diff --git a/samples/client/petstore/javascript-promise-es6/test/model/ModelReturn.spec.js b/samples/client/petstore/javascript-promise-es6/test/model/ModelReturn.spec.js
deleted file mode 100644
index 5c995def36f..00000000000
--- a/samples/client/petstore/javascript-promise-es6/test/model/ModelReturn.spec.js
+++ /dev/null
@@ -1,65 +0,0 @@
-/**
- * OpenAPI Petstore
- * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
- *
- * The version of the OpenAPI document: 1.0.0
- * 
- *
- * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
- * https://openapi-generator.tech
- * Do not edit the class manually.
- *
- */
-
-(function(root, factory) {
-  if (typeof define === 'function' && define.amd) {
-    // AMD.
-    define(['expect.js', process.cwd()+'/src/index'], factory);
-  } else if (typeof module === 'object' && module.exports) {
-    // CommonJS-like environments that support module.exports, like Node.
-    factory(require('expect.js'), require(process.cwd()+'/src/index'));
-  } else {
-    // Browser globals (root is window)
-    factory(root.expect, root.OpenApiPetstore);
-  }
-}(this, function(expect, OpenApiPetstore) {
-  'use strict';
-
-  var instance;
-
-  beforeEach(function() {
-    instance = new OpenApiPetstore.ModelReturn();
-  });
-
-  var getProperty = function(object, getter, property) {
-    // Use getter method if present; otherwise, get the property directly.
-    if (typeof object[getter] === 'function')
-      return object[getter]();
-    else
-      return object[property];
-  }
-
-  var setProperty = function(object, setter, property, value) {
-    // Use setter method if present; otherwise, set the property directly.
-    if (typeof object[setter] === 'function')
-      object[setter](value);
-    else
-      object[property] = value;
-  }
-
-  describe('ModelReturn', function() {
-    it('should create an instance of ModelReturn', function() {
-      // uncomment below and update the code to test ModelReturn
-      //var instane = new OpenApiPetstore.ModelReturn();
-      //expect(instance).to.be.a(OpenApiPetstore.ModelReturn);
-    });
-
-    it('should have the property _return (base name: "return")', function() {
-      // uncomment below and update the code to test the property _return
-      //var instane = new OpenApiPetstore.ModelReturn();
-      //expect(instance).to.be();
-    });
-
-  });
-
-}));