diff --git a/frontend-js/src/test/js/ServerConnector-mock.js b/frontend-js/src/test/js/ServerConnector-mock.js
index 9b0c98452ab834f67eeb87dfc4700597ffcbea09..fa5f72b1f0b1dbb93d97386291cf4fcf646ec32d 100644
--- a/frontend-js/src/test/js/ServerConnector-mock.js
+++ b/frontend-js/src/test/js/ServerConnector-mock.js
@@ -20,7 +20,7 @@ function replaceAsterisk(str) {
 function urlToFileName(url) {
   var result = url;
   var token = OriginalServerConnector.getSessionData().getToken();
-  if (token !== undefined && token !== "" && url.startsWith("./testFiles/apiCalls")) {
+  if (token !== undefined && token !== "" && url.indexOf("./testFiles/apiCalls") === 0) {
     if (!result.endsWith("&") && !result.endsWith("_")) {
       result += "/";
     }