Redstone Unit Testing
by stmblbmbl
Redstone Unit Testing adds simple interface unit tests for Minecraft redstone circuits, built for Fabric on 1.21.10 – 1.21.11.
What it does
Builders can set up a test that places a block, feeds an input to a circuit and checks an assertion on the output, so a redstone build can be verified without manual clicking. Client and server both need the mod, and it is released under the GNU General Public License v2.0 only, which makes it open source. The source code is public, and the single Fabric file, 0.0.1 for 1.21.11, is marked alpha.
Key features
Assertion tests
A test asserts the expected output of a redstone circuit after a given input is applied.
Block placement steps
A test can place a block at a set position, then apply input to the circuit to drive it.
Testing with a wooden axe
The test tool is a wooden axe, so the testing workflow starts from an item already in the game.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Redstone Timer is Fabric for 1.21.1, open source under the MIT License, and needs the client and server environment. RedTooth is Fabric for 1.21.6 – 1.21.7, not open source, with a CC0 1.0 Universal license and server-required, client-optional environment. Quick Redstone is Fabric for 1.21.1 – 1.21.11, not open source under the MIT License, and server-side only.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Redstone Unit Testing | Fabric | 1.21.10 – 1.21.11 | Client and server | 2026-03-10 |
| Redstone Timer | Fabric | 1.21.1 | Client and server | 2026-05-10 |
| RedTooth | Fabric | 1.21.6 – 1.21.7 | Server required, client optional | 2025-07-15 |
| Quick Redstone | Fabric | 1.21.1 – 1.21.11 | Server-side only | 2026-07-25 |
Questions
Does Redstone Unit Testing need to be installed on the server?
In the catalog
Redstone Unit Testing is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
A (fairly) simple interface for unit testing. To add an assertion or input, place down the block that it should be and left (for an input) or right (for an assertion) click with a wooden axe to add it.
Official listing
- Modrinth page
- modrinth.com/mod/redstone-unit-testing
- Owner
- stmblbmbl
- Published
- 2026-03-10
- Updated on Modrinth
- 2026-03-10
- Facts verified
- 2026-10-15