diff --git a/lib/sauce_launcher.js b/lib/sauce_launcher.js
index b936376..07f5d24 100644
--- a/lib/sauce_launcher.js
+++ b/lib/sauce_launcher.js
@@ -10,8 +10,8 @@ var SauceLauncher = function(args, sauceConnect, /* config.sauceLabs */ config,
 
   config = config || {};
 
-  var username = process.env.SAUCE_USERNAME || args.username || config.username;
-  var accessKey = process.env.SAUCE_ACCESS_KEY || args.accessKey || config.accessKey;
+  var username = args.username || config.username || process.env.SAUCE_USERNAME;
+  var accessKey = args.accessKey || config.accessKey || process.env.SAUCE_ACCESS_KEY;
   var tunnelIdentifier = args.tunnelIdentifier || config.tunnelIdentifier;
   var browserName = args.browserName + (args.version ? ' ' + args.version : '') +
                     (args.platform ? ' (' + args.platform + ')' : '');