diff --git a/lib/logging/console.js b/lib/logging/console.js
index d340348..ec27744 100644
--- a/lib/logging/console.js
+++ b/lib/logging/console.js
@@ -7,9 +7,9 @@ var websocket = null
 var logger = (function () { // eslint-disable-line no-unused-vars
   const sep = '\n/* ### NEXT TESTCASE ############################## */'
   const color = {
-    red: '\033[1;31m', // eslint-disable-line
-    green: '\033[1;32m', // eslint-disable-line
-    clear: '\033[0m' // eslint-disable-line
+    red: '\u{1b}[1;31m',
+    green: '\u{1b}[1;32m',
+    clear: '\u{1b}[0m'
   }
   if (utils.platform.isWindows) {
     color.red = ''
@@ -49,7 +49,7 @@ var logger = (function () { // eslint-disable-line no-unused-vars
   }
 
   function JSError (msg) {
-    error(comment("ERROR: " + msg))
+    error(comment('ERROR: ' + msg))
   }
 
   function comment (msg) {