diff --git a/test/convert-images-spec.js b/test/convert-images-spec.js
index de1d9bd..9d10037 100644
--- a/test/convert-images-spec.js
+++ b/test/convert-images-spec.js
@@ -2,11 +2,13 @@ var fs = require('fs');
 var PNG = require('../lib/png').PNG;
 var test = require('tape');
 
+var noLargeOption = process.argv.indexOf("nolarge") >= 0;
+
 fs.readdir(__dirname + '/in/', function (err, files) {
   if (err) throw err;
 
   files = files.filter(function (file) {
-    return ((process.argv[3] || "").indexOf("nolarge") < 0 || !file.match(/large/i)) && Boolean(file.match(/\.png$/i));
+    return (noLargeOption || !file.match(/large/i)) && Boolean(file.match(/\.png$/i));
   });
 
   console.log("Converting images");