ModsJava
Mc Runtime Test Mod (26.3, 1.20.1) – Test Client Crashes Without Opening
Java mod listed for Minecraft 1.20–26.x. Downloads from the MC Java Mods app on Android.
⬇ DownloadMc Runtime Test Mod automates the client boot testing process for Minecraft mods. It launches the game client inside automated testing environments so you can spot crashes without opening the game manually. The mod enters a single-player world, waits for world chunks to load, and then shuts down cleanly. It also runs built-in game tests to help verify that your projects work properly across different game versions.
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Features:
- Headless Client Launches: Uses HeadlessMC to start Minecraft inside automated pipelines without needing a physical screen.
- Automatic World Booting: Enters a single-player world, waits for terrain chunks to load up, and quits the game after several seconds.
- GameTest Framework Support: Triggers game tests automatically right after loading into the test world.
- Multi-Loader Compatibility: Works across Forge, Fabric, and NeoForge across a wide selection of game versions.
- Helps catch client-only bugs that only show up when the game boots through a real launcher setup.
- Saves testing time by removing the need to launch Minecraft by hand after every code change.
- Works with virtual framebuffers to simulate display outputs on server machines.
- Provides optional game folder caching to make repeat test runs finish faster.
How to Use:
- Add the test step into your automated project workflow file.
- Set your chosen Minecraft version, mod loader, and matching Java version in the job settings.
- Run your automated build job on your code repository.
- Review the output logs to confirm that the client booted, loaded chunks, and closed without errors.
Mc Runtime Test Mod Download Links
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 26.3, 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: In MC Java Mods, or directly above on this page.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Downloads as 539474.mcaddon
- Download size: 326 KB
- Download link checked 3 Nov 2026 — working
- Mirrored on our own servers — the download does not depend on the original host
These come from our own check of the pack file, not from the source page.