diff --git a/js/tests/e4x/Regress/regress-354998.js b/js/tests/e4x/Regress/regress-354998.js
index 38b63ad6000..6612ad5ebd6 100755
--- a/js/tests/e4x/Regress/regress-354998.js
+++ b/js/tests/e4x/Regress/regress-354998.js
@@ -77,7 +77,7 @@ var time2 = test();
 for (var i = 0; i != 1000*1000; ++i)
     delete Object.prototype[i];
 
-if (time1 * 10 < time2) {
+if (time1 * 10 + 1 < time2) {
   throw "Assigns to Object.prototype increased time of XML enumeration from "+
         time1+"ms to "+time2+"ms";
 }