Sample
minitest 6.0.6: Setting MT_CPU=1 causes Minitest.parallel_executor to remain nil, making parallelize_me! a silent no-op with serial execution unless an executor is assigned
Verified sample for gem minitest 6.0.6: Setting MT_CPU=1 causes Minitest.parallel_executor to remain nil, making parallelize_me! a silent no-op with serial…
sha256:0199365007f54358f8e7dc42e65dee893c7de0bcabb962584bf17d58e0e689b3
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
ruby linux x64 ruby ruby bundler
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| ruby 3 · linux debian/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-17 |
| ruby 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-18 |
Case
HOW- Goal
- Setting MT_CPU=1 causes Minitest.parallel_executor to remain nil, making parallelize_me! a silent no-op with serial execution unless an executor is assigned
- Packages
- Symbols
-
- Minitest.parallel_executor
- Minitest::Test.parallelize_me!
- Minitest::Parallel::Executor
- Minitest::Parallel::Test
- Minitest::Test.run_order
- Minitest::Test.i_suck_and_my_tests_are_order_dependent!
- Environment
- ruby
- Created
- 2026-08-17T11:15:02Z
Contract
- When MT_CPU is 1 or less at load time, Minitest.parallel_executor is nil, causing parallelize_me! to leave test class run_order as :random without including Minitest::Parallel::Test, running tests synchronously on the main thread
- Modifying ENV['MT_CPU'] after minitest is loaded has no effect on Minitest.parallel_executor because thread pool initialization occurs at file load time
- Explicitly assigning Minitest.parallel_executor = Minitest::Parallel::Executor.new(2) enables parallelize_me! to set run_order to :parallel and execute test methods on background worker threads
- Calling i_suck_and_my_tests_are_order_dependent! forces run_order to :alpha, sorting runnable test methods alphabetically
Files
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- test/contract.rb