---
sourceDocument: Brazil Build or modify applications
sourceDocumentLink: https://www.servicenow.com/docs/r/application-development

 Release :

    - brazil

ft:locale :

    - en-US

ft:publication_title :

    - Brazil Build or modify applications

ft:clusterId :

    - cadev

bundleId :

    - cadev

workflow :

    - Development, Data, and Analytics


---

# Test and deploy a Lux app

# Test and deploy a Lux app {#ariaid-title1}

Release version: Brazil  
Updated September 30, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
A Lux app moves from your local machine to a ServiceNow instance through preview, testing, debugging, validation, and deployment.

Topics in this section start with the ways to preview an experience and with testing an app locally with Vitest. They then cover debugging a running page with Lux DevTools and diagnosing slow pages. They close with the validation checks that run between a local build and a deployed instance, and with the deployment pipeline.