diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/NodeJSExpressServerCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/NodeJSExpressServerCodegen.java
index 1ae10d803e7a..d89fb863fa8e 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/NodeJSExpressServerCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/NodeJSExpressServerCodegen.java
@@ -26,7 +26,6 @@
 import io.swagger.v3.oas.models.Paths;
 import io.swagger.v3.oas.models.info.Info;
 import org.openapitools.codegen.*;
-import org.openapitools.codegen.config.GeneratorProperties;
 import org.openapitools.codegen.meta.GeneratorMetadata;
 import org.openapitools.codegen.meta.Stability;
 import org.openapitools.codegen.utils.URLPathUtils;
@@ -98,7 +97,6 @@ public NodeJSExpressServerCodegen() {
         supportingFiles.add(new SupportingFile("controllers" + File.separator + "index.mustache", "controllers", "index.js"));
         supportingFiles.add(new SupportingFile("controllers" + File.separator + "Controller.mustache", "controllers", "Controller.js"));
         // service folder
-        supportingFiles.add(new SupportingFile("services" + File.separator + "test.mustache", "services", "TestService.js"));
         supportingFiles.add(new SupportingFile("services" + File.separator + "index.mustache", "services", "index.js"));
         supportingFiles.add(new SupportingFile("services" + File.separator + "Service.mustache", "services", "Service.js"));
 
diff --git a/modules/openapi-generator/src/main/resources/nodejs-express-server/services/index.mustache b/modules/openapi-generator/src/main/resources/nodejs-express-server/services/index.mustache
index 4a122c0a2496..19478453fa8f 100644
--- a/modules/openapi-generator/src/main/resources/nodejs-express-server/services/index.mustache
+++ b/modules/openapi-generator/src/main/resources/nodejs-express-server/services/index.mustache
@@ -9,7 +9,6 @@ const {{classname}}Service = require('./{{classname}}Service');
 {{/operations}}
 {{/apis}}
 {{/apiInfo}}
-const TestService = require('./TestService');
 
 module.exports = {
 {{#apiInfo}}
@@ -23,5 +22,4 @@ module.exports = {
 {{/operations}}
 {{/apis}}
 {{/apiInfo}}
-  TestService,
 };
diff --git a/modules/openapi-generator/src/main/resources/nodejs-express-server/services/test.mustache b/modules/openapi-generator/src/main/resources/nodejs-express-server/services/test.mustache
deleted file mode 100644
index 8ecd49dbf89b..000000000000
--- a/modules/openapi-generator/src/main/resources/nodejs-express-server/services/test.mustache
+++ /dev/null
@@ -1,113 +0,0 @@
-const Service = require('./Service');
-
-const testItems = require('../tests/testFiles/testItems.json');
-
-class TestService {
-  static testGetController() {
-    return new Promise(
-      async (resolve, reject) => {
-        try {
-          resolve(Service.successResponse(
-            testItems,
-            200,
-          ));
-        } catch (e) {
-          const message = e.getMessage() || 'Could not get items. Server error';
-          reject(Service.rejectResponse(message, 500));
-        }
-      },
-    );
-  }
-
-  static testDeleteController({ itemId }) {
-    return new Promise(
-      async (resolve, reject) => {
-        try {
-          let responseMessage = '';
-          const itemToDeleteIndex = testItems.findIndex(item => item.id === itemId);
-          if (itemToDeleteIndex > -1) {
-            testItems.splice(itemToDeleteIndex, 1);
-            responseMessage = `test item id ${itemId} deleted successfully`;
-          } else {
-            responseMessage = 'test item not found, nothing changed';
-          }
-          resolve(Service.successResponse(responseMessage, 200));
-        } catch (err) {
-          const message = err.getMessage() || 'Invalid test item value';
-          const code = err.status || 400;
-          reject(Service.rejectResponse(message, code));
-        }
-      },
-    );
-  }
-
-  static testPostController({ testItem }) {
-    return new Promise(
-      async (resolve, reject) => {
-        try {
-          const highestId = testItems[testItems.length - 1].id;
-          const newItem = {
-            id: highestId + 1,
-            name: testItem.name,
-            description: testItem.description,
-            version: testItem.version,
-          };
-          testItems.push(newItem);
-          resolve(Service.successResponse(newItem));
-        } catch (e) {
-          reject(Service.rejectResponse(
-            e.getMessage() || 'Invalid input',
-            e.status || 405,
-          ));
-        }
-      },
-    );
-  }
-
-  static testFindByIdController({ itemId }) {
-    return new Promise(
-      async (resolve, reject) => {
-        try {
-          const itemFound = testItems.find(item => item.id === itemId);
-          if (itemFound !== undefined) {
-            resolve(Service.successResponse(itemFound, 200));
-          } else {
-            reject(Service.rejectResponse('item not found', 404));
-          }
-        } catch (e) {
-          reject(Service.rejectResponse(e.getMessage() || 'Invalid ID supplied', 400));
-        }
-      },
-    );
-  }
-
-  static testPutController({ itemId, testItem }) {
-    return new Promise(
-      async (resolve, reject) => {
-        try {
-          let responseBody;
-          const itemToUpdate = testItems.find(item => item.id === itemId);
-          if (itemToUpdate !== undefined) {
-            itemToUpdate.name = testItem.name || itemToUpdate.name;
-            itemToUpdate.description = testItem.description || itemToUpdate.description;
-            itemToUpdate.version = testItem.version || itemToUpdate.version;
-            responseBody = itemToUpdate;
-          } else {
-            responseBody = `could not find an item with id ${itemId} to update. Nothing changed`;
-          }
-          resolve(Service.successResponse(
-            responseBody,
-            200,
-          ));
-        } catch (e) {
-          reject(Service.rejectResponse(
-            e.getMessage || 'Invalid input',
-            405,
-          ));
-        }
-      },
-    );
-  }
-}
-
-module.exports = TestService;
diff --git a/samples/server/petstore/nodejs-express-server/.openapi-generator/VERSION b/samples/server/petstore/nodejs-express-server/.openapi-generator/VERSION
index 479c313e87b9..83a328a9227e 100644
--- a/samples/server/petstore/nodejs-express-server/.openapi-generator/VERSION
+++ b/samples/server/petstore/nodejs-express-server/.openapi-generator/VERSION
@@ -1 +1 @@
-4.0.3-SNAPSHOT
\ No newline at end of file
+4.1.0-SNAPSHOT
\ No newline at end of file
diff --git a/samples/server/petstore/nodejs-express-server/services/TestService.js b/samples/server/petstore/nodejs-express-server/services/TestService.js
deleted file mode 100644
index 8ecd49dbf89b..000000000000
--- a/samples/server/petstore/nodejs-express-server/services/TestService.js
+++ /dev/null
@@ -1,113 +0,0 @@
-const Service = require('./Service');
-
-const testItems = require('../tests/testFiles/testItems.json');
-
-class TestService {
-  static testGetController() {
-    return new Promise(
-      async (resolve, reject) => {
-        try {
-          resolve(Service.successResponse(
-            testItems,
-            200,
-          ));
-        } catch (e) {
-          const message = e.getMessage() || 'Could not get items. Server error';
-          reject(Service.rejectResponse(message, 500));
-        }
-      },
-    );
-  }
-
-  static testDeleteController({ itemId }) {
-    return new Promise(
-      async (resolve, reject) => {
-        try {
-          let responseMessage = '';
-          const itemToDeleteIndex = testItems.findIndex(item => item.id === itemId);
-          if (itemToDeleteIndex > -1) {
-            testItems.splice(itemToDeleteIndex, 1);
-            responseMessage = `test item id ${itemId} deleted successfully`;
-          } else {
-            responseMessage = 'test item not found, nothing changed';
-          }
-          resolve(Service.successResponse(responseMessage, 200));
-        } catch (err) {
-          const message = err.getMessage() || 'Invalid test item value';
-          const code = err.status || 400;
-          reject(Service.rejectResponse(message, code));
-        }
-      },
-    );
-  }
-
-  static testPostController({ testItem }) {
-    return new Promise(
-      async (resolve, reject) => {
-        try {
-          const highestId = testItems[testItems.length - 1].id;
-          const newItem = {
-            id: highestId + 1,
-            name: testItem.name,
-            description: testItem.description,
-            version: testItem.version,
-          };
-          testItems.push(newItem);
-          resolve(Service.successResponse(newItem));
-        } catch (e) {
-          reject(Service.rejectResponse(
-            e.getMessage() || 'Invalid input',
-            e.status || 405,
-          ));
-        }
-      },
-    );
-  }
-
-  static testFindByIdController({ itemId }) {
-    return new Promise(
-      async (resolve, reject) => {
-        try {
-          const itemFound = testItems.find(item => item.id === itemId);
-          if (itemFound !== undefined) {
-            resolve(Service.successResponse(itemFound, 200));
-          } else {
-            reject(Service.rejectResponse('item not found', 404));
-          }
-        } catch (e) {
-          reject(Service.rejectResponse(e.getMessage() || 'Invalid ID supplied', 400));
-        }
-      },
-    );
-  }
-
-  static testPutController({ itemId, testItem }) {
-    return new Promise(
-      async (resolve, reject) => {
-        try {
-          let responseBody;
-          const itemToUpdate = testItems.find(item => item.id === itemId);
-          if (itemToUpdate !== undefined) {
-            itemToUpdate.name = testItem.name || itemToUpdate.name;
-            itemToUpdate.description = testItem.description || itemToUpdate.description;
-            itemToUpdate.version = testItem.version || itemToUpdate.version;
-            responseBody = itemToUpdate;
-          } else {
-            responseBody = `could not find an item with id ${itemId} to update. Nothing changed`;
-          }
-          resolve(Service.successResponse(
-            responseBody,
-            200,
-          ));
-        } catch (e) {
-          reject(Service.rejectResponse(
-            e.getMessage || 'Invalid input',
-            405,
-          ));
-        }
-      },
-    );
-  }
-}
-
-module.exports = TestService;
diff --git a/samples/server/petstore/nodejs-express-server/services/index.js b/samples/server/petstore/nodejs-express-server/services/index.js
index ca9599851baf..bdf3c87fb749 100644
--- a/samples/server/petstore/nodejs-express-server/services/index.js
+++ b/samples/server/petstore/nodejs-express-server/services/index.js
@@ -1,11 +1,9 @@
 const PetService = require('./PetService');
 const StoreService = require('./StoreService');
 const UserService = require('./UserService');
-const TestService = require('./TestService');
 
 module.exports = {
   PetService,
   StoreService,
   UserService,
-  TestService,
 };