diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 170c4dc..16de44f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -6,7 +6,6 @@ on:
       - 'CHANGELOG.md'
       - '.gitignore'
       - '.gitattributes'
-      - 'infection.json.dist'
       - 'psalm.xml'
 
   push:
@@ -17,7 +16,6 @@ on:
       - 'CHANGELOG.md'
       - '.gitignore'
       - '.gitattributes'
-      - 'infection.json.dist'
       - 'psalm.xml'
 
 name: build
diff --git a/.github/workflows/composer-dependency-analyzer.yml b/.github/workflows/composer-dependency-analyzer.yml
index f45fcc4..973be4b 100644
--- a/.github/workflows/composer-dependency-analyzer.yml
+++ b/.github/workflows/composer-dependency-analyzer.yml
@@ -6,7 +6,6 @@ on:
       - 'CHANGELOG.md'
       - '.gitignore'
       - '.gitattributes'
-      - 'infection.json.dist'
       - 'phpunit.xml.dist'
       - 'psalm.xml'
 
@@ -18,7 +17,6 @@ on:
       - 'CHANGELOG.md'
       - '.gitignore'
       - '.gitattributes'
-      - 'infection.json.dist'
       - 'phpunit.xml.dist'
       - 'psalm.xml'
 
diff --git a/.github/workflows/static.yml b/.github/workflows/static.yml
index 767f251..5eba8a9 100644
--- a/.github/workflows/static.yml
+++ b/.github/workflows/static.yml
@@ -6,7 +6,6 @@ on:
       - 'CHANGELOG.md'
       - '.gitignore'
       - '.gitattributes'
-      - 'infection.json.dist'
       - 'phpunit.xml.dist'
 
   push:
@@ -17,7 +16,6 @@ on:
       - 'CHANGELOG.md'
       - '.gitignore'
       - '.gitattributes'
-      - 'infection.json.dist'
       - 'phpunit.xml.dist'
 
 name: static analysis
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd84164..bc7dac6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 - New #421: Improve `prod-deploy` error handling so exact error is printed in case of rollback (@samdark)
 - Enh #424: Refactor `Makefile` default command help logic (@samdark)
 - Enh #435: Set locale `C.UTF-8` in `Dockerfile` (@vjik)
+- Chg #436: Remove mutation testing (@samdark)
 
 ## 1.1.0 December 20, 2025
 
diff --git a/composer.json b/composer.json
index 3320f93..9473d5a 100644
--- a/composer.json
+++ b/composer.json
@@ -76,7 +76,6 @@
         "friendsofphp/php-cs-fixer": "^3.92.3",
         "phpunit/phpunit": "^11.5.46",
         "rector/rector": "^2.2.14",
-        "roave/infection-static-analysis-plugin": "^1.40",
         "roave/security-advisories": "dev-latest",
         "shipmonk/composer-dependency-analyser": "^1.8.4",
         "vimeo/psalm": "^6.14.2"
@@ -99,7 +98,6 @@
         "bump-after-update": true,
         "allow-plugins": {
             "yiisoft/config": true,
-            "infection/extension-installer": true,
             "codeception/c3": true,
             "composer/installers": true
         }