Fast and Reliable Testing
Harness combines Test Intelligence, automatic flaky test quarantine, and enforced code coverage — so your pipeline runs faster without losing signal or trust.
Most test suites make you choose between speed and trust. Test Intelligence, flaky test quarantine, and coverage enforcement run together on every build, so the gains compound instead of trading off.
Intelligent test selection. Harness analyzes each code change and automatically runs only the unit tests that exercise it, skipping the rest without sacrificing signal.
Multi-language support. Works out of the box with Java, Python, Ruby, C#, Scala, Kotlin, and JavaScript (beta), across frameworks like JUnit, pytest, RSpec, and Maven.
Parallel test execution. Splits the remaining tests into parallel workloads that run simultaneously, compounding the time saved from smart selection.
Test Intelligence works with the languages and frameworks your team already uses.
JUnit 4 & 5, TestNG
pytest, unittest
RSpec, Minitest
NUnit, MSTest, xUnit
Go test
Jest, Mocha (coming soon)
JUnit via JVM
ScalaTest via JVM
Tests that pass and fail inconsistently erode trust in your pipeline and waste hours on reruns. Harness automatically identifies flaky tests and quarantines them, so a flaky failure never blocks a good deploy.
Harness tracks pass/fail history for every test across builds and flags tests with inconsistent outcomes — no manual tagging required.
Flaky tests are moved out of the main pipeline gate automatically. They keep running and reporting, but they can no longer block a merge.
See flake rate, failure history, and last known-good run for every quarantined test, so your team can fix the underlying issue instead of ignoring it.
Flaky tests · Last 30 days
Test Intelligence tracks coverage alongside test selection, so reducing what you run never means losing visibility into what's protected.
Track coverage at both the repository and branch level, with trend lines so you can see whether coverage is improving or slipping over time.
Drill into any file to see exactly which lines are missed, so teams can prioritize coverage work where it matters most.
Set coverage thresholds as a pipeline gate. Builds that drop below the bar fail fast, before the gap reaches production.
Test Intelligence takes minutes to configure and starts delivering results on the first build. No test refactoring required.