--- title: The Dangers of Testing in SQLite as a Postgres User description: Using SQLite as a drop-in replacement for Postgres in tests creates a false sense of security. Key differences include SQLite's type affinity (it silently... canonical: https://daily.dev/posts/the-dangers-of-testing-in-sqlite-as-a-postgres-user-erhfste7j twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: The Dangers of Testing in SQLite as a Postgres User | daily.dev og:description: Using SQLite as a drop-in replacement for Postgres in tests creates a false sense of security. Key differences include SQLite's type affinity (it silently... og:url: https://daily.dev/posts/the-dangers-of-testing-in-sqlite-as-a-postgres-user-erhfste7j og:image: https://api.daily.dev/og/posts/erhFSTe7J.png og:image:alt: The Dangers of Testing in SQLite as a Postgres User og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # The Dangers of Testing in SQLite as a Postgres User **[Neon](https://daily.dev/sources/neontech)** · 10 min read · 0 upvotes · 0 comments ## Summary Using SQLite as a drop-in replacement for Postgres in tests creates a false sense of security. Key differences include SQLite's type affinity (it silently accepts floats in integer columns), lack of native JSON operators and array types, and a simpler concurrency model with database-level locking vs Postgres' MVCC. Performance comparisons are also misleading since SQLite runs in-process while Postgres uses a client-server model. The post then promotes Neon, a serverless Postgres platform, as an alternative that provides ephemeral database branching for fast, isolated, production-faithful test environments. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [SQLite for Everything](https://daily.dev/posts/sqlite-for-everything-rupb2mkye) · Lobsters · 7 upvotes · 1 comments - [100000 TPS over a billion rows: the unreasonable effectiveness of SQLite](https://daily.dev/posts/100000-tps-over-a-billion-rows-the-unreasonable-effectiveness-of-sqlite-pslxym1dd) · Hacker News · 2 upvotes · 0 comments - [Learning a few things about running SQLite](https://daily.dev/posts/learning-a-few-things-about-running-sqlite-lnbwnhclc) · Julia Evans · 2 upvotes · 0 comments --- Tags: [#postgresql](https://daily.dev/tags/postgresql), [#sqlite](https://daily.dev/tags/sqlite) [View this post on daily.dev](https://daily.dev/posts/the-dangers-of-testing-in-sqlite-as-a-postgres-user-erhfste7j) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"The Dangers of Testing in SQLite as a Postgres User","url":"https://daily.dev/posts/the-dangers-of-testing-in-sqlite-as-a-postgres-user-erhfste7j","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/the-dangers-of-testing-in-sqlite-as-a-postgres-user-erhfste7j"},"datePublished":"2026-07-09T06:57:27.893Z","dateModified":"2026-07-09T06:58:01.070Z","description":"Using SQLite as a drop-in replacement for Postgres in tests creates a false sense of security. 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