diff --git a/example/test_code_environment.js b/example/test_code_environment.js
index f86cba0..84c8307 100644
--- a/example/test_code_environment.js
+++ b/example/test_code_environment.js
@@ -3,7 +3,7 @@
  */
 
 var fs = require("fs");
-var Lexer = require('./lexer.js');
+var Lexer = require('./test_lexer.js');
 
 var std = (function () {
     var protos = "__protos__";
diff --git a/example/lexer.js b/example/test_lexer.js
similarity index 99%
rename from example/lexer.js
rename to example/test_lexer.js
index 612b0d0..523b729 100644
--- a/example/lexer.js
+++ b/example/test_lexer.js
@@ -38,7 +38,7 @@ var errors = {
     "1": "found unknown symbol"
 };
 
-var Lexer = function(_string) {
+var Test_lexer = function(_string) {
     this._last_found_lexeme = {
         error: -1
     };
@@ -53,7 +53,7 @@ var Lexer = function(_string) {
     this._yy_accept = 0;
 };
 
-Lexer.prototype = {
+Test_lexer.prototype = {
     types: types,
     errors: errors,
     _notFoundCloseQuote: function() {
@@ -2206,4 +2206,4 @@ var print_f = function() {
 
     return r_str;
 };
-module.exports = Lexer
\ No newline at end of file
+module.exports = Test_lexer
\ No newline at end of file