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Tech riderRev. 5 Oct 2026

NonDex

Ch 236.8of 30 Test Flakiness Management Software
  1. 1Runs onLinux, Mac
  2. 2CostsFree plan
  3. 3Flake detectionYes
  4. 4Supported frameworksJUnit, TestNG
4 lines stated Written from the maker's own pages: github.com
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Overview

NonDex is ranked #23 of 30 in test flakiness management software on Specifiction. It runs on Linux, macOS. There is a free plan.

NonDex plans and pricing

All plans
NonDex Free MIT-licensed software · Java 8–21 · Maven 3.6+ with Surefire or Gradle 5.0+ github.com · 5 Oct 2026

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

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Where it ranks on Specifiction

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Sources