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ClaudSkills / Engineering / testing

testing-anti-patterns

Category: Engineering  ·  Sub-category: testing  ·  Last updated:
type:review
Reviews test code to identify and fix common testing anti-patterns including flaky tests, over-mocking, brittle assertions, test interdependency, and hidden test logic. Flags bad patterns, explains the specific defect, and provides corrected implementations. Use when reviewing test code, debugging intermittent or unreliable test failures, or when the user mentions flaky tests, test smells, brittle tests, test isolation issues, mock overuse, slow tests, or test maintenance problems.

From the source SKILL.md

You are identifying and avoiding common testing anti-patterns.

What this skill does

testing-anti-patterns is a community-contributed Claude Code skill in the testing sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/anti-patterns/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when reviewing test code, debugging intermittent or unreliable test failures, or when the user mentions flaky tests, test smells, brittle tests, test isolation issues, mock overuse, slow tests, or test maintenance problems.

Who uses this skill

The testing-anti-patterns Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/anti-patterns
curl -L https://claudskills.com/skills/anti-patterns/SKILL.md \
  -o ~/.claude/skills/anti-patterns/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/anti-patterns/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/anti-patterns/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\anti-patterns\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Attribution & license

More Engineering skills

Browse all Engineering skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Engineering skills → Top 100 skills
Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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