# Agentic Testing: Where Agents Fit in the E2E Testing Stack

DevFeed: [Agentic Testing: Where Agents Fit in the E2E Testing Stack](<https://devfeed.tech/articles/agentic-testing-where-agents-fit-in-the-e2e-testing-stack-144.md>)

Original publisher: [Read original article](<https://slack.engineering/agentic-testing-where-agents-fit-in-the-e2e-testing-stack/>)

Author: Sergii Gorbachov

Published: 2026-06-11T14:15:28Z

Content type: article

Language: en

Sources: [Engineering at Slack](<https://devfeed.tech/sources/engineering-at-slack.md>)

Topics: [Playwright](<https://devfeed.tech/topics/playwright.md>), [Model Context Protocol](<https://devfeed.tech/topics/model-context-protocol.md>), [large-language-models](<https://devfeed.tech/topics/large-language-models.md>), [User Interfaces](<https://devfeed.tech/topics/user-interfaces.md>)

Tags: [agentic](<https://devfeed.tech/tags/agentic.md>), [agents](<https://devfeed.tech/tags/agents.md>), [automation-testing](<https://devfeed.tech/tags/automation-testing.md>), [browser](<https://devfeed.tech/tags/browser.md>), [code](<https://devfeed.tech/tags/code.md>), [cost](<https://devfeed.tech/tags/cost.md>), [developer-productivity](<https://devfeed.tech/tags/developer-productivity.md>), [e2e-testing](<https://devfeed.tech/tags/e2e-testing.md>), [innovation](<https://devfeed.tech/tags/innovation.md>), [language-models](<https://devfeed.tech/tags/language-models.md>), [large-language-models](<https://devfeed.tech/tags/large-language-models.md>), [mcp](<https://devfeed.tech/tags/mcp.md>), [speed](<https://devfeed.tech/tags/speed.md>), [testing](<https://devfeed.tech/tags/testing.md>), [uncategorized](<https://devfeed.tech/tags/uncategorized.md>), [workflow](<https://devfeed.tech/tags/workflow.md>)

## AI overview

The article examines agent-driven end-to-end testing as an exploratory complement to deterministic tests. Based on more than 200 runs using Playwright MCP, Playwright CLI, and agent-generated Playwright tests, it compares how agents pursue goals through variable UI paths and considers reliability, execution time, and cost.

## Source excerpt

Abstract Agent-driven end-to-end (E2E) tests add a new exploratory layer to testing, but should they replace traditional deterministic tests? We ran more than 200 agentic E2E workflows using the Playwright MCP, Playwright CLI, and agent-generated Playwright tests in test workspaces using non-production data to find out how agentic testing could fit into both our and...