TestRunEXecute
TREX automatically writes, runs, and diagnoses tests for every pull request so your team ships with confidence.
How TREX tests every PR
Writes tests for each pull request
Greptile automatically generates targeted tests for every PR, covering the changes and edge cases humans might miss.
Runs them in a sandbox
Tests are executed autonomously in an isolated sandbox environment — no setup or infrastructure changes required.
Diagnoses failing code
When tests fail, TREX diagnoses the root cause and identifies the exact problematic lines of code in the PR.
100% test coverage, now on autopilot
Choose tests to add to your repo
TREX can commit generated tests directly to your branch — no copy-pasting, no context switching. Review and merge like any other PR.
Any language & environment
TREX generates tests for any language, framework, or environment your team uses.
No setup required
Start running tests without custom rules, language-specific setup, or extra scaffolding.
Explore other features at Greptile
Find out more about how teams are using Greptile
