diff --git a/example/mocha.js b/example/mocha.js
index c959d0d..dcd452f 100644
--- a/example/mocha.js
+++ b/example/mocha.js
@@ -2,6 +2,8 @@
 const assert = require('assert')
 const commandLineArgs = require('../')
 
+/* enable partial parsing to prevent exceptions being thrown
+if the user sets undefined, mocha-specific options (e.g. --no-colors) */
 const options = commandLineArgs({ name: 'value', type: Number }, { partial: true })
 
 describe('Array', function () {
diff --git a/example/validate.js b/example/validate.js
index 6bdc460..af06c56 100644
--- a/example/validate.js
+++ b/example/validate.js
@@ -1,35 +1,28 @@
 /*
   command-line-args parses the command line but does not validate what was collected.
-  This is one method of testing the values received suit your taste.
+  This is an example of how values collected can be validated.
 */
 
 'use strict'
-var commandLineArgs = require('../')
-var testValue = require('test-value')
-var fs = require('fs')
+const commandLineArgs = require('../')
+const fs = require('fs')
 
-var optionDefinitions = [
-  { name: 'help', type: Boolean },
+const optionDefinitions = [
+  { name: 'help', alias: 'h', type: Boolean },
   { name: 'files', type: String, multiple: true, defaultOption: true },
   { name: 'log-level', type: String }
 ]
 
-var options = commandLineArgs(optionDefinitions)
+const options = commandLineArgs(optionDefinitions)
 
-/* all supplied files should exist and --log-level should be one from the list */
-var correctUsageForm1 = {
-  files: function (files) {
-    return files && files.length && files.every(fs.existsSync)
-  },
-  'log-level': [ 'info', 'warn', 'error', undefined ]
-}
-
-/* passing a single --help flag is also valid */
-var correctUsageForm2 = {
-  help: true
-}
-
-/* test the options for usage forms 1 or 2 */
-var valid = testValue(options, [ correctUsageForm1, correctUsageForm2 ])
+const valid =
+  options.help ||
+  (
+    /* all supplied files should exist and --log-level should be one from the list */
+    options.files &&
+    options.files.length &&
+    options.files.every(fs.existsSync) &&
+    [ 'info', 'warn', 'error', undefined ].includes(options['log-level'])
+  )
 
 console.log('your options are', valid ? 'valid' : 'invalid', options)
diff --git a/package.json b/package.json
index a87c73d..4b03f9f 100644
--- a/package.json
+++ b/package.json
@@ -28,8 +28,7 @@
   "devDependencies": {
     "coveralls": "^2.11.15",
     "jsdoc-to-markdown": "^2.0.1",
-    "test-runner": "^0.3.0",
-    "test-value": "^2.1.0"
+    "test-runner": "^0.3.0"
   },
   "dependencies": {
     "array-back": "^1.0.4",
diff --git a/test/unknown-options.js b/test/unknown-options.js
index e945a4e..abfc8ba 100644
--- a/test/unknown-options.js
+++ b/test/unknown-options.js
@@ -33,7 +33,7 @@ runner.test('unknown option: defaultOption 2', function () {
   const definitions = [
     { name: 'files', type: String, defaultOption: true, multiple: true },
     { name: 'one', type: Boolean },
-    { name: 'two', alias: 't', defaultValue: 2 },
+    { name: 'two', alias: 't', defaultValue: 2 }
   ]
   const argv = [ 'file1', '--one', 'file2', '-t', '--two=3', 'file3', '-ab' ]
   const options = commandLineArgs(definitions, { argv, partial: true })