diff --git a/.gitattributes b/.gitattributes
index 487a6337..b078d9ea 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,4 +1,5 @@
 .*               export-ignore
+infection.json   export-ignore
 Makefile         export-ignore
 phpstan.neon     export-ignore
 phpunit.xml.dist export-ignore
diff --git a/.github/settings.yml b/.github/settings.yml
index 84f44dbb..415f20c8 100644
--- a/.github/settings.yml
+++ b/.github/settings.yml
@@ -21,6 +21,8 @@ branches:
           - "Tests (7.4, lowest)"
           - "Tests (7.4, highest)"
           - "Code Coverage (7.4)"
+          - "Mutation Tests (7.4)"
+          - "Mutation Tests (7.4)"
         strict: true
 
       required_pull_request_reviews: null
diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 76ba1329..a3f1774c 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -182,3 +182,38 @@ jobs:
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         run: bash <(curl -s https://codecov.io/bash)
+
+  mutation-tests:
+    name: "Mutation Tests"
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version:
+          - 7.4
+
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v1
+
+      - name: "Install PHP with extensions"
+        uses: shivammathur/setup-php@v1
+        with:
+          coverage: pcov
+          extensions: "mbstring"
+          php-version: ${{ matrix.php-version }}
+
+      - name: "Cache dependencies installed with composer"
+        uses: actions/cache@v1
+        with:
+          path: ~/.composer/cache
+          key: php${{ matrix.php-version }}-composer-
+          restore-keys: |
+            php${{ matrix.php-version }}-composer-
+
+      - name: "Install locked dependencies with composer"
+        run: composer install --no-interaction --no-progress --no-suggest
+
+      - name: "Run mutation tests with pcov and infection/infection"
+        run: vendor/bin/infection --ignore-msi-with-no-mutations --min-covered-msi=25 --min-msi=18
diff --git a/infection.json b/infection.json
new file mode 100644
index 00000000..418c43a3
--- /dev/null
+++ b/infection.json
@@ -0,0 +1,11 @@
+{
+  "timeout": 10,
+  "source": {
+    "directories": [
+      "src"
+    ]
+  },
+  "logs": {
+    "text": "build/infection/infection-log.txt"
+  }
+}
diff --git a/vendor-bin/test/composer.json b/vendor-bin/test/composer.json
index 97741b9e..5aeb8b8b 100644
--- a/vendor-bin/test/composer.json
+++ b/vendor-bin/test/composer.json
@@ -1,5 +1,6 @@
 {
     "require": {
+        "infection/infection": "^0.15",
         "matthiasnoback/symfony-dependency-injection-test": "^4.0",
         "phpunit/phpunit": "^8.2",
         "symfony/phpunit-bridge": "^4.1"