diff --git a/bin/_mocha b/bin/_mocha
old mode 100644
new mode 100755
diff --git a/lib/runner.js b/lib/runner.js
index 09ed198313..58f20a90a2 100644
--- a/lib/runner.js
+++ b/lib/runner.js
@@ -58,19 +58,7 @@ function Runner(suite) {
   this.on('test end', function(test){ self.checkGlobals(test); });
   this.on('hook end', function(hook){ self.checkGlobals(hook); });
   this.grep(/.*/);
-  var extraGlobals = [];
-  if (typeof(process) === 'object' &&
-      typeof(process.versions) === 'object' &&
-      typeof(process.versions.node) === 'string') {
-    var nodeVersion = process.versions.node.split('.').reduce(function(a, v) {
-      return a << 8 | v;
-    });
-    // 'errno' was renamed to process._errno in v0.9.11.
-    if (nodeVersion < 0x00090B) {
-      extraGlobals.push('errno');
-    }
-  }
-  this.globals(this.globalProps().concat(extraGlobals));
+  this.globals(this.globalProps().concat(extraGlobals()));
 }
 
 /**
@@ -650,3 +638,28 @@ function filterLeaks(ok, globals) {
     return matched.length == 0 && (!global.navigator || 'onerror' !== key);
   });
 }
+
+/**
+ * Array of globals dependent on the environment.
+ *
+ * @return {Array}
+ * @api private
+ */
+
+ function extraGlobals() {
+  if (typeof(process) === 'object' &&
+      typeof(process.version) === 'string') {
+
+    var nodeVersion = process.version.split('.').reduce(function(a, v) {
+      return a << 8 | v;
+    });
+
+    // 'errno' was renamed to process._errno in v0.9.11.
+
+    if (nodeVersion < 0x00090B) {
+      return ['errno'];
+    }
+  }
+
+  return [];
+ }
diff --git a/mocha.js b/mocha.js
index 78947c6269..c8c9b9ffdf 100644
--- a/mocha.js
+++ b/mocha.js
@@ -4404,19 +4404,8 @@ function Runner(suite) {
   this.on('test end', function(test){ self.checkGlobals(test); });
   this.on('hook end', function(hook){ self.checkGlobals(hook); });
   this.grep(/.*/);
-  var extraGlobals = [];
-  if (typeof(process) === 'object' &&
-      typeof(process.versions) === 'object' &&
-      typeof(process.versions.node) === 'string') {
-    var nodeVersion = process.versions.node.split('.').reduce(function(a, v) {
-      return a << 8 | v;
-    });
-    // 'errno' was renamed to process._errno in v0.9.11.
-    if (nodeVersion < 0x00090B) {
-      extraGlobals.push('errno');
-    }
-  }
-  this.globals(this.globalProps().concat(extraGlobals));
+  console.log(extraGlobals());
+  this.globals(this.globalProps().concat(extraGlobals()));
 }
 
 /**
@@ -5001,6 +4990,31 @@ function filterLeaks(ok, globals) {
   });
 }
 
+/**
+ * Array of globals dependent on the environment.
+ *
+ * @return {Array}
+ * @api private
+ */
+
+ function extraGlobals() {
+  if (typeof(process) === 'object' &&
+      typeof(process.version) === 'string') {
+
+    var nodeVersion = process.version.split('.').reduce(function(a, v) {
+      return a << 8 | v;
+    });
+
+    // 'errno' was renamed to process._errno in v0.9.11.
+
+    if (nodeVersion < 0x00090B) {
+      return ['errno'];
+    }
+  }
+
+  return [];
+ }
+
 }); // module: runner.js
 
 require.register("suite.js", function(module, exports, require){