Test is not working, even though requirement is fulfilled

[itsbillyy]

Challenge Find the Longest Word in a String has an issue.
User Agent is: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36.
Please describe how to reproduce this issue, and include links to screenshots if possible.
Test for the third dot point (findLongestWord("May the force be with you") should return 5.) does not tick even though the output satisfies the requirement.

My code:

var array = [];
var z = 0;
function findLongestWord(str) {
  array = str.split(' ');
  var newArray = array.map(function(val){
    return val.length;
  });
  for (i = 0; i <= newArray.length; i++) {
    if (newArray[i] > z) {
      z = newArray[i];
    }
  }
  return z;
}

findLongestWord("May the force be with you");

[erictleung]

@itsbillyy same issue as #11832. Move your global variables within your function and you should pass the challenge. Happy coding!