diff --git a/src/captured_trace.js b/src/captured_trace.js
index 102310a4b..ebfbe85c4 100644
--- a/src/captured_trace.js
+++ b/src/captured_trace.js
@@ -2,7 +2,7 @@
 module.exports = function() {
 var async = require("./async.js");
 var ASSERT = require("./assert.js");
-var inherits = require("./util.js").inherits;
+var util = require("./util.js");
 var bluebirdFramePattern =
     /[\\\/]bluebird[\\\/]js[\\\/](main|debug|zalgo|instrumented)/;
 var stackFramePattern = null;
@@ -18,7 +18,7 @@ function CapturedTrace(parent) {
     // there must be cycles
     if (length > 32) this.uncycle();
 }
-inherits(CapturedTrace, Error);
+util.inherits(CapturedTrace, Error);
 
 CapturedTrace.prototype.uncycle = function() {
     var length = this._length;
@@ -435,9 +435,7 @@ var captureStackTrace = (function stackDetection() {
 
 var fireDomEvent;
 var fireGlobalEvent = (function() {
-    if (typeof process !== "undefined" &&
-        typeof process.version === "string" &&
-        typeof window === "undefined") {
+    if (util.isNode) {
         return function(name, reason, promise) {
             if (name === REJECTION_HANDLED_EVENT) {
                 return process.emit(name, promise);
diff --git a/src/debuggability.js b/src/debuggability.js
index 429fe4e27..ea34a1544 100644
--- a/src/debuggability.js
+++ b/src/debuggability.js
@@ -7,13 +7,9 @@ var ASSERT = require("./assert.js");
 var canAttachTrace = util.canAttachTrace;
 var unhandledRejectionHandled;
 var possiblyUnhandledRejection;
-var debugging = __DEBUG__ || !!(
-    typeof process !== "undefined" &&
-    typeof process.execPath === "string" &&
-    typeof process.env === "object" &&
-    (process.env["BLUEBIRD_DEBUG"] ||
-        process.env["NODE_ENV"] === "development")
-);
+var debugging = __DEBUG__ || (util.isNode &&
+                    (!!process.env["BLUEBIRD_DEBUG"] ||
+                     process.env["NODE_ENV"] === "development"));
 
 Promise.prototype._ensurePossibleRejectionHandled = function () {
     this._setRejectionIsUnhandled();
diff --git a/src/promise.js b/src/promise.js
index 471e67039..80c6eddbb 100644
--- a/src/promise.js
+++ b/src/promise.js
@@ -37,7 +37,6 @@ var PromiseResolver = require("./promise_resolver.js");
 var nodebackForPromise = PromiseResolver._nodebackForPromise;
 var errorObj = util.errorObj;
 var tryCatch = util.tryCatch;
-
 function Promise(resolver) {
     if (typeof resolver !== "function") {
         throw new TypeError(CONSTRUCT_ERROR_ARG);
diff --git a/src/schedule.js b/src/schedule.js
index 0322d9ab3..54d294d36 100644
--- a/src/schedule.js
+++ b/src/schedule.js
@@ -1,6 +1,6 @@
 "use strict";
 var schedule;
-if (typeof process === "object" && typeof process.version === "string") {
+if (require("./util.js").isNode) {
     var version = process.version.split(".").map(Number);
     schedule = (version[0] === 0 && version[1] > 10) || (version[0] > 0)
         ? global.setImmediate : process.nextTick;
diff --git a/src/util.js b/src/util.js
index 608c37d6d..e824feb42 100644
--- a/src/util.js
+++ b/src/util.js
@@ -269,7 +269,9 @@ var ret = {
     ensureErrorObject: ensureErrorObject,
     originatesFromRejection: originatesFromRejection,
     markAsOriginatingFromRejection: markAsOriginatingFromRejection,
-    classString: classString
+    classString: classString,
+    isNode: typeof process !== "undefined" &&
+        classString(process).toLowerCase() === "[object process]"
 };
 try {throw new Error(); } catch (e) {ret.lastLineError = e;}
 module.exports = ret;