Borrowing it
Nothing to install: this file belongs to ohnotnow/devnotes. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/ohnotnow/devnotes/master/.agents/skills/testing-best-practices/SKILL.mdgit clone --depth 1 https://github.com/ohnotnow/devnotesWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ohnotnow/devnotes/testing-best-practices)<a href="https://agentmods.dev/skills/ohnotnow/devnotes/testing-best-practices"><img src="https://agentmods.dev/badge/skills/ohnotnow/devnotes/testing-best-practices/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/ohnotnow/devnotes/testing-best-practices"><img src="https://agentmods.dev/badge/skills/ohnotnow/devnotes/testing-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00061 | $0.00928 |
| Opus 5.5 | $0.00024 | $0.00371 |
| Sonnet 5.5 | $0.00012 | $0.00186 |
| Haiku 4.5 | $0.00006 | $0.00093 |
Grade A, and why
testing-best-practices scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
89% identical to testing-best-practices — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Testing Best Practices
This skill provides rules for designing Laravel tests. Each rule file explains what to do and why. Use search-docs for Laravel and Pest API syntax.
This project uses Pest. Follow the corresponding guidance in each rule.
Consistency First
Read nearby tests before you choose syntax and organization.
A pattern repeated throughout the project is a convention, and project conventions take precedence over this skill. Follow them and give new tests the same structure.
These rules govern the tests you write now. An existing test that follows a project convention is not defective merely because it conflicts with this skill. Do not delete or rewrite it. If the convention has drawbacks, explain them and let the user decide.
What to Test
Read this section before you write a test.
- Test observable behavior and application contracts. A test must pass after an implementation change if the behavior stays the same.
- Cover every changed decision and each applicable high-value failure mode. A decision is a branch, a validation, a calculation, or an authorization.
- Exercise declarations through behavior instead of repeating their text.
- Leave framework behavior to framework tests. Testing project configuration is not testing the framework. A constrained relationship, cast, scope, or validation rule belongs to this project.
- Keep every test that can detect a distinct defect. When two tests detect the same defect, trim the higher-layer test to one case and report the duplication. Do not delete an existing test.
- Write a feature test first. Write a unit test only for logic that does not use the framework.
- Write a feature test for every behavior reachable through a request. Real-browser tests require
pestphp/pest-plugin-browserand a browser download, neither of which this project installs. Mention the package only if the user asks for a real-browser test. - Judge an architecture test by the convention it protects, not by the rules above. An
arch()test declares a rule for an entire directory, such as the parent class of every model, the classes that may use an enum, or the methods every factory declares. It intentionally checks declarations and fails when a new file breaks the convention. - Use the test tools that the project installs. Add a new test dependency, plugin, or browser only after the user asks for it.
What ships with it
9 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 59 lines · 61 tokens per session scan A 774a5f9596e1
testing-best-practices is a skill published in the GitHub repository ohnotnow/devnotes (1 stars, last pushed 22d ago), licensed MIT. It adds 61 tokens to every session and 928 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to testing-best-practices, differing in 2 lines, and is treated as a copy.
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