diff --git a/frontend-js/src/test/js/logger.js b/frontend-js/src/test/js/logger.js
index bc36fa1aa0f48a08eba02f1d513e01d2a9d5926a..8bf92b10da8c06bf0d585f558be563a94e5dd926 100644
--- a/frontend-js/src/test/js/logger.js
+++ b/frontend-js/src/test/js/logger.js
@@ -41,7 +41,7 @@ logger.getErrors = function () {
   var buffer = inMemoryAppender.buffer.default;
   for (var i = 0; i < buffer.length; i++) {
     var message = buffer[i];
-    if (message.indexOf("'ERROR'") !== -1) {
+    if (message.indexOf("ERROR") !== -1) {
       result.push(message);
     }
   }
@@ -52,7 +52,7 @@ logger.getWarnings = function () {
   var buffer = inMemoryAppender.buffer.default;
   for (var i = 0; i < buffer.length; i++) {
     var message = buffer[i];
-    if (message.indexOf("'WARN'") !== -1) {
+    if (message.indexOf("WARN") !== -1) {
       result.push(message);
     }
   }