diff --git a/test.html b/test.html
index bd59b07..dd878e7 100644
--- a/test.html
+++ b/test.html
@@ -21,6 +21,7 @@ const questions = [
 ];
 
 let questionnum = 0;
+let countInterval = null;
 
 function paddedFormat(num) {
   return num < 10 ? '0' + num : num;
@@ -31,7 +32,8 @@ function startCountDown(duration, element) {
   let min = 0;
   let sec = 0;
 
-  let countInterval = setInterval(function() {
+  clearInterval(countInterval);
+  countInterval = setInterval(function() {
     min = parseInt(secondsRemaining / 60);
     sec = parseInt(secondsRemaining % 60);