diff --git a/.travis.yml b/.travis.yml
index f776680..58b3e94 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,8 @@ node_js:
   - "6"
   - "7"
   - "8"
+  - "9"
+  - "10"
 
 install:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update && brew install nmap; npm install; node examples/discover.js; npm test; fi
diff --git a/lib/classes/validation.js b/lib/classes/validation.js
index 6fc6ffb..55043dd 100644
--- a/lib/classes/validation.js
+++ b/lib/classes/validation.js
@@ -48,7 +48,6 @@ class validation {
        * Regex for matching port ranges
        * @ref http://stackoverflow.com/a/21075138/901697
        */
-      //ports: /^(?:(?:^|[-,])(?:[1-9][0-9]{0,3}|[1-5][0-9]{4}|6(?:[0-4][0-9]{3}|5(?:[0-4][0-9]{2}|5(?:[0-2][0-9]|3[0-5])))))+$/,
       ports: /\d{1,6}(?:-\d+)?/g,
 
       /**
@@ -99,13 +98,14 @@ class validation {
    */
   init(opts, cb) {
     const scope = this;
-    const errors = [];
+    let errors = [];
+    let result;
 
     scope.exists(opts.nmap, (result) => {
       if (!result) {
 
         // Try full path vs. process.env.PATH
-        fs.access(opts.nmap, fs.constants.F_OK|fs.constants.X_OK, e => {
+        fs.access(opts.nmap, fs.constants.F_OK | fs.constants.X_OK, e => {
           if (e)
             return cb(scope.messages.path);
         });
@@ -113,10 +113,10 @@ class validation {
     });
 
     if (opts.blocksize > 128)
-     return cb(scope.messages.block);
+      return cb(scope.messages.block);
 
-    if ((!opts.range) || (!/array|object/.test(typeof(opts.range))) ||
-        (opts.range.length === 0))
+    if ((!opts.range) || (!/array|object/.test(typeof (opts.range))) ||
+      (opts.range.length === 0))
       return cb(scope.messages.range);
 
     if (opts.range.length >= 1) {
@@ -131,7 +131,8 @@ class validation {
       errors.push(new Error(scope.messages.port));
 
     if (opts.ports) {
-      if (!scope.patterns.ports.test(opts.ports))
+      result = opts.ports.match(scope.patterns.ports).join(",");
+      if (result == "")
         return cb(scope.messages.port);
     }
 
@@ -151,13 +152,14 @@ class validation {
   verify(host, cb) {
 
     if (this.test(this.patterns.hostname, host) ||
-        this.test(this.patterns.IPv4, host) ||
-        this.test(this.patterns.IPv6, host) ||
-        this.test(this.patterns.IPv4CIDR, host) ||
-        this.test(this.patterns.IPv6CIDR, host) ||
-			  this.test(this.patterns.IPv4Range, host)) {
+      this.test(this.patterns.IPv4, host) ||
+      this.test(this.patterns.IPv6, host) ||
+      this.test(this.patterns.IPv4CIDR, host) ||
+      this.test(this.patterns.IPv6CIDR, host) ||
+      this.test(this.patterns.IPv4Range, host)) {
       return cb(null, true);
-    } else {
+    }
+    else {
       return cb(`Supplied host (${host}) did not pass validation.
         ${this.messages.range}`);
     }
@@ -178,6 +180,20 @@ class validation {
   }
 
 
+  /**
+   * @function match
+   * Match specified regex test on string and return array of results
+   *
+   * @param {Object} regex - Regex test case
+   * @param {String} str - String to perform test on
+   *
+   * @returns {String}
+   */
+  match(regex, str) {
+    return regex.match(str);
+  }
+
+
   /**
    * @function exists
    * Binary file tests
diff --git a/test/errors.js b/test/errors.js
deleted file mode 100644
index 69ac90e..0000000
--- a/test/errors.js
+++ /dev/null
@@ -1,105 +0,0 @@
-/*!
- * libnmap
- * Copyright(c) 2013-2018 Jason Gerfen <jason.gerfen@gmail.com>
- * License: MIT
- */
-
-'use strict'
-
-const nmap = require('../');
-const timeout = 1024 * 1024;
-const chai = require('chai');
-const should = chai.should();
-const expect = chai.expect;
-let opts;
-
-
-describe('nmap', function() {
-
-  context('error handling', function() {
-
-    this.timeout(timeout);
-
-    it('missing nmap binary', function(done) {
-      opts = {
-        nmap: 'ping-pong'
-      };
-      nmap.scan(opts, function(err, report) {
-        should.exist(err);
-        should.not.exist(report);
-        done();
-      });
-    });
-
-    it('invalid host range', function(done) {
-      opts = {
-        range: ['10.0.5.256']
-      };
-      nmap.scan(opts, function(err, report) {
-        should.exist(err);
-        should.not.exist(report);
-        done();
-      });
-    });
-
-    it('invalid ip range', function(done) {
-      opts = {
-        range: ['10.0.2.5-256']
-      };
-      nmap.scan(opts, function(err, report) {
-        should.exist(err);
-        should.not.exist(report);
-        done();
-      });
-    });
-
-    it('invalid CIDR range', function(done) {
-      opts = {
-        range: ['256.128.0/17']
-      };
-      nmap.scan(opts, function(err, report) {
-        should.exist(err);
-        should.not.exist(report);
-        done();
-      });
-    });
-
-    it('invalid port range', function(done) {
-      opts = {
-        ports: '1,5-40,1024,-90'
-      };
-      nmap.scan(opts, function(err, report) {
-        should.exist(err);
-        should.not.exist(report);
-        done();
-      });
-    });
-
-    it('invalid flag options', function(done) {
-      opts = {
-        range: ['localhost'],
-        flags: [
-          '-sV', // Open port to determine service (i.e. FTP, SSH etc)
-          '-O', // OS finger printing (requires elevated privileges)
-          '-sC', // Enables the nmap scripts (all) against each host (requires elevated privileges)
-        ]
-      };
-      nmap.scan(opts, function(err, report) {
-        should.exist(err);
-        should.not.exist(report);
-        done();
-      });
-    });
-
-    it('unspecified range', function(done) {
-      opts = {
-        range: []
-      };
-      nmap.scan(opts, function(err, report) {
-        should.exist(err);
-        should.not.exist(report);
-        done();
-      });
-    });
-  });
-});