Simon Willison’s Weblog

26th September 2023

TIL Snapshot testing with Syrupy — I'm a big fan of snapshot testing - writing tests where you compare the output of some function to a previously saved version, and can re-generate that version from scratch any time something changes.

Posted 26th September 2023 at 11:39 pm

Recent articles

GPT-5.4 mini and GPT-5.4 nano, which can describe 76,000 photos for $52 - 17th March 2026
My fireside chat about agentic engineering at the Pragmatic Summit - 14th March 2026
Perhaps not Boring Technology after all - 9th March 2026

This is a beat by Simon Willison, posted on 26th September 2023.

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