diff --git a/test/test.js b/test/test.js
index 9588da6..ea25f3e 100644
--- a/test/test.js
+++ b/test/test.js
@@ -7,7 +7,7 @@ var assert = require('assert'),
     sprintf = sprintfjs.sprintf
 
 describe('sprintfjs', function() {
-    var pi = 3.141592653589793
+    var pi = Math.PI
 
     it('should return formated strings for simple placeholders', function() {
         assert.equal('%', sprintf('%%'))