diff --git a/.gitattributes b/.gitattributes
index 49669d1..537ef7d 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -7,6 +7,5 @@ CHANGELOG.md export-ignore
 docker-compose.override.yml.dist export-ignore
 docker-compose.yml export-ignore
 indocker export-ignore
-infection.json export-ignore
 phpcs.xml export-ignore
 phpunit.xml.dist export-ignore
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d466edf..fce44bd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,5 +9,5 @@ on:
 jobs:
   ci:
     uses: shlinkio/github-actions/.github/workflows/php-lib-ci.yml@main
-    secrets:
-      INFECTION_BADGE_API_KEY: ${{ secrets.INFECTION_BADGE_API_KEY }}
+    with:
+      mutation-tests: false
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01c805f..6e631ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,12 +10,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com), and this
 
 ### Changed
 * Update dependencies
+* Update to PHPUnit 11
 
 ### Deprecated
 * *Nothing*
 
 ### Removed
-* *Nothing*
+* Remove infection and mutation tests.
 
 ### Fixed
 * *Nothing*
diff --git a/README.md b/README.md
index c7b9bdf..a2c3392 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,6 @@ Collection of tools to import links from different sources and map them to a shl
 
 [![Build Status](https://img.shields.io/github/actions/workflow/status/shlinkio/shlink-importer/ci.yml?branch=main&logo=github&style=flat-square)](https://github.com/shlinkio/shlink-importer/actions/workflows/ci.yml?query=workflow%3A%22Continuous+integration%22)
 [![Code Coverage](https://img.shields.io/codecov/c/gh/shlinkio/shlink-importer/main?style=flat-square)](https://app.codecov.io/gh/shlinkio/shlink-importer)
-[![Infection MSI](https://img.shields.io/endpoint?style=flat-square&url=https%3A%2F%2Fbadge-api.stryker-mutator.io%2Fgithub.com%2Fshlinkio%2Fshlink-importer%2Fmain)](https://dashboard.stryker-mutator.io/reports/github.com/shlinkio/shlink-importer/main)
 [![Latest Stable Version](https://img.shields.io/github/release/shlinkio/shlink-importer.svg?style=flat-square)](https://packagist.org/packages/shlinkio/shlink-importer)
 [![License](https://img.shields.io/github/license/shlinkio/shlink-importer.svg?style=flat-square)](https://github.com/shlinkio/shlink-importer/blob/main/LICENSE)
 [![Paypal donate](https://img.shields.io/badge/Donate-paypal-blue.svg?style=flat-square&logo=paypal&colorA=aaaaaa)](https://slnk.to/donate)
diff --git a/composer.json b/composer.json
index 7d86e9d..8c9074a 100644
--- a/composer.json
+++ b/composer.json
@@ -22,10 +22,9 @@
     },
     "require-dev": {
         "guzzlehttp/guzzle": "^7.8",
-        "infection/infection": "^0.27.9",
         "phpstan/phpstan": "^1.10",
         "phpstan/phpstan-phpunit": "^1.3",
-        "phpunit/phpunit": "^10.5",
+        "phpunit/phpunit": "^11.0",
         "psr/http-factory": "^1.0",
         "roave/security-advisories": "dev-master",
         "shlinkio/php-coding-standard": "~2.3.0",
@@ -49,35 +48,23 @@
         "ci": [
             "@cs",
             "@stan",
-            "@test:ci",
-            "@infect:ci"
+            "@test:ci"
         ],
         "cs": "phpcs",
         "cs:fix": "phpcbf",
         "stan": "phpstan analyse src test config --level=8",
         "test": "phpunit --order-by=random --testdox --colors=always",
-        "test:ci": "@test --coverage-clover=build/clover.xml --coverage-xml=build/coverage-xml --log-junit=build/junit.xml",
-        "test:pretty": "@test --coverage-html build/coverage-html",
-        "infect": "infection --threads=4 --min-msi=80 --log-verbosity=default --only-covered",
-        "infect:ci": "@infect --coverage=build --skip-initial-tests",
-        "infect:test": [
-            "@test:ci",
-            "@infect:ci"
-        ]
+        "test:ci": "@test --coverage-clover=build/clover.xml",
+        "test:pretty": "@test --coverage-html=build/coverage-html"
     },
     "scripts-descriptions": {
-        "ci": "<fg=blue;options=bold>Alias for \"cs\", \"stan\", \"test:ci\" and \"infect:ci\"</>",
+        "ci": "<fg=blue;options=bold>Alias for \"cs\", \"stan\" and \"test:ci\"</>",
         "cs": "<fg=blue;options=bold>Checks coding styles</>",
         "cs:fix": "<fg=blue;options=bold>Fixes coding styles, when possible</>",
         "stan": "<fg=blue;options=bold>Inspects code with phpstan</>",
         "test": "<fg=blue;options=bold>Runs unit tests with no coverage reports</>",
         "test:ci": "<fg=blue;options=bold>Runs unit tests generating coverage reports and logs</>",
-        "test:pretty": "<fg=blue;options=bold>Runs unit tests generating coverage reports in html</>",
-        "test:infect": "<fg=blue;options=bold>Alias for \"test:ci\" and \"infect:show:ci\"</>",
-        "infect": "<fg=blue;options=bold>Checks unit tests quality applying mutation testing</>",
-        "infect:ci": "<fg=blue;options=bold>Checks unit tests quality applying mutation testing with existing reports and logs</>",
-        "infect:show": "<fg=blue;options=bold>Checks unit tests quality applying mutation testing and shows applied mutators</>",
-        "infect:show:ci": "<fg=blue;options=bold>Checks unit tests quality applying mutation testing with existing reports and logs and shows applied mutators</>"
+        "test:pretty": "<fg=blue;options=bold>Runs unit tests generating coverage reports in html</>"
     },
     "config": {
         "sort-packages": true,
diff --git a/infection.json5 b/infection.json5
deleted file mode 100644
index bcb10ed..0000000
--- a/infection.json5
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-    source: {
-        directories: [
-            'src'
-        ]
-    },
-    timeout: 5,
-    logs: {
-        text: 'build/infection/infection-log.txt',
-        html: 'build/infection/infection-log.html',
-        summary: 'build/infection/summary-log.txt',
-        debug: 'build/infection/debug-log.txt',
-        stryker: {
-            report: 'main'
-        }
-    },
-    tmpDir: 'build/infection/temp',
-    phpUnit: {
-        configDir: '.'
-    },
-    mutators: {
-        '@default': true,
-        IdenticalEqual: false,
-        NotIdenticalNotEqual: false
-    }
-}