--- title: Have you ever had unit tests pass while a feature... description: Unit tests can pass while features fail after app relaunch because tests often run in a single session with warm memory and persistent state. The issue occurs... canonical: https://daily.dev/posts/have-you-ever-had-unit-tests-pass-while-a-feature-silently-failed-only-after-app-relaunch--shqvqqsmq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Have you ever had unit tests pass while a feature silently failed only after app relaunch? | daily.dev og:description: Unit tests can pass while features fail after app relaunch because tests often run in a single session with warm memory and persistent state. The issue occurs... og:url: https://daily.dev/posts/have-you-ever-had-unit-tests-pass-while-a-feature-silently-failed-only-after-app-relaunch--shqvqqsmq og:image: https://api.daily.dev/og/posts/sHQvQqSMq.png og:image:alt: Have you ever had unit tests pass while a feature silently failed only after app relaunch? 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. # Have you ever had unit tests pass while a feature silently failed only after app relaunch? **[Rebeloper](https://daily.dev/sources/rebeloper)** · 1 min read · 0 upvotes · 0 comments ## Summary Unit tests can pass while features fail after app relaunch because tests often run in a single session with warm memory and persistent state. The issue occurs when tests don't verify lifecycle boundaries like termination and relaunch. The solution is to force tests to persist and reload state on fresh instances, catching bugs that would otherwise ship to production. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Achieve Reliable Native E2E Tests Beyond Fixing Flakes](https://daily.dev/posts/achieve-reliable-native-e2e-tests-beyond-fixing-flakes-r7dwgxwzv) · Docker · 2 upvotes · 0 comments - [Better world by better software](https://daily.dev/posts/better-world-by-better-software-afxfv6uwc) · Gleb Bahmutov · 0 upvotes · 0 comments - [State-Leak Bugs Aren’t Edge Cases. Move Them to Rule One.](https://daily.dev/posts/state-leak-bugs-aren-t-edge-cases-move-them-to-rule-one--codeebnjm) · Medium · 1 upvotes · 0 comments --- Tags: [#testing](https://daily.dev/tags/testing) [View this post on daily.dev](https://daily.dev/posts/have-you-ever-had-unit-tests-pass-while-a-feature-silently-failed-only-after-app-relaunch--shqvqqsmq) ```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":"Have you ever had unit tests pass while a feature silently failed only after app relaunch?","url":"https://daily.dev/posts/have-you-ever-had-unit-tests-pass-while-a-feature-silently-failed-only-after-app-relaunch--shqvqqsmq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/have-you-ever-had-unit-tests-pass-while-a-feature-silently-failed-only-after-app-relaunch--shqvqqsmq"},"datePublished":"2026-01-24T22:35:04.825Z","dateModified":"2026-01-24T22:35:26.163Z","description":"Unit tests can pass while features fail after app relaunch because tests often run in a single session with warm memory and persistent state. 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