Slack Engineering·Jun 11, 2026·14 read·midAgentic Testing: Where Agents Fit in the E2E Testing Stack
This article analyzes the efficacy of agent-driven end-to-end (E2E) testing compared to traditional deterministic tests. Through over 200 experiments using the Playwright MCP, CLI, and LLM-generated scripts, the authors evaluate the reliability, cost, and execution time of goal-oriented agent testing. They conclude that while traditional tests remain essential for CI, agentic testing provides a valuable layer for exploratory and complex behavior validation.
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