diff --git a/test/common.js b/test/common.js
index 0e824efd94fe6d..c1012e7a097688 100644
--- a/test/common.js
+++ b/test/common.js
@@ -5,6 +5,8 @@ var fs = require('fs');
 var assert = require('assert');
 var os = require('os');
 var child_process = require('child_process');
+const stream = require('stream');
+const util = require('util');
 
 
 exports.testDir = path.dirname(__filename);
@@ -503,3 +505,20 @@ exports.nodeProcessAborted = function nodeProcessAborted(exitCode, signal) {
     return expectedExitCodes.indexOf(exitCode) > -1;
   }
 };
+
+// A stream to push an array into a REPL
+function ArrayStream() {
+  this.run = function(data) {
+    data.forEach(line => {
+      this.emit('data', line + '\n');
+    });
+  };
+}
+
+util.inherits(ArrayStream, stream.Stream);
+exports.ArrayStream = ArrayStream;
+ArrayStream.prototype.readable = true;
+ArrayStream.prototype.writable = true;
+ArrayStream.prototype.pause = function() {};
+ArrayStream.prototype.resume = function() {};
+ArrayStream.prototype.write = function() {};
diff --git a/test/parallel/test-repl-.save.load.js b/test/parallel/test-repl-.save.load.js
index 56566719926519..c71b383bcd7409 100644
--- a/test/parallel/test-repl-.save.load.js
+++ b/test/parallel/test-repl-.save.load.js
@@ -9,24 +9,9 @@ common.refreshTmpDir();
 
 var repl = require('repl');
 
-// A stream to push an array into a REPL
-function ArrayStream() {
-  this.run = function(data) {
-    var self = this;
-    data.forEach(function(line) {
-      self.emit('data', line + '\n');
-    });
-  };
-}
-util.inherits(ArrayStream, require('stream').Stream);
-ArrayStream.prototype.readable = true;
-ArrayStream.prototype.writable = true;
-ArrayStream.prototype.resume = function() {};
-ArrayStream.prototype.write = function() {};
-
 var works = [['inner.one'], 'inner.o'];
 
-var putIn = new ArrayStream();
+const putIn = new common.ArrayStream();
 var testMe = repl.start('', putIn);
 
 
diff --git a/test/parallel/test-repl-autolibs.js b/test/parallel/test-repl-autolibs.js
index e37f2d036ece4d..05cc299f56888f 100644
--- a/test/parallel/test-repl-autolibs.js
+++ b/test/parallel/test-repl-autolibs.js
@@ -1,25 +1,13 @@
-/* eslint-disable required-modules */
 'use strict';
+const common = require('../common');
 var assert = require('assert');
 var util = require('util');
 var repl = require('repl');
 
-// A stream to push an array into a REPL
-function ArrayStream() {
-  this.run = function(data) {
-    var self = this;
-    data.forEach(function(line) {
-      self.emit('data', line + '\n');
-    });
-  };
-}
-util.inherits(ArrayStream, require('stream').Stream);
-ArrayStream.prototype.readable = true;
-ArrayStream.prototype.writable = true;
-ArrayStream.prototype.resume = function() {};
-ArrayStream.prototype.write = function() {};
+// This test adds global variables
+common.globalCheck = false;
 
-var putIn = new ArrayStream();
+const putIn = new common.ArrayStream();
 var testMe = repl.start('', putIn, null, true);
 
 test1();
diff --git a/test/parallel/test-repl-console.js b/test/parallel/test-repl-console.js
index e66fcb1621adc5..fe737d841e1651 100644
--- a/test/parallel/test-repl-console.js
+++ b/test/parallel/test-repl-console.js
@@ -1,13 +1,10 @@
 'use strict';
 var common = require('../common'),
     assert = require('assert'),
-    Stream = require('stream'),
     repl = require('repl');
 
-// create a dummy stream that does nothing
-var stream = new Stream();
-stream.write = stream.pause = stream.resume = function() {};
-stream.readable = stream.writable = true;
+// Create a dummy stream that does nothing
+const stream = new common.ArrayStream();
 
 var r = repl.start({
   input: stream,
diff --git a/test/parallel/test-repl-domain.js b/test/parallel/test-repl-domain.js
index 7528f502878f63..baf0485b3b80b2 100644
--- a/test/parallel/test-repl-domain.js
+++ b/test/parallel/test-repl-domain.js
@@ -5,22 +5,7 @@ var common = require('../common');
 var util   = require('util');
 var repl   = require('repl');
 
-// A stream to push an array into a REPL
-function ArrayStream() {
-  this.run = function(data) {
-    var self = this;
-    data.forEach(function(line) {
-      self.emit('data', line + '\n');
-    });
-  };
-}
-util.inherits(ArrayStream, require('stream').Stream);
-ArrayStream.prototype.readable = true;
-ArrayStream.prototype.writable = true;
-ArrayStream.prototype.resume = function() {};
-ArrayStream.prototype.write = function() {};
-
-var putIn = new ArrayStream();
+const putIn = new common.ArrayStream();
 var testMe = repl.start('', putIn);
 
 putIn.write = function(data) {
diff --git a/test/parallel/test-repl-end-emits-exit.js b/test/parallel/test-repl-end-emits-exit.js
index e4bc4da78c142d..2c18b413d68c0f 100644
--- a/test/parallel/test-repl-end-emits-exit.js
+++ b/test/parallel/test-repl-end-emits-exit.js
@@ -1,15 +1,12 @@
 'use strict';
 var common = require('../common'),
     assert = require('assert'),
-    Stream = require('stream'),
     repl = require('repl'),
     terminalExit = 0,
     regularExit = 0;
 
-// create a dummy stream that does nothing
-var stream = new Stream();
-stream.write = stream.pause = stream.resume = function() {};
-stream.readable = stream.writable = true;
+// Create a dummy stream that does nothing
+const stream = new common.ArrayStream();
 
 function testTerminalMode() {
   var r1 = repl.start({
diff --git a/test/parallel/test-repl-options.js b/test/parallel/test-repl-options.js
index 5bc37d2d7117f3..ec3b144ec0ef77 100644
--- a/test/parallel/test-repl-options.js
+++ b/test/parallel/test-repl-options.js
@@ -1,15 +1,12 @@
 'use strict';
 var common = require('../common'),
     assert = require('assert'),
-    Stream = require('stream'),
     repl = require('repl');
 
 common.globalCheck = false;
 
-// create a dummy stream that does nothing
-var stream = new Stream();
-stream.write = stream.pause = stream.resume = function() {};
-stream.readable = stream.writable = true;
+// Create a dummy stream that does nothing
+const stream = new common.ArrayStream();
 
 // 1, mostly defaults
 var r1 = repl.start({
diff --git a/test/parallel/test-repl-reset-event.js b/test/parallel/test-repl-reset-event.js
index e6d4eed1385b10..0bd43dcd6c370e 100644
--- a/test/parallel/test-repl-reset-event.js
+++ b/test/parallel/test-repl-reset-event.js
@@ -4,12 +4,9 @@ common.globalCheck = false;
 
 var assert = require('assert');
 var repl = require('repl');
-var Stream = require('stream');
 
-// create a dummy stream that does nothing
-var dummy = new Stream();
-dummy.write = dummy.pause = dummy.resume = function() {};
-dummy.readable = dummy.writable = true;
+// Create a dummy stream that does nothing
+const dummy = new common.ArrayStream();
 
 function testReset(cb) {
   var r = repl.start({
diff --git a/test/parallel/test-repl-syntax-error-stack.js b/test/parallel/test-repl-syntax-error-stack.js
index 573059e8d9f34f..647d3e3569ce00 100644
--- a/test/parallel/test-repl-syntax-error-stack.js
+++ b/test/parallel/test-repl-syntax-error-stack.js
@@ -11,24 +11,12 @@ process.on('exit', () => {
   assert.strictEqual(found, true);
 });
 
-// A stream to push an array into a REPL
-function ArrayStream() {
-  this.run = function(data) {
-    data.forEach(line => {
-      this.emit('data', line + '\n');
-    });
-  };
-}
-util.inherits(ArrayStream, require('stream').Stream);
-ArrayStream.prototype.readable = true;
-ArrayStream.prototype.writable = true;
-ArrayStream.prototype.resume = function() {};
-ArrayStream.prototype.write = function(output) {
+common.ArrayStream.prototype.write = function(output) {
   if (/var foo bar;/.test(output))
     found = true;
 };
 
-const putIn = new ArrayStream();
+const putIn = new common.ArrayStream();
 const testMe = repl.start('', putIn);
 let file = path.resolve(__dirname, '../fixtures/syntax/bad_syntax');
 
diff --git a/test/parallel/test-repl-tab-complete-crash.js b/test/parallel/test-repl-tab-complete-crash.js
index 85ab0577eb8601..484580f1e72fe5 100644
--- a/test/parallel/test-repl-tab-complete-crash.js
+++ b/test/parallel/test-repl-tab-complete-crash.js
@@ -1,32 +1,19 @@
 'use strict';
 
-require('../common');
+const common = require('../common');
 const assert = require('assert');
 const util = require('util');
 const repl = require('repl');
 
 var referenceErrorCount = 0;
 
-// A stream to push an array into a REPL
-function ArrayStream() {
-  this.run = function(data) {
-    const self = this;
-    data.forEach(function(line) {
-      self.emit('data', line + '\n');
-    });
-  };
-}
-util.inherits(ArrayStream, require('stream').Stream);
-ArrayStream.prototype.readable = true;
-ArrayStream.prototype.writable = true;
-ArrayStream.prototype.resume = function() {};
-ArrayStream.prototype.write = function(msg) {
+common.ArrayStream.prototype.write = function(msg) {
   if (msg.startsWith('ReferenceError: ')) {
     referenceErrorCount++;
   }
 };
 
-const putIn = new ArrayStream();
+const putIn = new common.ArrayStream();
 const testMe = repl.start('', putIn);
 
 // https://github.com/nodejs/node/issues/3346
diff --git a/test/parallel/test-repl-tab-complete.js b/test/parallel/test-repl-tab-complete.js
index 1cb6e7791d3c2b..6bf7d5059d0116 100644
--- a/test/parallel/test-repl-tab-complete.js
+++ b/test/parallel/test-repl-tab-complete.js
@@ -20,23 +20,8 @@ process.on('exit', function() {
   assert.strictEqual(referenceErrors, expectedReferenceErrors);
 });
 
-// A stream to push an array into a REPL
-function ArrayStream() {
-  this.run = function(data) {
-    var self = this;
-    data.forEach(function(line) {
-      self.emit('data', line + '\n');
-    });
-  };
-}
-util.inherits(ArrayStream, require('stream').Stream);
-ArrayStream.prototype.readable = true;
-ArrayStream.prototype.writable = true;
-ArrayStream.prototype.resume = function() {};
-ArrayStream.prototype.write = function() {};
-
 var works = [['inner.one'], 'inner.o'];
-var putIn = new ArrayStream();
+const putIn = new common.ArrayStream();
 var testMe = repl.start('', putIn);
 
 // Some errors are passed to the domain, but do not callback