diff --git a/src/lib/bootstrap.js b/src/lib/bootstrap.js
index e233ccd67..358177a19 100644
--- a/src/lib/bootstrap.js
+++ b/src/lib/bootstrap.js
@@ -13,6 +13,7 @@ import {parse_address} from './utils';
 
 import type {Callback} from '@verdaccio/types';
 import type {$Application} from 'express';
+import {DEFAULT_PORT} from './constants';
 
 const logger = require('./logger');
 
@@ -37,7 +38,7 @@ export function getListListenAddresses(argListen: string, configListen: mixed) {
   } else if (configListen) {
     addresses = [configListen];
   } else {
-    addresses = ['4873'];
+    addresses = [DEFAULT_PORT];
   }
   addresses = addresses.map(function(addr) {
     const parsedAddr = parse_address(addr);
diff --git a/src/lib/constants.js b/src/lib/constants.js
index 8121a7a06..c4281a2c3 100644
--- a/src/lib/constants.js
+++ b/src/lib/constants.js
@@ -1,5 +1,8 @@
 // @flow
 
+export const DEFAULT_PORT = '4873';
+export const DEFAULT_DOMAIN = 'localhost';
+
 export const HEADERS = {
   JSON: 'application/json',
   JSON_CHARSET: 'application/json; charset=utf-8',
diff --git a/src/lib/utils.js b/src/lib/utils.js
index 5c87cd2f1..18669b2ae 100644
--- a/src/lib/utils.js
+++ b/src/lib/utils.js
@@ -1,16 +1,16 @@
 // @flow
-
-import {generateGravatarUrl} from '../utils/user';
+import _ from 'lodash';
+import fs from 'fs';
 import assert from 'assert';
 import semver from 'semver';
 import YAML from 'js-yaml';
 import URL from 'url';
-import fs from 'fs';
-import _ from 'lodash';
 import asciidoctor from 'asciidoctor.js';
 import createError from 'http-errors';
 import marked from 'marked';
-import {HTTP_STATUS, API_ERROR} from './constants';
+
+import {HTTP_STATUS, API_ERROR, DEFAULT_PORT, DEFAULT_DOMAIN} from './constants';
+import {generateGravatarUrl} from '../utils/user';
 
 import type {Package} from '@verdaccio/types';
 import type {$Request} from 'express';
@@ -219,8 +219,8 @@ function parse_address(urlAddress: any) {
   if (urlPattern) {
     return {
       proto: urlPattern[2] || 'http',
-      host: urlPattern[6] || urlPattern[7] || 'localhost',
-      port: urlPattern[8] || '4873',
+      host: urlPattern[6] || urlPattern[7] || DEFAULT_DOMAIN,
+      port: urlPattern[8] || DEFAULT_PORT,
     };
   }
 
diff --git a/test/unit/api/cli.spec.js b/test/unit/api/cli.spec.js
index 891abe3df..3344d01b5 100644
--- a/test/unit/api/cli.spec.js
+++ b/test/unit/api/cli.spec.js
@@ -4,6 +4,7 @@ import _ from 'lodash';
 import startServer from '../../../src/index';
 import {getListListenAddresses} from '../../../src/lib/bootstrap';
 import config from '../partials/config/index';
+import {DEFAULT_DOMAIN, DEFAULT_PORT} from '../../../src/lib/constants';
 
 require('../../../src/lib/logger').setup([]);
 
@@ -42,12 +43,12 @@ describe('startServer via API', () => {
   });
 
   describe('getListListenAddresses test', () => {
-    test('should return by default 4873', () => {
+    test(`should return by default ${DEFAULT_PORT}`, () => {
       const addrs = getListListenAddresses()[0];
 
       expect(addrs.proto).toBe('http');
-      expect(addrs.host).toBe('localhost');
-      expect(addrs.port).toBe('4873');
+      expect(addrs.host).toBe(DEFAULT_DOMAIN);
+      expect(addrs.port).toBe(DEFAULT_PORT);
     });
 
     test('should return a list of address and no cli argument provided', () => {
diff --git a/test/unit/api/listen_addr.spec.js b/test/unit/api/listen_addr.spec.js
index de46e0650..25eabce26 100644
--- a/test/unit/api/listen_addr.spec.js
+++ b/test/unit/api/listen_addr.spec.js
@@ -1,39 +1,44 @@
 import _ from 'lodash';
 import {parse_address as parse} from '../../../src/lib/utils';
+import {DEFAULT_DOMAIN, DEFAULT_PORT} from '../../../src/lib/constants';
 
 describe('Parse listen address', () => {
   function addTest(uri, proto, host, port) {
-    test(uri, () => {
+    test(`should parse ${uri}`, () => {
+      const parsed = parse(uri);
+
       if (_.isNull(proto)) {
-        expect(parse(uri)).toBeNull();
+        expect(parsed).toBeNull();
       } else if (port) {
-        expect(parse(uri)).toEqual({
+        expect(parsed).toEqual({
           proto,
           host,
           port,
         });
       } else {
-        expect(parse(uri)).toEqual({
+        expect(parsed).toEqual({
           proto,
-          host,
+          path: host,
         });
       }
     });
   }
 
-  addTest('4873', 'http', 'localhost', '4873');
-  addTest(':4873', 'http', 'localhost', '4873');
-  addTest('blah:4873', 'http', 'blah', '4873');
-  addTest('http://:4873', 'http', 'localhost', '4873');
-  addTest('https::4873', 'https', 'localhost', '4873');
-  addTest('https:blah:4873', 'https', 'blah', '4873');
-  addTest('https://blah:4873/', 'https', 'blah', '4873');
-  addTest('[::1]:4873', 'http', '::1', '4873');
-  addTest('https:[::1]:4873', 'https', '::1', '4873');
+  addTest(DEFAULT_PORT, 'http', DEFAULT_DOMAIN, DEFAULT_PORT);
+  addTest(':4873', 'http', DEFAULT_DOMAIN, DEFAULT_PORT);
+  addTest('blah:4873', 'http', 'blah', DEFAULT_PORT);
+  addTest('http://:4873', 'http', DEFAULT_DOMAIN, DEFAULT_PORT);
+  addTest('https::4873', 'https', DEFAULT_DOMAIN, DEFAULT_PORT);
+  addTest('https:blah:4873', 'https', 'blah', DEFAULT_PORT);
+  addTest('https://blah:4873/', 'https', 'blah', DEFAULT_PORT);
+  addTest('[::1]:4873', 'http', '::1', DEFAULT_PORT);
+  addTest('https:[::1]:4873', 'https', '::1', DEFAULT_PORT);
 
   addTest('unix:/tmp/foo.sock', 'http', '/tmp/foo.sock');
   addTest('http:unix:foo.sock', 'http', 'foo.sock');
   addTest('https://unix:foo.sock', 'https', 'foo.sock');
+  addTest('https://unix:foo.sock:34', 'https', 'foo.sock:34');
+  addTest('http://foo.sock:34', 'http', 'foo.sock', '34');
 
   addTest('blah', null);
   addTest('blah://4873', null);