diff --git a/.gitignore b/.gitignore
index 7a35199..a62ffa5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,5 +3,6 @@
 tmp-phpqa
 coverage
 coverage.xml
+infection.log
 composer.lock
 vendor
diff --git a/.travis.yml b/.travis.yml
index bbc76bc..abbaad6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,6 +15,8 @@ before_script:
 script:
  - vendor/bin/phpunit --coverage-text
  - vendor/bin/psalm --threads=8 --no-cache
+ - vendor/bin/infection
+ - cat infection.log
 
 matrix:
   allow_failures:
diff --git a/Makefile b/Makefile
index 3fc5ecd..eeaa4cf 100644
--- a/Makefile
+++ b/Makefile
@@ -1,27 +1,30 @@
 composer-install:
-	PHP_VERSION=7.4 docker-compose run --rm composer composer install
+	PHP_VERSION=74 docker-compose run --rm composer composer install
 composer-update:
-	PHP_VERSION=7.4 docker-compose run --rm composer composer update
+	PHP_VERSION=74 docker-compose run --rm composer composer update
 composer-require:
-	PHP_VERSION=7.4 docker-compose run --rm composer composer require ${PACKAGE}
+	PHP_VERSION=74 docker-compose run --rm composer composer require ${PACKAGE}
 composer-require-dev:
-	PHP_VERSION=7.4 docker-compose run --rm composer composer require --dev ${PACKAGE}
+	PHP_VERSION=74 docker-compose run --rm composer composer require --dev ${PACKAGE}
 
 test: test-phpunit
 test-phpunit:
-	PHP_VERSION=7.4 docker-compose run --rm php php -v
-	PHP_VERSION=7.4 docker-compose run --rm php php vendor/bin/phpunit --coverage-text
-	PHP_VERSION=7.4 docker-compose run --rm php php vendor/bin/psalm --no-cache
+	PHP_VERSION=74 docker-compose run --rm php php -v
+	PHP_VERSION=74 docker-compose run --rm php php vendor/bin/phpunit --coverage-text
+	make qa-psalm
+	make qa-infection
 test-phpunit-local:
 	php -v
 	php vendor/bin/phpunit --coverage-text
+	php vendor/bin/psalm --no-cache
+	php vendor/bin/infection
 
 travis:
-	PHP_VERSION=7.1.3 make travis-job
-	PHP_VERSION=7.2 make travis-job
-	PHP_VERSION=7.3 make travis-job
-	PHP_VERSION=7.4 make travis-job
-	PHP_VERSION=7.4 docker-compose run --rm composer composer config --unset platform
+	PHP_VERSION=71 make travis-job
+	PHP_VERSION=72 make travis-job
+	PHP_VERSION=73 make travis-job
+	PHP_VERSION=74 make travis-job
+	PHP_VERSION=74 docker-compose run --rm composer composer config --unset platform
 travis-job:
 	docker-compose run --rm composer composer config platform.php ${PHP_VERSION}
 	docker-compose run --rm composer composer update -q
@@ -30,7 +33,9 @@ travis-job:
 	PHP_VERSION=${PHP_VERSION} docker-compose run --rm php php vendor/bin/psalm --no-cache
 
 qa-psalm:
-	PHP_VERSION=7.4 docker-compose run --rm php php vendor/bin/psalm --no-cache
+	PHP_VERSION=74 docker-compose run --rm php php vendor/bin/psalm --no-cache
+qa-infection:
+	PHP_VERSION=74 docker-compose run --rm php php vendor/bin/infection
 
 run-php:
-	PHP_VERSION=7.4 docker-compose run --rm php php ${FILE}
+	PHP_VERSION=74 docker-compose run --rm php php ${FILE}
diff --git a/composer.json b/composer.json
index dd4b778..dc903e8 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,8 @@
         "hirak/prestissimo": "^0.3.8",
         "vimeo/psalm": "^3.10",
         "doctrine/dbal": "^2.9",
-        "doctrine/orm": "^2.7"
+        "doctrine/orm": "^2.7",
+        "infection/infection": ">=0.13"
     },
     "autoload": {
         "psr-4": {
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 45b99f9..0f6bf83 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -9,7 +9,7 @@ services:
     working_dir: /app
 
   php:
-    image: php:${PHP_VERSION}
+    build: docker/php${PHP_VERSION}-xdebug
     volumes:
       - .:/app
     working_dir: /app
diff --git a/docker/php71-xdebug/Dockerfile b/docker/php71-xdebug/Dockerfile
new file mode 100644
index 0000000..f69ad0e
--- /dev/null
+++ b/docker/php71-xdebug/Dockerfile
@@ -0,0 +1,3 @@
+FROM php:7.1.3
+
+RUN pecl install xdebug && docker-php-ext-enable xdebug
diff --git a/docker/php72-xdebug/Dockerfile b/docker/php72-xdebug/Dockerfile
new file mode 100644
index 0000000..b5a0175
--- /dev/null
+++ b/docker/php72-xdebug/Dockerfile
@@ -0,0 +1,3 @@
+FROM php:7.2
+
+RUN pecl install xdebug && docker-php-ext-enable xdebug
diff --git a/docker/php73-xdebug/Dockerfile b/docker/php73-xdebug/Dockerfile
new file mode 100644
index 0000000..b11ddc1
--- /dev/null
+++ b/docker/php73-xdebug/Dockerfile
@@ -0,0 +1,3 @@
+FROM php:7.3
+
+RUN pecl install xdebug && docker-php-ext-enable xdebug
diff --git a/docker/php74-xdebug/Dockerfile b/docker/php74-xdebug/Dockerfile
new file mode 100644
index 0000000..b67b641
--- /dev/null
+++ b/docker/php74-xdebug/Dockerfile
@@ -0,0 +1,3 @@
+FROM php:7.4
+
+RUN pecl install xdebug && docker-php-ext-enable xdebug
diff --git a/infection.json b/infection.json
new file mode 100644
index 0000000..10a7278
--- /dev/null
+++ b/infection.json
@@ -0,0 +1,12 @@
+{
+    "source": {
+        "directories": ["src"]
+    },
+    "logs": {
+        "text": "infection.log"
+    },
+    "timeout": 10,
+    "mutators": {
+        "@default": true
+    }
+}