Use has instead of a homegrown version of the same.

Author: ljharb

lib/results.js

@@ -3,7 +3,7 @@ var inherits = require('inherits');
 var through = require('through');
 var resumer = require('resumer');
 var inspect = require('object-inspect');
-var hasOwn = Object.prototype.hasOwnProperty;
+var has = require('has');
 var regexpTest = RegExp.prototype.test;
 var yamlIndicators = /\:|\-|\?/;
 var nextTick = typeof setImmediate !== 'undefined'
@@ -186,10 +186,6 @@ function getNextTest (results) {
     } while (results.tests.length !== 0)
 }
 
-function has (obj, prop) {
-    return hasOwn.call(obj, prop);
-}
-
 function invalidYaml (str) {
     return regexpTest.call(yamlIndicators, str);
 }

lib/test.js

@@ -3,6 +3,7 @@ var defined = require('defined');
 var path = require('path');
 var inherits = require('inherits');
 var EventEmitter = require('events').EventEmitter;
+var has = require('has');
 
 module.exports = Test;
 
@@ -482,11 +483,6 @@ Test.prototype.doesNotThrow = function (fn, expected, msg, extra) {
     });
 };
 
-var hasOwn = Object.prototype.hasOwnProperty;
-function has (obj, prop) {
-    return hasOwn.call(obj, prop);
-}
-
 Test.skip = function (name_, _opts, _cb) {
     var args = getTestArgs.apply(null, arguments);
     args.opts.skip = true;

package.json

@@ -12,6 +12,7 @@
     "deep-equal": "~1.0.0",
     "defined": "~0.0.0",
     "glob": "~5.0.3",
+    "has": "~1.0.1",
     "inherits": "~2.0.1",
     "object-inspect": "~1.0.0",
     "resumer": "~0.0.0",