@infection_php

Mutation Testing library for PHP based on AST

 Poland
infection.github.io/
Joined July 2017
  • Tweets432
  • Following1
  • Followers2.3K
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Infection now has a refreshed Playground. infection-php.dev
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Thanks @wikando for sponsoring Infection ♥️
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Infection PHP retweeted
Matt Pocock
@mattpocockukAug 2
Anyone using agents/tools to do mutation testing? Seems like it would ROCK during automated review for flushing out which branches of the code are actually covered by tests.
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Infection 0.34.0 is out! 🎉 It introduces a new feature for filtering source files to mutate and tests to run. Learn why it matters and how to use it: infection.github.io/guide/ar…
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Infection 0.33.0 has been released. - Testo test framework support (by @roxblnfk) - Allow using the full width of the terminal for console output Enjoy!
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See infection.github.io/guide/co…
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Do you use Infection with AI-generated code/tests? If so, what is the workflow / skills / prompts? Is there anything we need to improve here to make it more useful?
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Infection PHP retweeted
Aleksei Gagarin@roxblnfkMay 7
Lately I've been working on integrating #Testo #PHP with @infection_php There's still more ahead, but in the meantime you can read my fresh article about mutation testing php-testo.github.io/docs/the…

Testo

Modern PHP Testing Framework

php-testo.github.io
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Infection PHP retweeted
Vincent Amstoutz@vinceAmstoutzMay 2
Replying to @infection_php
I use it in a project and it's a killer feature! 🚀
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Now officially: Infection supports killing mutants by Static Analysis tools: - PHPStan - Mago infection.github.io/guide/st… Enjoy!
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Infection 0.32.3 has been released with new `--max-timeouts` and `--with-timeouts` options. Read the details in this blog post to understand how it helps with speeding up Mutation Testing and why you should start using them! infection.github.io/2026/01/… Thanks @sanmai!
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🎄 Xmas present Infection 0.32.0 has been released: - Format-presering pretty printing - new GitHub loggers with collapsable sections - Symfony 8 support; webmozart/assert@v2 support - and much more github.com/infection/infecti…

Release Format-presering pretty printing; new GitHub loggers with collapsable sections; Symfony 8...

Added: Support --exclude-source-from-xml-coverage fast path for PHPUnit 12.5+ by @staabm in #2604 Implement GitHubActionsLogTextFileLogger to improve DX of text file logger with GA by @staabm in #...

github.com
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Looks like #phpunit xml code-coverage generation could get nearly twice as fast in the future. this would for example considerably reduce overhead of the necessary "initial-test" step when running @infection_php on your project.
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.@phpstan has added @infection_php for PRs on GH Actions with a set of custom rules 🚀 github.com/phpstan/phpstan-s…

Setup mutation testing by staabm · Pull Request #4480 · phpstan/phpstan-src

analog Run tests in random order phpstan-doctrine#687 Setup mutation testing phpstan-doctrine#686 Utilize build-infection phpstan-doctrine#699

github.com
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How to write custom mutators: infection.github.io/guide/cu…
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.@xepozz started working on Infection Plugin for @phpstorm, please share your ideas here: github.com/infection/infecti… - What would you like to see? - How would you use it? - Where would you want to see Mutants diffs? Let's make it useful.

PHPStorm / Intellij IDEA plugin Roadmap · Issue #2437 · infection/infection

Blocked by #2446. PHPStorm / Intellij IDEA plugin is available: Marketplace https://plugins.jetbrains.com/plugin/28650-infection Sources: https://github.com/j-plugins/infection-plugin There's s...

github.com
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💡TIP: It's worth to remind that you can use `php://stdout` or `php://stderr` channels to report Infection's details directly to the console when you use it on CI, for example.
Infection PHP@infection_php12 Nov 2019
The next version of Infection will have an ability to log mutation results directly to stdout/stderr, which is useful for CI. Thank you @duncan3dc
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Thank you @lambdatesting for sponsoring our Open Source work on Infection. We already have 4 companies and a bunch of individuals who support us on GitHub. If you or you company(!) relies on Infection - please support us. github.com/sponsors/infectio… Thank you all.
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Blogged about my hands-on experience with @infection_php Its a short super top level article to give you an overall idea what to expect from it. what do you think about that? feedback welcome. staabm.github.io/2025/08/01/…

Mutation testing with Infection in PHP

Recently I started playing with Infection, a mutation testing framework for PHP. Mutation testing is a technique to evaluate the quality of your tests.

staabm.github.io
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Starting from 0.31.0, Infection doesn't mutate uncovered code by default anymore. Read upgrade guide: github.com/infection/infecti…

Release BC Break: remove --only-covered; Introduce --with-uncovered instead. Change default...

Changed: [BR BREAK!] Remove --only-covered; Introduce --with-uncovered instead by @staabm in #2336 Directly enqueue follow-up processes by @sanmai in #2322 Use executionOrder="defects,random&...

github.com
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