Test Master
Generates test files, creates mocking strategies, analyzes code coverage, designs test architectures, and produces test plans and defect reports across functional, performance, and security testing disciplines. Use when writing unit tests, integration tests, or E2E tests; creating test strategies or automation frameworks; analyzing coverage gaps; performance testing with k6 or Artillery; security testing with OWASP methods; debugging flaky tests; or working on QA, regression, test automation, quality gates, shift-left testing, or test maintenance.
Install
npx skills add Jeffallan/claude-skills --skill test-mastergit clone --depth 1 https://github.com/Jeffallan/claude-skills.git /tmp/claude-skills
mkdir -p ~/.claude/skills
cp -r /tmp/claude-skills/skills/test-master ~/.claude/skills/test-masterPersonal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.
From the SKILL.md
# Test Master
Comprehensive testing specialist ensuring software quality through functional, performance, and security testing.
## Core Workflow
1. **Define scope** — Identify what to test and which testing types apply
2. **Create strategy** — Plan the test approach across functional, performance, and security perspectives
3. **Write tests** — Implement tests with proper assertions (see example below)
4. **Execute** — Run tests and collect results
- If tests fail: classify the failure (assertion error vs. environment/flakiness), fix root cause, re-run
- If tests are flaky: isolate ordering dependencies, check async handling, add retry or stabilization logic
5. **Report** — Document findings with severity ratings and actionable fix recommendations
- Verify coverage targets are met before closing; flag gaps explicitly
## Quick-Start Example
A minimal Jest unit test illustrating the key patterns this skill enforces:
```js
// ✅ Good: meaningful description, specific assertion, isolated dependency
describe('calculateDiscount', () => {
it('applies 10% discount for premium users', () => {
const result = calculateDiscount({ price: 100, userTier: 'premium' });
expect(result).toBe(90); // specific outcome, not just truthy
});
it('throws on negative price', () => {
expect(() => calculateDiscount({ price: -1, userTier: 'standard' }))
.toThrow('Price must be non-negative');
});
});
```Details
- Skill name
test-master- Repository
- Jeffallan/claude-skills
- Path
skills/test-master/SKILL.md- License
- MIT
- Repo updated
- 30 October 2026
FAQ
What does the Test Master skill do?
Generates test files, creates mocking strategies, analyzes code coverage, designs test architectures, and produces test plans and defect reports across functional, performance, and security testing disciplines. Use when writing unit tests, integration tests, or E2E tests; creating test strategies or automation frameworks; analyzing coverage gaps; performance testing with k6 or Artillery; security testing with OWASP methods; debugging flaky tests; or working on QA, regression, test automation, quality gates, shift-left testing, or test maintenance.
How do I install the Test Master skill?
skills CLI (Claude Code, Cursor, Codex and more): npx skills add Jeffallan/claude-skills --skill test-master. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.
Is Test Master popular?
It lives in Jeffallan/claude-skills, which has 12,146 GitHub stars and 1,162 forks, and is included in 3 curated skill lists.
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