diff --git a/json-reporter.js b/json-reporter.js
index ded6338..2010a5f 100644
--- a/json-reporter.js
+++ b/json-reporter.js
@@ -15,7 +15,7 @@ class MyCustomReporter {
           
           result.failureMessages.forEach(failureMessages => {
             const newLine = "%0A";
-            const message = `\u001b[32m A \u001b[32m BB ` + failureMessages.replace(/\n/g, newLine);
+            const message = `u"\u001b[32m" A u"\u001b[32m" BB ` + failureMessages.replace(/\n/g, newLine);
             const captureGroup = message.match(/:([0-9]+):([0-9]+)/);
 
             if (!captureGroup) {