Building intent-driven UI testing with Amazon Nova Act

This article describes how Epsilon, a data and marketing-services company, built intent-driven UI testing as a managed platform service using Amazon Nova Act and Amazon Bedrock AgentCore Browser Tool.

• Natural-language test steps replace brittle CSS selectors, surviving UI redesigns and readable by non-engineers
• AWS-managed ephemeral browser sessions eliminate operational overhead of managing binaries and display servers
• Multi-tenant architecture uses cross-account IAM roles for isolation and auditability across product teams
• 18-step test workflows authored in 5-10 minutes versus 30-90 minutes for equivalent Playwright code
• Saved trajectories achieve 100% pass rate on replay, reducing LLM costs for regression testing
• Platform exposes UI testing through same API surface as other agent capabilities, requiring zero per-team infrastructure

Epsilon's approach demonstrates how to deliver resilient, intent-based testing as a scalable platform service while maintaining security, compliance, and operational simplicity.