diff --git a/test/common/inspector-helper.js b/test/common/inspector-helper.js
index 666624490e79a9e..6a54446ef37039c 100644
--- a/test/common/inspector-helper.js
+++ b/test/common/inspector-helper.js
@@ -393,7 +393,7 @@ class NodeInstance extends EventEmitter {
     console.log('[test]', `Testing ${path}`);
     const headers = hostHeaderValue ? { 'Host': hostHeaderValue } : null;
     return this.portPromise.then((port) => new Promise((resolve, reject) => {
-      const req = http.get({ host, port, path, headers }, (res) => {
+      const req = http.get({ host, port, family: 4, path, headers }, (res) => {
         let response = '';
         res.setEncoding('utf8');
         res
@@ -419,6 +419,7 @@ class NodeInstance extends EventEmitter {
     const port = await this.portPromise;
     return http.get({
       port,
+      family: 4,
       path: parseURL(devtoolsUrl).path,
       headers: {
         'Connection': 'Upgrade',
diff --git a/test/parallel/test-cluster-message.js b/test/parallel/test-cluster-message.js
index 45854c77a5a347e..e49bee6bf0a409c 100644
--- a/test/parallel/test-cluster-message.js
+++ b/test/parallel/test-cluster-message.js
@@ -111,7 +111,7 @@ if (cluster.isWorker) {
   // When a TCP server is listening in the worker connect to it
   worker.on('listening', function(address) {
 
-    client = net.connect(address.port, function() {
+    client = net.connect({ port: address.port, family: 4 }, function() {
       // Send message to worker.
       worker.send('message from primary');
     });
diff --git a/test/parallel/test-http-localaddress.js b/test/parallel/test-http-localaddress.js
index e237c3bff1ac848..a0e4bb80a3f8c28 100644
--- a/test/parallel/test-http-localaddress.js
+++ b/test/parallel/test-http-localaddress.js
@@ -42,6 +42,7 @@ const server = http.createServer((req, res) => {
 server.listen(0, '127.0.0.1', () => {
   const options = { host: 'localhost',
                     port: server.address().port,
+                    family: 4,
                     path: '/',
                     method: 'GET',
                     localAddress: '127.0.0.2' };
diff --git a/test/parallel/test-http-upgrade-client.js b/test/parallel/test-http-upgrade-client.js
index 8fe756f469f09a3..7b5dde540746a6f 100644
--- a/test/parallel/test-http-upgrade-client.js
+++ b/test/parallel/test-http-upgrade-client.js
@@ -68,6 +68,7 @@ server.listen(0, '127.0.0.1', common.mustCall(function() {
   headers.forEach(function(h) {
     const req = http.get({
       port: port,
+      family: 4,
       headers: h
     });
     let sawUpgrade = false;
diff --git a/test/parallel/test-http2-connect-options.js b/test/parallel/test-http2-connect-options.js
index 0c7ec807b84d38d..233ced016974e27 100644
--- a/test/parallel/test-http2-connect-options.js
+++ b/test/parallel/test-http2-connect-options.js
@@ -22,7 +22,7 @@ const server = http2.createServer((req, res) => {
 });
 
 server.listen(0, '127.0.0.1', common.mustCall(() => {
-  const options = { localAddress: '127.0.0.2' };
+  const options = { localAddress: '127.0.0.2', family: 4 };
 
   const client = http2.connect(
     'http://localhost:' + server.address().port,
diff --git a/test/parallel/test-https-localaddress.js b/test/parallel/test-https-localaddress.js
index 0ac8414b2d4b357..0de0974dc69b04f 100644
--- a/test/parallel/test-https-localaddress.js
+++ b/test/parallel/test-https-localaddress.js
@@ -52,6 +52,7 @@ server.listen(0, '127.0.0.1', function() {
   const options = {
     host: 'localhost',
     port: this.address().port,
+    family: 4,
     path: '/',
     method: 'GET',
     localAddress: '127.0.0.2',
diff --git a/test/parallel/test-net-dns-lookup.js b/test/parallel/test-net-dns-lookup.js
index 53052de716ee9e1..1ac6525c00d85bd 100644
--- a/test/parallel/test-net-dns-lookup.js
+++ b/test/parallel/test-net-dns-lookup.js
@@ -29,8 +29,8 @@ const server = net.createServer(function(client) {
   server.close();
 });
 
-server.listen(0, '127.0.0.1', common.mustCall(function() {
-  net.connect(this.address().port, 'localhost')
+server.listen(0, common.localhostIPv4, common.mustCall(function() {
+  net.connect({ port: this.address().port, host: 'localhost', family: 4 })
     .on('lookup', common.mustCall(function(err, ip, type, host) {
       assert.strictEqual(err, null);
       assert.strictEqual(ip, '127.0.0.1');
diff --git a/test/parallel/test-net-remote-address-port.js b/test/parallel/test-net-remote-address-port.js
index 094206f85df34da..cc14d0c951167d9 100644
--- a/test/parallel/test-net-remote-address-port.js
+++ b/test/parallel/test-net-remote-address-port.js
@@ -28,7 +28,7 @@ const net = require('net');
 let conns_closed = 0;
 
 const remoteAddrCandidates = [ common.localhostIPv4 ];
-if (common.hasIPv6) remoteAddrCandidates.push('::ffff:127.0.0.1');
+if (common.hasIPv6) remoteAddrCandidates.push('::1', '::ffff:127.0.0.1');
 
 const remoteFamilyCandidates = ['IPv4'];
 if (common.hasIPv6) remoteFamilyCandidates.push('IPv6');
diff --git a/test/parallel/test-tcp-wrap-listen.js b/test/parallel/test-tcp-wrap-listen.js
index 72981b683ccea3f..e2e70b627238dd9 100644
--- a/test/parallel/test-tcp-wrap-listen.js
+++ b/test/parallel/test-tcp-wrap-listen.js
@@ -14,7 +14,9 @@ const {
 
 const server = new TCP(TCPConstants.SOCKET);
 
-const r = server.bind('0.0.0.0', 0);
+const r = (common.hasIPv6 ?
+           server.bind6('::', 0) :
+           server.bind('0.0.0.0', 0));
 assert.strictEqual(r, 0);
 let port = {};
 server.getsockname(port);
diff --git a/test/parallel/test-timers-socket-timeout-removes-other-socket-unref-timer.js b/test/parallel/test-timers-socket-timeout-removes-other-socket-unref-timer.js
index ccecfe4c63a6a19..5fcd4fa4fee4bc3 100644
--- a/test/parallel/test-timers-socket-timeout-removes-other-socket-unref-timer.js
+++ b/test/parallel/test-timers-socket-timeout-removes-other-socket-unref-timer.js
@@ -32,12 +32,12 @@ server.listen(0, common.localhostIPv4, common.mustCall(() => {
   const countdown = new Countdown(2, () => server.close());
 
   {
-    const client = net.connect({ port: server.address().port });
+    const client = net.connect({ port: server.address().port, family: 4 });
     client.on('end', () => countdown.dec());
   }
 
   {
-    const client = net.connect({ port: server.address().port });
+    const client = net.connect({ port: server.address().port, family: 4 });
     client.on('end', () => countdown.dec());
   }
 }));
diff --git a/test/parallel/test-tls-client-getephemeralkeyinfo.js b/test/parallel/test-tls-client-getephemeralkeyinfo.js
index 73ac215102ddbba..36502da30af8dd8 100644
--- a/test/parallel/test-tls-client-getephemeralkeyinfo.js
+++ b/test/parallel/test-tls-client-getephemeralkeyinfo.js
@@ -40,6 +40,7 @@ function test(size, type, name, cipher) {
   server.listen(0, '127.0.0.1', common.mustCall(() => {
     const client = tls.connect({
       port: server.address().port,
+      family: 4,
       rejectUnauthorized: false
     }, common.mustCall(function() {
       const ekeyinfo = client.getEphemeralKeyInfo();
diff --git a/test/parallel/test-tls-client-mindhsize.js b/test/parallel/test-tls-client-mindhsize.js
index a6fbc67bd883615..375501829508d7a 100644
--- a/test/parallel/test-tls-client-mindhsize.js
+++ b/test/parallel/test-tls-client-mindhsize.js
@@ -41,6 +41,7 @@ function test(size, err, next) {
     const client = tls.connect({
       minDHSize: 2048,
       port: this.address().port,
+      family: 4,
       rejectUnauthorized: false
     }, function() {
       nsuccess++;
diff --git a/test/parallel/test-tls-wrap-econnreset-localaddress.js b/test/parallel/test-tls-wrap-econnreset-localaddress.js
index 30d3a8873fa8f05..b51ddb29ba8b550 100644
--- a/test/parallel/test-tls-wrap-econnreset-localaddress.js
+++ b/test/parallel/test-tls-wrap-econnreset-localaddress.js
@@ -16,6 +16,7 @@ const server = net.createServer((c) => {
   let errored = false;
   tls.connect({
     port: port,
+    family: 4,
     localAddress: common.localhostIPv4
   }, common.localhostIPv4)
     .once('error', common.mustCall((e) => {
diff --git a/test/sequential/test-https-connect-localport.js b/test/sequential/test-https-connect-localport.js
index e703fb2287d3692..4062a8ad4e6d5d4 100644
--- a/test/sequential/test-https-connect-localport.js
+++ b/test/sequential/test-https-connect-localport.js
@@ -23,7 +23,7 @@ const assert = require('assert');
       host: 'localhost',
       pathname: '/',
       port,
-      family: 4,
+      //family: 4,
       localPort: common.PORT,
       rejectUnauthorized: false,
     }, common.mustCall(() => {
diff --git a/test/sequential/test-inspector-open.js b/test/sequential/test-inspector-open.js
index 190a99e7282e525..847f0ab6926f670 100644
--- a/test/sequential/test-inspector-open.js
+++ b/test/sequential/test-inspector-open.js
@@ -80,7 +80,7 @@ function reopenAfterClose(msg) {
 }
 
 function ping(port, callback) {
-  net.connect(port)
+  net.connect({ port, family: 4 })
     .on('connect', function() { close(this); })
     .on('error', function(err) { close(this, err); });
 
diff --git a/test/sequential/test-net-connect-local-error.js b/test/sequential/test-net-connect-local-error.js
index 030c4de750cb4d4..7fa33b075975475 100644
--- a/test/sequential/test-net-connect-local-error.js
+++ b/test/sequential/test-net-connect-local-error.js
@@ -9,6 +9,7 @@ const expectedErrorCodes = ['ECONNREFUSED', 'EADDRINUSE'];
 
 const optionsIPv4 = {
   port: common.PORT,
+  family: 4,
   localPort: common.PORT + 1,
   localAddress: common.localhostIPv4
 };
@@ -16,6 +17,7 @@ const optionsIPv4 = {
 const optionsIPv6 = {
   host: '::1',
   port: common.PORT + 2,
+  family: 6,
   localPort: common.PORT + 3,
   localAddress: '::1',
 };