Worked on the cloudflare/terraform-provider-cloudflare repository to expand test coverage for data classification resources, focusing on delivering end-to-end acceptance tests for six DLP classification resources. Developed robust lifecycle validation for these resources, covering CRUD operations, updates, imports, and state management, using Go and Terraform. Implemented nested resource and import testing with ImportStateIdFunc and ImportStateIdPrefix to accurately reflect real-world usage and ensure correct state handling for complex hierarchies. Established reusable test fixtures and resource patterns to support scalable future extensions. These efforts improved CI reliability and reduced regression risk, accelerating safe feature delivery and enhancing overall release confidence.