Workers - Run integration tests against your Worker's production build
UpdateUnverifiedAdded Sep 24, 2026
Wrangler now provides createTestHarness() , an API for running integration tests against Workers built with Wrangler or the Cloudflare Vite plugin from any Node.js test runner. The test harness starts a local Worker server with helpers for dispatching requests, resetting storage, and inspecting runtime logs .
Topics: Streaming, Observability, Developer tools
More Cloudflare developer platform releases
Every Cloudflare developer platform release| Date | Release | Type |
|---|---|---|
| Jul 27 | Agents, Workers - Agents SDK adds MCP Specification 2026-07-28 supportunverified Update | Update |
| Jul 27 | Audit Logs - Audit Logs v2 , Resource Historyunverified Update | Update |
| Jul 28 | 1.1.1.1 - Improved DoH JSON formatting for additional record typesunverified Update | Update |
| Jul 28 | Agents, Workers - Cloudflare MCP servers support the new MCP 2026-07-28 Specificationunverified Update | Update |
| Jul 28 | Browser Run - Browser Run adds structured handoff for Human in the Loopunverified Update | Update |
| Jul 28 | Cloudflare One, Gateway - Control Cloudflare Gateway DNS caching with a maximum TTL settingunverified Update | Update |
| Jul 28 | Workers AI - Select models now require the Workers Paid planunverified Update | Update |
| Jul 28 | Workers - Workers tracing , write custom spans with new startActiveSpan() and span.end() runtime APIsunverified Update | Update |
Also shipped on Jul 27, 2026
Cloudflare in July 2026
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