test-stream-wrap.js b/test/parallel/test-stream-wrap.js
index e7a7ecddd238..69eda7b65d5b 100644
--- a/test/parallel/test-stream-wrap.js
+++ b/test/parallel/test-stream-wrap.js
@@ -1,5 +1,4 @@
 'use strict';
-const common = require('../common');
 const assert = require('assert');
 
 const StreamWrap = require('_stream_wrap');
diff --git a/test/parallel/test-stream-writable-change-default-encoding.js b/test/parallel/test-stream-writable-change-default-encoding.js
index a6fcda3e62a5..b8f9062a4fec 100644
--- a/test/parallel/test-stream-writable-change-default-encoding.js
+++ b/test/parallel/test-stream-writable-change-default-encoding.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var stream = require('stream');
diff --git a/test/parallel/test-stream-writable-constructor-set-methods.js b/test/parallel/test-stream-writable-constructor-set-methods.js
index 47fc458ce971..4716a478efac 100644
--- a/test/parallel/test-stream-writable-constructor-set-methods.js
+++ b/test/parallel/test-stream-writable-constructor-set-methods.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Writable = require('stream').Writable;
diff --git a/test/parallel/test-stream-writable-decoded-encoding.js b/test/parallel/test-stream-writable-decoded-encoding.js
index b637838c0c65..4df9ce84d78d 100644
--- a/test/parallel/test-stream-writable-decoded-encoding.js
+++ b/test/parallel/test-stream-writable-decoded-encoding.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var stream = require('stream');
diff --git a/test/parallel/test-stream-writev.js b/test/parallel/test-stream-writev.js
index f73270f2ff53..66db7f521f44 100644
--- a/test/parallel/test-stream-writev.js
+++ b/test/parallel/test-stream-writev.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var stream = require('stream');
diff --git a/test/parallel/test-stream2-base64-single-char-read-end.js b/test/parallel/test-stream2-base64-single-char-read-end.js
index e50ea5a0cc13..182325763956 100644
--- a/test/parallel/test-stream2-base64-single-char-read-end.js
+++ b/test/parallel/test-stream2-base64-single-char-read-end.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var R = require('_stream_readable');
 var W = require('_stream_writable');
 var assert = require('assert');
diff --git a/test/parallel/test-stream2-compatibility.js b/test/parallel/test-stream2-compatibility.js
index 9eab7b713bf1..2598c46ac540 100644
--- a/test/parallel/test-stream2-compatibility.js
+++ b/test/parallel/test-stream2-compatibility.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var R = require('_stream_readable');
 var assert = require('assert');
 
diff --git a/test/parallel/test-stream2-finish-pipe.js b/test/parallel/test-stream2-finish-pipe.js
index 913bb7b0b4db..1c6954b179c4 100644
--- a/test/parallel/test-stream2-finish-pipe.js
+++ b/test/parallel/test-stream2-finish-pipe.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var stream = require('stream');
 var Buffer = require('buffer').Buffer;
 
diff --git a/test/parallel/test-stream2-large-read-stall.js b/test/parallel/test-stream2-large-read-stall.js
index 4cd89599fee7..05f33f56884e 100644
--- a/test/parallel/test-stream2-large-read-stall.js
+++ b/test/parallel/test-stream2-large-read-stall.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // If everything aligns so that you do a read(n) of exactly the
diff --git a/test/parallel/test-stream2-objects.js b/test/parallel/test-stream2-objects.js
index a2f554a0b8a0..efffa2af527f 100644
--- a/test/parallel/test-stream2-objects.js
+++ b/test/parallel/test-stream2-objects.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var Readable = require('_stream_readable');
 var Writable = require('_stream_writable');
 var assert = require('assert');
diff --git a/test/parallel/test-stream2-pipe-error-handling.js b/test/parallel/test-stream2-pipe-error-handling.js
index 9eddbdd90d00..9db009b7eb68 100644
--- a/test/parallel/test-stream2-pipe-error-handling.js
+++ b/test/parallel/test-stream2-pipe-error-handling.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var stream = require('stream');
 
diff --git a/test/parallel/test-stream2-pipe-error-once-listener.js b/test/parallel/test-stream2-pipe-error-once-listener.js
index f2ecb87ce97a..6332c5dd85a7 100644
--- a/test/parallel/test-stream2-pipe-error-once-listener.js
+++ b/test/parallel/test-stream2-pipe-error-once-listener.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var util = require('util');
diff --git a/test/parallel/test-stream2-push.js b/test/parallel/test-stream2-push.js
index b58bce143585..7f9e399919b5 100644
--- a/test/parallel/test-stream2-push.js
+++ b/test/parallel/test-stream2-push.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var stream = require('stream');
 var Readable = stream.Readable;
 var Writable = stream.Writable;
diff --git a/test/parallel/test-stream2-read-sync-stack.js b/test/parallel/test-stream2-read-sync-stack.js
index e912e1039ff5..1a5a9ed4bbf9 100644
--- a/test/parallel/test-stream2-read-sync-stack.js
+++ b/test/parallel/test-stream2-read-sync-stack.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var Readable = require('stream').Readable;
 var r = new Readable();
diff --git a/test/parallel/test-stream2-readable-empty-buffer-no-eof.js b/test/parallel/test-stream2-readable-empty-buffer-no-eof.js
index 8e4001f8022f..067a1d735afc 100644
--- a/test/parallel/test-stream2-readable-empty-buffer-no-eof.js
+++ b/test/parallel/test-stream2-readable-empty-buffer-no-eof.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Readable = require('stream').Readable;
diff --git a/test/parallel/test-stream2-readable-from-list.js b/test/parallel/test-stream2-readable-from-list.js
index a8d9fb38f250..18cb6f01084a 100644
--- a/test/parallel/test-stream2-readable-from-list.js
+++ b/test/parallel/test-stream2-readable-from-list.js
@@ -1,6 +1,5 @@
 'use strict';
 var assert = require('assert');
-var common = require('../common');
 var fromList = require('_stream_readable')._fromList;
 
 // tiny node-tap lookalike.
diff --git a/test/parallel/test-stream2-readable-legacy-drain.js b/test/parallel/test-stream2-readable-legacy-drain.js
index 4218bace2b87..58f8feb9911e 100644
--- a/test/parallel/test-stream2-readable-legacy-drain.js
+++ b/test/parallel/test-stream2-readable-legacy-drain.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Stream = require('stream');
diff --git a/test/parallel/test-stream2-readable-non-empty-end.js b/test/parallel/test-stream2-readable-non-empty-end.js
index 46d6f92f2b9d..a59d3b73fc1b 100644
--- a/test/parallel/test-stream2-readable-non-empty-end.js
+++ b/test/parallel/test-stream2-readable-non-empty-end.js
@@ -1,6 +1,5 @@
 'use strict';
 var assert = require('assert');
-var common = require('../common');
 var Readable = require('_stream_readable');
 
 var len = 0;
diff --git a/test/parallel/test-stream2-readable-wrap-empty.js b/test/parallel/test-stream2-readable-wrap-empty.js
index 60417ca89330..d881c4537725 100644
--- a/test/parallel/test-stream2-readable-wrap-empty.js
+++ b/test/parallel/test-stream2-readable-wrap-empty.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Readable = require('_stream_readable');
diff --git a/test/parallel/test-stream2-readable-wrap.js b/test/parallel/test-stream2-readable-wrap.js
index 8e3e04b96601..d89a505a3067 100644
--- a/test/parallel/test-stream2-readable-wrap.js
+++ b/test/parallel/test-stream2-readable-wrap.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var Readable = require('_stream_readable');
diff --git a/test/parallel/test-stream2-set-encoding.js b/test/parallel/test-stream2-set-encoding.js
index ea9a315cb1a6..999524b4e81c 100644
--- a/test/parallel/test-stream2-set-encoding.js
+++ b/test/parallel/test-stream2-set-encoding.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var R = require('_stream_readable');
 var util = require('util');
diff --git a/test/parallel/test-stream2-transform.js b/test/parallel/test-stream2-transform.js
index e45c913c94f5..231ecfa57427 100644
--- a/test/parallel/test-stream2-transform.js
+++ b/test/parallel/test-stream2-transform.js
@@ -1,6 +1,5 @@
 'use strict';
 var assert = require('assert');
-var common = require('../common');
 var PassThrough = require('_stream_passthrough');
 var Transform = require('_stream_transform');
 
diff --git a/test/parallel/test-stream2-unpipe-leak.js b/test/parallel/test-stream2-unpipe-leak.js
index 15b510e7f643..e84f18221957 100644
--- a/test/parallel/test-stream2-unpipe-leak.js
+++ b/test/parallel/test-stream2-unpipe-leak.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var stream = require('stream');
 
diff --git a/test/parallel/test-stream2-writable.js b/test/parallel/test-stream2-writable.js
index 1d87d7f920c0..8ef0468a28a8 100644
--- a/test/parallel/test-stream2-writable.js
+++ b/test/parallel/test-stream2-writable.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var W = require('_stream_writable');
 var D = require('_stream_duplex');
 var assert = require('assert');
diff --git a/test/parallel/test-stream3-pause-then-read.js b/test/parallel/test-stream3-pause-then-read.js
index 135629a243d6..67ffb3e8a1e4 100644
--- a/test/parallel/test-stream3-pause-then-read.js
+++ b/test/parallel/test-stream3-pause-then-read.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var stream = require('stream');
diff --git a/test/parallel/test-string-decoder.js b/test/parallel/test-string-decoder.js
index 0b22d3dd04ef..222bfe30ed66 100644
--- a/test/parallel/test-string-decoder.js
+++ b/test/parallel/test-string-decoder.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var StringDecoder = require('string_decoder').StringDecoder;
 
diff --git a/test/parallel/test-stringbytes-external.js b/test/parallel/test-stringbytes-external.js
index be0c90d47f9f..c4a05d2c4670 100644
--- a/test/parallel/test-stringbytes-external.js
+++ b/test/parallel/test-stringbytes-external.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 // minimum string size to overflow into external string space
 var EXTERN_APEX = 0xFBEE9;
diff --git a/test/parallel/test-timers-args.js b/test/parallel/test-timers-args.js
index abb785ea0fc7..f55c3158d4ae 100644
--- a/test/parallel/test-timers-args.js
+++ b/test/parallel/test-timers-args.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 function range(n) {
diff --git a/test/parallel/test-timers-immediate-queue.js b/test/parallel/test-timers-immediate-queue.js
index a71472d46442..d23453fc3a58 100644
--- a/test/parallel/test-timers-immediate-queue.js
+++ b/test/parallel/test-timers-immediate-queue.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // setImmediate should run clear its queued cbs once per event loop turn
diff --git a/test/parallel/test-timers-immediate.js b/test/parallel/test-timers-immediate.js
index bcfc4616ac62..5fc1e06cf904 100644
--- a/test/parallel/test-timers-immediate.js
+++ b/test/parallel/test-timers-immediate.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var immediateA = false,
diff --git a/test/parallel/test-timers-linked-list.js b/test/parallel/test-timers-linked-list.js
index 00b2129d126c..2dd527aaa7ec 100644
--- a/test/parallel/test-timers-linked-list.js
+++ b/test/parallel/test-timers-linked-list.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var L = require('_linklist');
 
diff --git a/test/parallel/test-timers-now.js b/test/parallel/test-timers-now.js
index 466bd064b8de..af5914f399dc 100644
--- a/test/parallel/test-timers-now.js
+++ b/test/parallel/test-timers-now.js
@@ -1,6 +1,5 @@
 'use strict';
 
-const common = require('../common');
 const assert = require('assert');
 
 // Return value of Timer.now() should easily fit in a SMI right after start-up.
diff --git a/test/parallel/test-timers-ordering.js b/test/parallel/test-timers-ordering.js
index 730a78a072c6..acb990f8ef35 100644
--- a/test/parallel/test-timers-ordering.js
+++ b/test/parallel/test-timers-ordering.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var Timer = process.binding('timer_wrap').Timer;
 
diff --git a/test/parallel/test-timers-uncaught-exception.js b/test/parallel/test-timers-uncaught-exception.js
index 794b3b923be1..03aa73e1b7b0 100644
--- a/test/parallel/test-timers-uncaught-exception.js
+++ b/test/parallel/test-timers-uncaught-exception.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var exceptions = 0;
diff --git a/test/parallel/test-timers-unref-active.js b/test/parallel/test-timers-unref-active.js
index 08f28b0153fe..a9169759dea4 100644
--- a/test/parallel/test-timers-unref-active.js
+++ b/test/parallel/test-timers-unref-active.js
@@ -15,7 +15,6 @@
  * all 10 timeouts had the time to expire.
  */
 
-const common = require('../common');
 const timers = require('timers');
 const assert = require('assert');
 
diff --git a/test/parallel/test-timers-unref-call.js b/test/parallel/test-timers-unref-call.js
index b348330d200d..4afa3b2cd228 100644
--- a/test/parallel/test-timers-unref-call.js
+++ b/test/parallel/test-timers-unref-call.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 
 var Timer = process.binding('timer_wrap').Timer;
 Timer.now = function() { return ++Timer.now.ticks; };
diff --git a/test/parallel/test-timers-unref-remove-other-unref-timers-only-one-fires.js b/test/parallel/test-timers-unref-remove-other-unref-timers-only-one-fires.js
index aead4a4e7def..835ba8f7e527 100644
--- a/test/parallel/test-timers-unref-remove-other-unref-timers-only-one-fires.js
+++ b/test/parallel/test-timers-unref-remove-other-unref-timers-only-one-fires.js
@@ -10,7 +10,6 @@
  * This behavior is a private implementation detail and should not be
  * considered public interface.
  */
-const common = require('../common');
 const timers = require('timers');
 const assert = require('assert');
 
diff --git a/test/parallel/test-timers-unref.js b/test/parallel/test-timers-unref.js
index ab2e33acd210..82bdd109f278 100644
--- a/test/parallel/test-timers-unref.js
+++ b/test/parallel/test-timers-unref.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var interval_fired = false,
diff --git a/test/parallel/test-timers-zero-timeout.js b/test/parallel/test-timers-zero-timeout.js
index 1c84814363a6..dabf56de07f5 100644
--- a/test/parallel/test-timers-zero-timeout.js
+++ b/test/parallel/test-timers-zero-timeout.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // https://github.com/joyent/node/issues/2079 - zero timeout drops extra args
diff --git a/test/parallel/test-timers.js b/test/parallel/test-timers.js
index e784e262959d..05a324a81315 100644
--- a/test/parallel/test-timers.js
+++ b/test/parallel/test-timers.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var inputs = [
diff --git a/test/parallel/test-tty-wrap.js b/test/parallel/test-tty-wrap.js
index dbe7b6890fd2..8f3829afc6dd 100644
--- a/test/parallel/test-tty-wrap.js
+++ b/test/parallel/test-tty-wrap.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var TTY = process.binding('tty_wrap').TTY;
diff --git a/test/parallel/test-url.js b/test/parallel/test-url.js
index 5098c7e46ab6..e69259d99883 100644
--- a/test/parallel/test-url.js
+++ b/test/parallel/test-url.js
@@ -1,6 +1,5 @@
 /* eslint-disable max-len */
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var url = require('url'),
diff --git a/test/parallel/test-utf8-scripts.js b/test/parallel/test-utf8-scripts.js
index 3a891283509b..8338ee68ee58 100644
--- a/test/parallel/test-utf8-scripts.js
+++ b/test/parallel/test-utf8-scripts.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // üäö
diff --git a/test/parallel/test-util-format.js b/test/parallel/test-util-format.js
index 6761671e1997..28a9419ebd3e 100644
--- a/test/parallel/test-util-format.js
+++ b/test/parallel/test-util-format.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var util = require('util');
 var symbol = Symbol('foo');
diff --git a/test/parallel/test-util-inspect.js b/test/parallel/test-util-inspect.js
index 58a4c8a2f2b1..53640e0fd99b 100644
--- a/test/parallel/test-util-inspect.js
+++ b/test/parallel/test-util-inspect.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var util = require('util');
 
diff --git a/test/parallel/test-util.js b/test/parallel/test-util.js
index 79e104546b7f..c2cd058e7398 100644
--- a/test/parallel/test-util.js
+++ b/test/parallel/test-util.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var util = require('util');
 var context = require('vm').runInNewContext;
diff --git a/test/parallel/test-v8-flag-type-check.js b/test/parallel/test-v8-flag-type-check.js
index 68bf30dba3cd..ef2b241d9946 100644
--- a/test/parallel/test-v8-flag-type-check.js
+++ b/test/parallel/test-v8-flag-type-check.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var v8 = require('v8');
 
diff --git a/test/parallel/test-v8-flags.js b/test/parallel/test-v8-flags.js
index d21cbc6c2635..02acabf4fc78 100644
--- a/test/parallel/test-v8-flags.js
+++ b/test/parallel/test-v8-flags.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var v8 = require('v8');
 var vm = require('vm');
diff --git a/test/parallel/test-v8-stats.js b/test/parallel/test-v8-stats.js
index fc4a6df30f8e..935e13df6600 100644
--- a/test/parallel/test-v8-stats.js
+++ b/test/parallel/test-v8-stats.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var v8 = require('v8');
 
diff --git a/test/parallel/test-vm-basic.js b/test/parallel/test-vm-basic.js
index 96c615c44af1..8d505b7cab5a 100644
--- a/test/parallel/test-vm-basic.js
+++ b/test/parallel/test-vm-basic.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-vm-context-async-script.js b/test/parallel/test-vm-context-async-script.js
index e146d48343aa..314bd9de55b2 100644
--- a/test/parallel/test-vm-context-async-script.js
+++ b/test/parallel/test-vm-context-async-script.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-vm-context-property-forwarding.js b/test/parallel/test-vm-context-property-forwarding.js
index 5fcd64b8ba90..951fd7fd8605 100644
--- a/test/parallel/test-vm-context-property-forwarding.js
+++ b/test/parallel/test-vm-context-property-forwarding.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-vm-context.js b/test/parallel/test-vm-context.js
index 45e19e663889..d6a48dd32e8a 100644
--- a/test/parallel/test-vm-context.js
+++ b/test/parallel/test-vm-context.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var vm = require('vm');
diff --git a/test/parallel/test-vm-create-and-run-in-context.js b/test/parallel/test-vm-create-and-run-in-context.js
index 01df6ad4531e..7ca1949590fd 100644
--- a/test/parallel/test-vm-create-and-run-in-context.js
+++ b/test/parallel/test-vm-create-and-run-in-context.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var vm = require('vm');
diff --git a/test/parallel/test-vm-create-context-accessors.js b/test/parallel/test-vm-create-context-accessors.js
index 678cf3fbd212..a1aa4f3ef9a0 100644
--- a/test/parallel/test-vm-create-context-accessors.js
+++ b/test/parallel/test-vm-create-context-accessors.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-vm-create-context-arg.js b/test/parallel/test-vm-create-context-arg.js
index d44eeec18dec..7d172248c17f 100644
--- a/test/parallel/test-vm-create-context-arg.js
+++ b/test/parallel/test-vm-create-context-arg.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-vm-create-context-circular-reference.js b/test/parallel/test-vm-create-context-circular-reference.js
index cb6a90dcaef3..28952d25f05f 100644
--- a/test/parallel/test-vm-create-context-circular-reference.js
+++ b/test/parallel/test-vm-create-context-circular-reference.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-vm-cross-context.js b/test/parallel/test-vm-cross-context.js
index 20a3792b2857..8900b4f57e86 100644
--- a/test/parallel/test-vm-cross-context.js
+++ b/test/parallel/test-vm-cross-context.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var vm = require('vm');
diff --git a/test/parallel/test-vm-function-declaration.js b/test/parallel/test-vm-function-declaration.js
index 5ff194e12dd8..2a07e2009eba 100644
--- a/test/parallel/test-vm-function-declaration.js
+++ b/test/parallel/test-vm-function-declaration.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var vm = require('vm');
diff --git a/test/parallel/test-vm-global-define-property.js b/test/parallel/test-vm-global-define-property.js
index f7f3e4f3df7d..c19ed9002653 100644
--- a/test/parallel/test-vm-global-define-property.js
+++ b/test/parallel/test-vm-global-define-property.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var vm = require('vm');
diff --git a/test/parallel/test-vm-global-identity.js b/test/parallel/test-vm-global-identity.js
index 647edb22b44d..3ddfc0485e54 100644
--- a/test/parallel/test-vm-global-identity.js
+++ b/test/parallel/test-vm-global-identity.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-vm-harmony-proxies.js b/test/parallel/test-vm-harmony-proxies.js
index 2f008615ebaf..6bd5c160e531 100644
--- a/test/parallel/test-vm-harmony-proxies.js
+++ b/test/parallel/test-vm-harmony-proxies.js
@@ -1,7 +1,6 @@
 'use strict';
 // Flags: --harmony_proxies
 
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-vm-harmony-symbols.js b/test/parallel/test-vm-harmony-symbols.js
index 86fde1b978ff..8d931fd08c27 100644
--- a/test/parallel/test-vm-harmony-symbols.js
+++ b/test/parallel/test-vm-harmony-symbols.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-vm-is-context.js b/test/parallel/test-vm-is-context.js
index 5a46a452b916..9878caa60775 100644
--- a/test/parallel/test-vm-is-context.js
+++ b/test/parallel/test-vm-is-context.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-vm-preserves-property.js b/test/parallel/test-vm-preserves-property.js
index 85ce2d6e8165..b111b18d358a 100644
--- a/test/parallel/test-vm-preserves-property.js
+++ b/test/parallel/test-vm-preserves-property.js
@@ -1,6 +1,5 @@
 'use strict';
 
-var common = require('../common');
 var assert = require('assert');
 
 var vm = require('vm');
diff --git a/test/parallel/test-vm-symbols.js b/test/parallel/test-vm-symbols.js
index d7d0ffe3af61..10f79951dda8 100644
--- a/test/parallel/test-vm-symbols.js
+++ b/test/parallel/test-vm-symbols.js
@@ -1,6 +1,5 @@
 'use strict';
 
-var common = require('../common');
 var assert = require('assert');
 
 var vm = require('vm');
diff --git a/test/parallel/test-vm-syntax-error-message.js b/test/parallel/test-vm-syntax-error-message.js
index 4b48b0d474a8..1d94e1679ba7 100644
--- a/test/parallel/test-vm-syntax-error-message.js
+++ b/test/parallel/test-vm-syntax-error-message.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var child_process = require('child_process');
 
diff --git a/test/parallel/test-vm-timeout.js b/test/parallel/test-vm-timeout.js
index e9511e59230a..5a92ac5104a5 100644
--- a/test/parallel/test-vm-timeout.js
+++ b/test/parallel/test-vm-timeout.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var vm = require('vm');
 
diff --git a/test/parallel/test-writedouble.js b/test/parallel/test-writedouble.js
index 2a9ab11107f1..19b3f5461a65 100644
--- a/test/parallel/test-writedouble.js
+++ b/test/parallel/test-writedouble.js
@@ -2,7 +2,6 @@
 /*
  * Tests to verify we're writing doubles correctly
  */
-var common = require('../common');
 var ASSERT = require('assert');
 
 function test(clazz) {
diff --git a/test/parallel/test-writefloat.js b/test/parallel/test-writefloat.js
index 948bf4910208..688fba72d668 100644
--- a/test/parallel/test-writefloat.js
+++ b/test/parallel/test-writefloat.js
@@ -2,7 +2,6 @@
 /*
  * Tests to verify we're writing floats correctly
  */
-var common = require('../common');
 var ASSERT = require('assert');
 
 function test(clazz) {
diff --git a/test/parallel/test-writeint.js b/test/parallel/test-writeint.js
index ee981a157ad7..919cf329e14d 100644
--- a/test/parallel/test-writeint.js
+++ b/test/parallel/test-writeint.js
@@ -2,7 +2,6 @@
 /*
  * Tests to verify we're writing signed integers correctly
  */
-var common = require('../common');
 var ASSERT = require('assert');
 
 function test8(clazz) {
diff --git a/test/parallel/test-writeuint.js b/test/parallel/test-writeuint.js
index 22579ceecaef..46e9c0478037 100644
--- a/test/parallel/test-writeuint.js
+++ b/test/parallel/test-writeuint.js
@@ -2,7 +2,6 @@
 /*
  * A battery of tests to help us read a series of uints
  */
-var common = require('../common');
 var ASSERT = require('assert');
 
 /*
diff --git a/test/parallel/test-zlib-close-after-write.js b/test/parallel/test-zlib-close-after-write.js
index c02ff33fb5eb..3fcecef94730 100644
--- a/test/parallel/test-zlib-close-after-write.js
+++ b/test/parallel/test-zlib-close-after-write.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var zlib = require('zlib');
 
diff --git a/test/parallel/test-zlib-const.js b/test/parallel/test-zlib-const.js
index 511eca613a52..ff0def8439d0 100644
--- a/test/parallel/test-zlib-const.js
+++ b/test/parallel/test-zlib-const.js
@@ -1,5 +1,4 @@
 /* eslint-disable strict */
-var common = require('../common');
 var assert = require('assert');
 
 var zlib = require('zlib');
diff --git a/test/parallel/test-zlib-convenience-methods.js b/test/parallel/test-zlib-convenience-methods.js
index 5808bdf04a8f..a6584c2708ad 100644
--- a/test/parallel/test-zlib-convenience-methods.js
+++ b/test/parallel/test-zlib-convenience-methods.js
@@ -1,7 +1,6 @@
 'use strict';
 // test convenience methods with and without options supplied
 
-var common = require('../common');
 var assert = require('assert');
 var zlib = require('zlib');
 
diff --git a/test/parallel/test-zlib-dictionary.js b/test/parallel/test-zlib-dictionary.js
index 109f4273f767..bdd09cafc7f7 100644
--- a/test/parallel/test-zlib-dictionary.js
+++ b/test/parallel/test-zlib-dictionary.js
@@ -1,7 +1,6 @@
 'use strict';
 // test compression/decompression with dictionary
 
-var common = require('../common');
 var assert = require('assert');
 var zlib = require('zlib');
 var path = require('path');
diff --git a/test/parallel/test-zlib-from-string.js b/test/parallel/test-zlib-from-string.js
index 49f4d139c148..6665c39e8f05 100644
--- a/test/parallel/test-zlib-from-string.js
+++ b/test/parallel/test-zlib-from-string.js
@@ -1,7 +1,6 @@
 'use strict';
 // test compressing and uncompressing a string with zlib
 
-var common = require('../common');
 var assert = require('assert');
 var zlib = require('zlib');
 
diff --git a/test/parallel/test-zlib-invalid-input.js b/test/parallel/test-zlib-invalid-input.js
index e1e81bacc1a4..13ff3a244d1a 100644
--- a/test/parallel/test-zlib-invalid-input.js
+++ b/test/parallel/test-zlib-invalid-input.js
@@ -1,8 +1,7 @@
 'use strict';
 // test uncompressing invalid input
 
-var common = require('../common'),
-    assert = require('assert'),
+var assert = require('assert'),
     zlib = require('zlib');
 
 var nonStringInputs = [1, true, {a: 1}, ['a']];
diff --git a/test/parallel/test-zlib-write-after-close.js b/test/parallel/test-zlib-write-after-close.js
index a1d9adb6d9b9..2d5c547397a3 100644
--- a/test/parallel/test-zlib-write-after-close.js
+++ b/test/parallel/test-zlib-write-after-close.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var zlib = require('zlib');
 
diff --git a/test/parallel/test-zlib-write-after-flush.js b/test/parallel/test-zlib-write-after-flush.js
index 4c53ca49ebf7..92ee51ab1219 100644
--- a/test/parallel/test-zlib-write-after-flush.js
+++ b/test/parallel/test-zlib-write-after-flush.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var zlib = require('zlib');
 var fs = require('fs');
diff --git a/test/parallel/test-zlib-zero-byte.js b/test/parallel/test-zlib-zero-byte.js
index 9aa260a7f314..2ac1a1aceaf0 100644
--- a/test/parallel/test-zlib-zero-byte.js
+++ b/test/parallel/test-zlib-zero-byte.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var zlib = require('zlib');
diff --git a/test/pummel/test-crypto-dh.js b/test/pummel/test-crypto-dh.js
index a223e45c866b..62b31b820242 100644
--- a/test/pummel/test-crypto-dh.js
+++ b/test/pummel/test-crypto-dh.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 try {
diff --git a/test/pummel/test-dtrace-jsstack.js b/test/pummel/test-dtrace-jsstack.js
index 67194a3dd77f..ec1446e3bd90 100644
--- a/test/pummel/test-dtrace-jsstack.js
+++ b/test/pummel/test-dtrace-jsstack.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var os = require('os');
 var util = require('util');
diff --git a/test/pummel/test-next-tick-infinite-calls.js b/test/pummel/test-next-tick-infinite-calls.js
index d4fdb3496423..a413dfd3950e 100644
--- a/test/pummel/test-next-tick-infinite-calls.js
+++ b/test/pummel/test-next-tick-infinite-calls.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var complete = 0;
diff --git a/test/pummel/test-process-hrtime.js b/test/pummel/test-process-hrtime.js
index 4fd66c03907a..7622c803fea9 100644
--- a/test/pummel/test-process-hrtime.js
+++ b/test/pummel/test-process-hrtime.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var start = process.hrtime();
diff --git a/test/pummel/test-process-uptime.js b/test/pummel/test-process-uptime.js
index a80806c2099c..f0519dc00a57 100644
--- a/test/pummel/test-process-uptime.js
+++ b/test/pummel/test-process-uptime.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 console.error(process.uptime());
diff --git a/test/pummel/test-stream-pipe-multi.js b/test/pummel/test-stream-pipe-multi.js
index 807e3c141515..e961c4d63aca 100644
--- a/test/pummel/test-stream-pipe-multi.js
+++ b/test/pummel/test-stream-pipe-multi.js
@@ -2,7 +2,6 @@
 // Test that having a bunch of streams piping in parallel
 // doesn't break anything.
 
-var common = require('../common');
 var assert = require('assert');
 var Stream = require('stream').Stream;
 var rr = [];
diff --git a/test/pummel/test-stream2-basic.js b/test/pummel/test-stream2-basic.js
index fe921dc00583..bac28d89ad3e 100644
--- a/test/pummel/test-stream2-basic.js
+++ b/test/pummel/test-stream2-basic.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var R = require('_stream_readable');
 var assert = require('assert');
 
diff --git a/test/pummel/test-timer-wrap.js b/test/pummel/test-timer-wrap.js
index 62ba69d3fde0..ab9d07b8e0ee 100644
--- a/test/pummel/test-timer-wrap.js
+++ b/test/pummel/test-timer-wrap.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var timeouts = 0;
diff --git a/test/pummel/test-timer-wrap2.js b/test/pummel/test-timer-wrap2.js
index b289a85644a0..79582546d9ad 100644
--- a/test/pummel/test-timer-wrap2.js
+++ b/test/pummel/test-timer-wrap2.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // Test that allocating a timer does not increase the loop's reference
diff --git a/test/pummel/test-timers.js b/test/pummel/test-timers.js
index 2225da91edcf..5ccf61f203f6 100644
--- a/test/pummel/test-timers.js
+++ b/test/pummel/test-timers.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var WINDOW = 200; // why is does this need to be so big?
diff --git a/test/pummel/test-vm-memleak.js b/test/pummel/test-vm-memleak.js
index f93f34127f92..b2e48fd30451 100644
--- a/test/pummel/test-vm-memleak.js
+++ b/test/pummel/test-vm-memleak.js
@@ -2,7 +2,6 @@
 // Flags: --max_old_space_size=32
 
 var assert = require('assert');
-var common = require('../common');
 
 var start = Date.now();
 var maxMem = 0;
diff --git a/test/sequential/test-debug-args.js b/test/sequential/test-debug-args.js
index eb1533d4418a..3532d885ff81 100644
--- a/test/sequential/test-debug-args.js
+++ b/test/sequential/test-debug-args.js
@@ -1,7 +1,6 @@
 'use strict';
 // Flags: --debugger
 
-var common = require('../common');
 var assert = require('assert');
 
 assert.notEqual(process.execArgv.indexOf('--debugger'), -1);
diff --git a/test/sequential/test-deprecation-flags.js b/test/sequential/test-deprecation-flags.js
index ca325654c55d..cea2e2cdd30b 100644
--- a/test/sequential/test-deprecation-flags.js
+++ b/test/sequential/test-deprecation-flags.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var execFile = require('child_process').execFile;
 var depmod = require.resolve('../fixtures/deprecated.js');
diff --git a/test/sequential/test-net-listen-exclusive-random-ports.js b/test/sequential/test-net-listen-exclusive-random-ports.js
index c32273a59b2a..14271be2f471 100644
--- a/test/sequential/test-net-listen-exclusive-random-ports.js
+++ b/test/sequential/test-net-listen-exclusive-random-ports.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var cluster = require('cluster');
 var net = require('net');
diff --git a/test/sequential/test-regress-GH-1726.js b/test/sequential/test-regress-GH-1726.js
index 859ab6cc5e42..3c0953c9af76 100644
--- a/test/sequential/test-regress-GH-1726.js
+++ b/test/sequential/test-regress-GH-1726.js
@@ -4,7 +4,6 @@
 // exit when its child exits.
 // https://github.com/joyent/node/issues/1726
 
-var common = require('../common');
 var assert = require('assert');
 var ch = require('child_process');
 
diff --git a/test/sequential/test-regress-GH-819.js b/test/sequential/test-regress-GH-819.js
index e459587d97cb..05b3755fc5ba 100644
--- a/test/sequential/test-regress-GH-819.js
+++ b/test/sequential/test-regress-GH-819.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var net = require('net');
 var assert = require('assert');
 
diff --git a/test/sequential/test-setproctitle.js b/test/sequential/test-setproctitle.js
index 11395f4fdbc5..5168348b460a 100644
--- a/test/sequential/test-setproctitle.js
+++ b/test/sequential/test-setproctitle.js
@@ -7,7 +7,6 @@ if ('linux freebsd darwin'.indexOf(process.platform) === -1) {
   return;
 }
 
-var common = require('../common');
 var assert = require('assert');
 var exec = require('child_process').exec;
 var path = require('path');
diff --git a/test/sequential/test-sigint-infinite-loop.js b/test/sequential/test-sigint-infinite-loop.js
index 8211aeb69ec5..a20b9bb8a746 100644
--- a/test/sequential/test-sigint-infinite-loop.js
+++ b/test/sequential/test-sigint-infinite-loop.js
@@ -2,7 +2,6 @@
 // This test is to assert that we can SIGINT a script which loops forever.
 // Ref(http):
 // groups.google.com/group/nodejs-dev/browse_thread/thread/e20f2f8df0296d3f
-var common = require('../common');
 var assert = require('assert');
 var spawn = require('child_process').spawn;
 
diff --git a/test/sequential/test-stdin-child-proc.js b/test/sequential/test-stdin-child-proc.js
index 93bf265b8b00..923a4eb012da 100644
--- a/test/sequential/test-stdin-child-proc.js
+++ b/test/sequential/test-stdin-child-proc.js
@@ -1,7 +1,6 @@
 'use strict';
 // This tests that pausing and resuming stdin does not hang and timeout
 // when done in a child process.  See test/simple/test-stdin-pause-resume.js
-var common = require('../common');
 var child_process = require('child_process');
 var path = require('path');
 child_process.spawn(process.execPath,
diff --git a/test/sequential/test-stdin-pipe-resume.js b/test/sequential/test-stdin-pipe-resume.js
index dbac78d78c5e..e159aaea0a60 100644
--- a/test/sequential/test-stdin-pipe-resume.js
+++ b/test/sequential/test-stdin-pipe-resume.js
@@ -1,6 +1,5 @@
 'use strict';
 // This tests that piping stdin will cause it to resume() as well.
-var common = require('../common');
 var assert = require('assert');
 
 if (process.argv[2] === 'child') {
diff --git a/test/sequential/test-stdin-script-child.js b/test/sequential/test-stdin-script-child.js
index 8590df02d8ef..03ad46b095ab 100644
--- a/test/sequential/test-stdin-script-child.js
+++ b/test/sequential/test-stdin-script-child.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 var spawn = require('child_process').spawn;
diff --git a/test/sequential/test-stdout-cannot-be-closed-child-process-pipe.js b/test/sequential/test-stdout-cannot-be-closed-child-process-pipe.js
index c6f5aecd40e2..b64aa9b2ee10 100644
--- a/test/sequential/test-stdout-cannot-be-closed-child-process-pipe.js
+++ b/test/sequential/test-stdout-cannot-be-closed-child-process-pipe.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 if (process.argv[2] === 'child')
diff --git a/test/sequential/test-stdout-stderr-reading.js b/test/sequential/test-stdout-stderr-reading.js
index 82fd51cedda1..d3ad8cbb5811 100644
--- a/test/sequential/test-stdout-stderr-reading.js
+++ b/test/sequential/test-stdout-stderr-reading.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 // verify that stdout is never read from.
diff --git a/test/sequential/test-stream2-stderr-sync.js b/test/sequential/test-stream2-stderr-sync.js
index ccbdc55e4fea..8d800c88bd0e 100644
--- a/test/sequential/test-stream2-stderr-sync.js
+++ b/test/sequential/test-stream2-stderr-sync.js
@@ -1,7 +1,6 @@
 'use strict';
 // Make sure that sync writes to stderr get processed before exiting.
 
-var common = require('../common');
 var assert = require('assert');
 var util = require('util');
 
diff --git a/test/sequential/test-sync-fileread.js b/test/sequential/test-sync-fileread.js
index 24a80d96c260..e94064f02987 100644
--- a/test/sequential/test-sync-fileread.js
+++ b/test/sequential/test-sync-fileread.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 var path = require('path');
 var fs = require('fs');
diff --git a/test/sequential/test-util-debug.js b/test/sequential/test-util-debug.js
index 834c21ec0e50..6c220a2b687d 100644
--- a/test/sequential/test-util-debug.js
+++ b/test/sequential/test-util-debug.js
@@ -1,5 +1,4 @@
 'use strict';
-var common = require('../common');
 var assert = require('assert');
 
 if (process.argv[2] === 'child')
diff --git a/test/timers/test-timers-reliability.js b/test/timers/test-timers-reliability.js
index b4332468bc2e..e1bf227f2c6e 100644
--- a/test/timers/test-timers-reliability.js
+++ b/test/timers/test-timers-reliability.js
@@ -1,8 +1,6 @@
 'use strict';
 // FaketimeFlags: --exclude-monotonic -f '2014-07-21 09:00:00'
 
-var common = require('../common');
-
 var Timer  = process.binding('timer_wrap').Timer;
 var assert = require('assert');