Your AI Agent Has No Tests - Here's How to Fix That in 5 Minutes

You test your UI. You test your API. You write integration tests, unit tests, E2E tests. But your AI agent? It picks tools, handles failures, processes PII, makes autonomous decisions - and you're running it in production with zero tests . That's wild. Let's fix it. The Problem Nobody Talks About AI agents are not just LLMs with a nice wrapper. They: Call tools - and sometimes call the wrong one Make decisions - routing, retries, fallbacks Handle errors - or silently swallow them Process sensitive data - PII, credentials, financial info Existing testing tools don't cover this. Promptfoo tests prompts. DeepEval tests outputs. But nothing tests agent behavior - the decisions your agent makes between receiving a request and returning a response. What happens when your tool times out? When the LLM hallucinates a function name? When two agents in a pipeline disagree? You don't know, because you've never tested it. AgentProbe: Playwright for AI Agents AgentProbe brings the same test-driven d