Prompt reduces unit test runtime from 8 to 3 minutes
mhmazur · x · 2026-08-30
The author successfully reduced unit test runtime from 8 minutes to 3 minutes using a simple prompt to Claude.
Issues identified and fixed:
- Terminal progress bar consumed 1 minute per run
- Every test user rendered a complete welcome email
- Receipt tests launched headless Chrome to build irrelevant PDFs
Daily test time dropped from 3 hours to 1 hour, requiring only a 10-word prompt.
Related event: Users Prompt Claude to Slash Unit Test Time from 8 Minutes(2 posts)→
More from coding & agent
- Simon Willison: code mode is the future of tool calling, if it can be sandboxed — springrod · 2026-10-16
- Dev workflow: Astra for tedious tasks, Claude for ideas not implementation — menhguin · 2026-10-16
- Agent named 'Ilya' reportedly scores 1.1pt higher on benchmarks — daniel_mac8 · 2026-10-16
- Gemini CLI fix: substring matching inlined unrequested binary files into model context — priyanshu1976 · 2026-10-16
- Building AI agents on real healthcare claims data: the domain work that makes them work — alex_verem · 2026-10-16
- OpenAI stealth-testing mysterious internal model 'Aeon' in Codex desktop app and Dots — cedric_chee · 2026-10-16