NonDex

About

NonDex is ranked #16 of 29 in test flakiness management software on Inferse. It runs on Linux, macOS. There is a free plan.

Compared on test flakiness management software

Flake detection

Yesgithub.com

Supported frameworks

JUnit, TestNGgithub.com

Facts

Purpose

NonDex detects and helps debug incorrect assumptions about under-determined Java APIs by exploring behaviors allowed by their specifications.github.com · 5 Oct 2026

Use case

It can expose implementation-dependent flaky tests before assumptions cause portability bugs across Java runtime environments.github.com · 5 Oct 2026

Test runners

The project provides Maven and Gradle plugins, plus command-line usage instructions.github.com · 5 Oct 2026

Debugging

Its debug tasks report reproduction arguments and debug output for flaky tests, including a stack trace for an invocation point when one can be identified.github.com · 5 Oct 2026

Requirements

The README lists Java 8–21 (Oracle JDK or OpenJDK), Maven 3.6+ and Surefire for the Maven plugin, and Gradle 5.0+ for the Gradle plugin.github.com · 5 Oct 2026

API coverage

The supported API list includes collection and reflection APIs, file listing methods, and locale or time-related methods.github.com · 5 Oct 2026

Installation

The README shows plugin versions 2.2.1 for Maven and Gradle setup.github.com · 5 Oct 2026

License

The repository includes an MIT license granting permission to use, copy, modify, distribute, sublicense, and sell the software, subject to its conditions.github.com · 5 Oct 2026

License warranty

The MIT license provides the software as-is without warranty.github.com · 5 Oct 2026

Platform setup

The README describes an automatic Gradle setup script for Linux or macOS.github.com · 5 Oct 2026

Java compatibility note

The README says Java 9 and later require replacing the Java 8 boot class path option with module exports and patch-module options for the command-line setup.github.com · 5 Oct 2026

Output

NonDex reports tests that pass without shuffling but fail in shuffled runs and logs them in a .nondex directory.github.com · 5 Oct 2026

Where it ranks on Inferse

• Best Test Flakiness Management Software in 2026#16 of 29

Sources

• github.com/TestingResearchIllinois/NonDex· checked 5 Oct 2026
• github.com/TestingResearchIllinois/NonDex/wiki/Sup· checked 5 Oct 2026
• github.com/TestingResearchIllinois/NonDex/blob/mas· checked 5 Oct 2026