CheckOps home

Tools directory

T

CheckOps

Trunk Flaky Tests

Trunk Flaky Tests is a commercial service that detects, quarantines and tracks flaky tests for any language, test runner and CI provider, with AI grouping of related failures and a generous free tier.

Visit website

Latest public signals

Not refreshed yet. Refresh reads the public site and, when the entry has a GitHub repository, the latest release.

Visit Website

Introduction

Trunk ‘detects, quarantines, and eliminates flaky tests from your code base’, according to its product page, and works with any language, test runner and CI provider.

Test results are uploaded from CI (commonly as JUnit XML) and analysed over time. AI groups related failures, whether tests pass locally but fail in CI or break intermittently across environments, so teams can monitor failure reasons and trends. Auto-quarantine lets known flaky tests keep running without failing builds, so pull requests are not blocked by noise while the tests are fixed. The page also notes an on-premises version in private preview.

Pricing is based on committers and test spans (one uploaded test case result).

In the quality loop it supports release gates by keeping CI results trustworthy.

Features

  1. Flaky detection: Identify intermittent tests from history.
  2. Auto-quarantine: Stop known flaky tests from failing builds.
  3. AI failure grouping: Cluster related failures.
  4. Any CI and runner: Language-agnostic uploads.
  5. Impact metrics: Estimate time lost to flakiness.

Pros

  1. Generous free tier: 1M test spans per committer per month.

Cons

  1. Quarantine risk: Hidden failures need follow-up.
  2. SaaS by default: On-prem only in preview.
  1. Add the Trunk upload step to CI after tests produce JUnit XML.
  2. Let history accumulate, then review detected flaky tests.
  3. Enable quarantine and assign owners to fix them.

Resources:

Pricing

$0 per committer with 1M test spans per committer per month, then $3 per additional 1M spans. See site.

  1. Teams losing time to flaky CI.
  2. Not a fit for tiny suites with rare flakiness.

Conclusion

Trunk Flaky Tests is a focused, affordable way to tame flaky tests across any stack.

On CheckOps, Trunk Flaky Tests is filed under the Release & CI gates stage. Related tools listed here include Buildkite Test Engine, BuildPulse, Currents, Develocity, CloudBees Smart Tests and Testmo. Before choosing, compare them on licence, supported languages and platforms, hosting model, and how well each fits your existing CI pipeline. Facts on this page were checked against the official website, documentation and repository on 11 November 2026; statements the vendor makes about its own product are marked as vendor claims.

Alternatives

Other tools on CheckOps that cover similar ground. Open a page, or compare one with Trunk Flaky Tests side by side.