diff --git a/.scrutinizer.yml b/.scrutinizer.yml
index fd8c88df..ac639b92 100644
--- a/.scrutinizer.yml
+++ b/.scrutinizer.yml
@@ -1,7 +1,7 @@
 build:
     environment:
         variables:
-            COMPOSER_ROOT_VERSION: '0.9.99'
+            COMPOSER_ROOT_VERSION: '0.10.99'
 
     tests:
         override:
diff --git a/.travis.yml b/.travis.yml
index 783ea147..9c2f5077 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,7 +19,7 @@ matrix:
 before_install:
   - echo "memory_limit=-1" >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini
   - phpenv config-rm xdebug.ini || true
-  - export COMPOSER_ROOT_VERSION=0.9.99
+  - export COMPOSER_ROOT_VERSION=0.10.99
   - |
     if [ 'false' == "$TRAVIS_PULL_REQUEST" ]; then
       cp box.json.dist box.json
diff --git a/Makefile b/Makefile
index 60a2a998..f96508a7 100644
--- a/Makefile
+++ b/Makefile
@@ -167,16 +167,18 @@ e2e_020: bin/php-scoper.phar fixtures/set020-infection/vendor clover.xml
 	$(PHPBIN) $(PHPSCOPER) add-prefix --working-dir=fixtures/set020-infection \
 		--output-dir=../../build/set020-infection \
 		--force \
-		--no-interaction \
-		--stop-on-failure
+		--no-interaction
 	composer --working-dir=build/set020-infection dump-autoload
 
 	php fixtures/set020-infection/vendor/infection/infection/bin/infection \
 		--coverage=dist/infection-coverage \
 		> build/set020-infection/expected-output
+	sed 's/Time.*//' build/set020-infection/expected-output > build/set020-infection/expected-output
+
 	php build/set020-infection/vendor/infection/infection/bin/infection \
 		--coverage=dist/infection-coverage \
 		> build/set020-infection/output
+	sed 's/Time.*//' build/set020-infection/output > build/set020-infection/output
 
 	diff build/set020-infection/expected-output build/set020-infection/output
 
@@ -294,17 +296,17 @@ tb: bin/php-scoper.phar  vendor
 #---------------------------------------------------------------------------
 
 vendor: composer.lock
-	export COMPOSER_ROOT_VERSION='0.9.99'; composer install
+	export COMPOSER_ROOT_VERSION='0.10.99'; composer install
 	unset "COMPOSER_ROOT_VERSION"
 	touch $@
 
 vendor/bamarni: composer.lock
-	export COMPOSER_ROOT_VERSION='0.9.99'; composer install
+	export COMPOSER_ROOT_VERSION='0.10.99'; composer install
 	unset "COMPOSER_ROOT_VERSION"
 	touch $@
 
 bin/phpunit: composer.lock
-	export COMPOSER_ROOT_VERSION='0.9.99'; composer install
+	export COMPOSER_ROOT_VERSION='0.10.99'; composer install
 	unset "COMPOSER_ROOT_VERSION"
 	touch $@
 
diff --git a/composer.json b/composer.json
index 3f6f6c25..35e5e4b5 100644
--- a/composer.json
+++ b/composer.json
@@ -17,6 +17,8 @@
         }
     ],
 
+    "minimum-stability": "dev",
+    "prefer-stable": true,
     "require": {
         "php": "^7.1",
         "nikic/php-parser": "^4.0",
@@ -28,7 +30,7 @@
     },
     "require-dev": {
         "bamarni/composer-bin-plugin": "^1.1",
-        "humbug/box": "^3.0@rc",
+        "humbug/box": "^3.1",
         "phpunit/phpunit": "^7.0"
     },
     "replace": {
diff --git a/composer.lock b/composer.lock
index ea9ac5e3..3cb26bf2 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,20 +4,20 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "9461985caf0ad2224dd54d8469692771",
+    "content-hash": "9278b515a6fc05661c99c5186ad94f07",
     "packages": [
         {
             "name": "nikic/php-parser",
-            "version": "v4.0.3",
+            "version": "v4.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/nikic/PHP-Parser.git",
-                "reference": "bd088dc940a418f09cda079a9b5c7c478890fb8d"
+                "reference": "d0230c5c77a7e3cfa69446febf340978540958c0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/bd088dc940a418f09cda079a9b5c7c478890fb8d",
-                "reference": "bd088dc940a418f09cda079a9b5c7c478890fb8d",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/d0230c5c77a7e3cfa69446febf340978540958c0",
+                "reference": "d0230c5c77a7e3cfa69446febf340978540958c0",
                 "shasum": ""
             },
             "require": {
@@ -33,7 +33,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "4.1-dev"
                 }
             },
             "autoload": {
@@ -55,7 +55,7 @@
                 "parser",
                 "php"
             ],
-            "time": "2018-07-15T17:25:16+00:00"
+            "time": "2018-10-10T09:24:14+00:00"
         },
         {
             "name": "ocramius/package-versions",
@@ -407,16 +407,16 @@
         },
         {
             "name": "symfony/console",
-            "version": "v3.4.14",
+            "version": "v3.4.17",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "6b217594552b9323bcdcfc14f8a0ce126e84cd73"
+                "reference": "3b2b415d4c48fbefca7dc742aa0a0171bfae4e0b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/6b217594552b9323bcdcfc14f8a0ce126e84cd73",
-                "reference": "6b217594552b9323bcdcfc14f8a0ce126e84cd73",
+                "url": "https://api.github.com/repos/symfony/console/zipball/3b2b415d4c48fbefca7dc742aa0a0171bfae4e0b",
+                "reference": "3b2b415d4c48fbefca7dc742aa0a0171bfae4e0b",
                 "shasum": ""
             },
             "require": {
@@ -472,20 +472,20 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-02T16:33:53+00:00"
         },
         {
             "name": "symfony/debug",
-            "version": "v3.4.14",
+            "version": "v3.4.17",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/debug.git",
-                "reference": "d5a058ff6ecad26b30c1ba452241306ea34c65cc"
+                "reference": "0a612e9dfbd2ccce03eb174365f31ecdca930ff6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/debug/zipball/d5a058ff6ecad26b30c1ba452241306ea34c65cc",
-                "reference": "d5a058ff6ecad26b30c1ba452241306ea34c65cc",
+                "url": "https://api.github.com/repos/symfony/debug/zipball/0a612e9dfbd2ccce03eb174365f31ecdca930ff6",
+                "reference": "0a612e9dfbd2ccce03eb174365f31ecdca930ff6",
                 "shasum": ""
             },
             "require": {
@@ -528,20 +528,20 @@
             ],
             "description": "Symfony Debug Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-02T16:33:53+00:00"
         },
         {
             "name": "symfony/filesystem",
-            "version": "v3.4.14",
+            "version": "v3.4.17",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "a59f917e3c5d82332514cb4538387638f5bde2d6"
+                "reference": "d69930fc337d767607267d57c20a7403d0a822a4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/a59f917e3c5d82332514cb4538387638f5bde2d6",
-                "reference": "a59f917e3c5d82332514cb4538387638f5bde2d6",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/d69930fc337d767607267d57c20a7403d0a822a4",
+                "reference": "d69930fc337d767607267d57c20a7403d0a822a4",
                 "shasum": ""
             },
             "require": {
@@ -578,20 +578,20 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-02T12:28:39+00:00"
         },
         {
             "name": "symfony/finder",
-            "version": "v3.4.14",
+            "version": "v3.4.17",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "8a84fcb207451df0013b2c74cbbf1b62d47b999a"
+                "reference": "54ba444dddc5bd5708a34bd095ea67c6eb54644d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/8a84fcb207451df0013b2c74cbbf1b62d47b999a",
-                "reference": "8a84fcb207451df0013b2c74cbbf1b62d47b999a",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/54ba444dddc5bd5708a34bd095ea67c6eb54644d",
+                "reference": "54ba444dddc5bd5708a34bd095ea67c6eb54644d",
                 "shasum": ""
             },
             "require": {
@@ -627,7 +627,7 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-03T08:46:40+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
@@ -876,24 +876,26 @@
         },
         {
             "name": "amphp/byte-stream",
-            "version": "v1.3.1",
+            "version": "v1.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/amphp/byte-stream.git",
-                "reference": "1b75b122e6f069e7d102eef065dc192119d99ca7"
+                "reference": "17fae3bcecf9b4e7854c4ee41e8d6f58dac5d98d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/amphp/byte-stream/zipball/1b75b122e6f069e7d102eef065dc192119d99ca7",
-                "reference": "1b75b122e6f069e7d102eef065dc192119d99ca7",
+                "url": "https://api.github.com/repos/amphp/byte-stream/zipball/17fae3bcecf9b4e7854c4ee41e8d6f58dac5d98d",
+                "reference": "17fae3bcecf9b4e7854c4ee41e8d6f58dac5d98d",
                 "shasum": ""
             },
             "require": {
                 "amphp/amp": "^2"
             },
             "require-dev": {
+                "amphp/php-cs-fixer-config": "dev-master",
                 "amphp/phpunit-util": "^1",
                 "friendsofphp/php-cs-fixer": "^2.3",
+                "infection/infection": "^0.9.3",
                 "phpunit/phpunit": "^6"
             },
             "type": "library",
@@ -929,7 +931,7 @@
                 "non-blocking",
                 "stream"
             ],
-            "time": "2018-04-04T05:33:09+00:00"
+            "time": "2018-10-03T15:37:23+00:00"
         },
         {
             "name": "amphp/parallel",
@@ -1300,16 +1302,16 @@
         },
         {
             "name": "composer/ca-bundle",
-            "version": "1.1.1",
+            "version": "1.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/ca-bundle.git",
-                "reference": "d2c0a83b7533d6912e8d516756ebd34f893e9169"
+                "reference": "46afded9720f40b9dc63542af4e3e43a1177acb0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/d2c0a83b7533d6912e8d516756ebd34f893e9169",
-                "reference": "d2c0a83b7533d6912e8d516756ebd34f893e9169",
+                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/46afded9720f40b9dc63542af4e3e43a1177acb0",
+                "reference": "46afded9720f40b9dc63542af4e3e43a1177acb0",
                 "shasum": ""
             },
             "require": {
@@ -1352,20 +1354,20 @@
                 "ssl",
                 "tls"
             ],
-            "time": "2018-03-29T19:57:20+00:00"
+            "time": "2018-08-08T08:57:40+00:00"
         },
         {
             "name": "composer/composer",
-            "version": "1.7.0",
+            "version": "1.7.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/composer.git",
-                "reference": "39edb2f375679a4eba19e69e9c9491e302976983"
+                "reference": "576aab9b5abb2ed11a1c52353a759363216a4ad2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/composer/zipball/39edb2f375679a4eba19e69e9c9491e302976983",
-                "reference": "39edb2f375679a4eba19e69e9c9491e302976983",
+                "url": "https://api.github.com/repos/composer/composer/zipball/576aab9b5abb2ed11a1c52353a759363216a4ad2",
+                "reference": "576aab9b5abb2ed11a1c52353a759363216a4ad2",
                 "shasum": ""
             },
             "require": {
@@ -1432,7 +1434,7 @@
                 "dependency",
                 "package"
             ],
-            "time": "2018-08-03T13:39:07+00:00"
+            "time": "2018-08-16T14:57:12+00:00"
         },
         {
             "name": "composer/semver",
@@ -1559,16 +1561,16 @@
         },
         {
             "name": "composer/xdebug-handler",
-            "version": "1.1.0",
+            "version": "1.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/xdebug-handler.git",
-                "reference": "c919dc6c62e221fc6406f861ea13433c0aa24f08"
+                "reference": "b8e9745fb9b06ea6664d8872c4505fb16df4611c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/c919dc6c62e221fc6406f861ea13433c0aa24f08",
-                "reference": "c919dc6c62e221fc6406f861ea13433c0aa24f08",
+                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/b8e9745fb9b06ea6664d8872c4505fb16df4611c",
+                "reference": "b8e9745fb9b06ea6664d8872c4505fb16df4611c",
                 "shasum": ""
             },
             "require": {
@@ -1599,7 +1601,7 @@
                 "Xdebug",
                 "performance"
             ],
-            "time": "2018-04-11T15:42:36+00:00"
+            "time": "2018-08-31T19:07:57+00:00"
         },
         {
             "name": "doctrine/annotations",
@@ -1833,16 +1835,16 @@
         },
         {
             "name": "humbug/box",
-            "version": "3.0.0-RC.0",
+            "version": "3.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/humbug/box.git",
-                "reference": "274dba37a285fc90a403445c725173fe863793b2"
+                "reference": "6dc36fdd2240b81dc65c6e33b1a82d2a63c2eb86"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/humbug/box/zipball/274dba37a285fc90a403445c725173fe863793b2",
-                "reference": "274dba37a285fc90a403445c725173fe863793b2",
+                "url": "https://api.github.com/repos/humbug/box/zipball/6dc36fdd2240b81dc65c6e33b1a82d2a63c2eb86",
+                "reference": "6dc36fdd2240b81dc65c6e33b1a82d2a63c2eb86",
                 "shasum": ""
             },
             "require": {
@@ -1852,11 +1854,11 @@
                 "composer/xdebug-handler": "^1.1.0",
                 "ext-phar": "*",
                 "herrera-io/annotations": "~1.0",
-                "humbug/php-scoper": "^0.9",
+                "humbug/php-scoper": "^0.10",
                 "justinrainbow/json-schema": "^5.2",
                 "nikic/iter": "^1.6",
                 "ocramius/package-versions": "^1.3",
-                "paragonie/pharaoh": "^0.4.0",
+                "paragonie/pharaoh": "dev-master#45f139d",
                 "php": "^7.1",
                 "phpseclib/phpseclib": "~2.0",
                 "seld/jsonlint": "^1.6",
@@ -1868,9 +1870,10 @@
             },
             "require-dev": {
                 "bamarni/composer-bin-plugin": "^1.2",
-                "infection/infection": "^0.9.2",
+                "infection/infection": "^0.10",
                 "mikey179/vfsstream": "^1.1",
-                "phpunit/phpunit": "^7.0"
+                "phpunit/phpunit": "^7.0",
+                "symfony/phpunit-bridge": "^4.1"
             },
             "suggest": {
                 "ext-openssl": "To accelerate private key generation."
@@ -1919,7 +1922,7 @@
             "keywords": [
                 "phar"
             ],
-            "time": "2018-08-06T17:17:03+00:00"
+            "time": "2018-10-09T21:20:46+00:00"
         },
         {
             "name": "justinrainbow/json-schema",
@@ -2081,20 +2084,20 @@
         },
         {
             "name": "opis/closure",
-            "version": "3.0.12",
+            "version": "3.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/opis/closure.git",
-                "reference": "507a28d15e79258d404ba76e73976ba895d0eb11"
+                "reference": "d3209e46ad6c69a969b705df0738fd0dbe26ef9e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/opis/closure/zipball/507a28d15e79258d404ba76e73976ba895d0eb11",
-                "reference": "507a28d15e79258d404ba76e73976ba895d0eb11",
+                "url": "https://api.github.com/repos/opis/closure/zipball/d3209e46ad6c69a969b705df0738fd0dbe26ef9e",
+                "reference": "d3209e46ad6c69a969b705df0738fd0dbe26ef9e",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.4.0"
+                "php": "^5.4 || ^7.0"
             },
             "require-dev": {
                 "jeremeamia/superclosure": "^2.0",
@@ -2122,10 +2125,14 @@
                 {
                     "name": "Marius Sarca",
                     "email": "marius.sarca@gmail.com"
+                },
+                {
+                    "name": "Sorin Sarca",
+                    "email": "sarca_sorin@hotmail.com"
                 }
             ],
             "description": "A library that can be used to serialize closures (anonymous functions) and arbitrary objects.",
-            "homepage": "http://www.opis.io/closure",
+            "homepage": "https://opis.io/closure",
             "keywords": [
                 "anonymous functions",
                 "closure",
@@ -2134,7 +2141,7 @@
                 "serialization",
                 "serialize"
             ],
-            "time": "2018-02-23T08:08:14+00:00"
+            "time": "2018-10-02T13:36:53+00:00"
         },
         {
             "name": "paragonie/constant_time_encoding",
@@ -2200,16 +2207,16 @@
         },
         {
             "name": "paragonie/pharaoh",
-            "version": "v0.4.0",
+            "version": "dev-master",
             "source": {
                 "type": "git",
                 "url": "https://github.com/paragonie/pharaoh.git",
-                "reference": "e2a17756a5eee892ac09ee6d29f64d717ef8713e"
+                "reference": "45f139d77664d5835a3003b8daadd9df97c2d3b5"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/paragonie/pharaoh/zipball/e2a17756a5eee892ac09ee6d29f64d717ef8713e",
-                "reference": "e2a17756a5eee892ac09ee6d29f64d717ef8713e",
+                "url": "https://api.github.com/repos/paragonie/pharaoh/zipball/45f139d77664d5835a3003b8daadd9df97c2d3b5",
+                "reference": "45f139d77664d5835a3003b8daadd9df97c2d3b5",
                 "shasum": ""
             },
             "require": {
@@ -2251,7 +2258,7 @@
                 "tool",
                 "utility"
             ],
-            "time": "2018-08-04T18:01:48+00:00"
+            "time": "2018-08-05T14:34:39+00:00"
         },
         {
             "name": "paragonie/random_compat",
@@ -2300,16 +2307,16 @@
         },
         {
             "name": "paragonie/sodium_compat",
-            "version": "v1.6.3",
+            "version": "v1.7.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/paragonie/sodium_compat.git",
-                "reference": "7d0549c3947eaea620f4e523f42ab236cf7fd304"
+                "reference": "7b73005be3c224f12c47bd75a23ce24b762e47e8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/paragonie/sodium_compat/zipball/7d0549c3947eaea620f4e523f42ab236cf7fd304",
-                "reference": "7d0549c3947eaea620f4e523f42ab236cf7fd304",
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@@ -2639,16 +2646,16 @@
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@@ -2698,25 +2705,28 @@
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+            "time": "2018-10-04T03:41:23+00:00"
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@@ -2745,7 +2755,7 @@
                 "filesystem",
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-            "time": "2018-06-11T11:44:00+00:00"
+            "time": "2018-09-13T20:33:42+00:00"
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@@ -2888,16 +2898,16 @@
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@@ -2922,7 +2932,7 @@
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@@ -2942,7 +2952,7 @@
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@@ -2968,7 +2978,7 @@
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-            "time": "2018-08-03T06:02:45+00:00"
+            "time": "2018-10-05T04:05:24+00:00"
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@@ -3450,25 +3460,25 @@
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-            "version": "1.0.0",
+            "version": "2.0.1",
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                 "url": "https://github.com/sebastianbergmann/resource-operations.git",
-                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52"
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+                "php": "^7.1"
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+                    "dev-master": "2.0-dev"
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@@ -3488,7 +3498,7 @@
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-            "time": "2015-07-28T20:34:47+00:00"
+            "time": "2018-10-04T04:07:39+00:00"
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@@ -3628,16 +3638,16 @@
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+            "version": "v3.4.17",
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                 "url": "https://github.com/symfony/process.git",
-                "reference": "0414db29bd770ec5a4152683e655f55efd4fa60f"
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@@ -3673,20 +3683,20 @@
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-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-02T12:28:39+00:00"
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-            "version": "v3.4.14",
+            "version": "v3.4.17",
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                 "url": "https://github.com/symfony/var-dumper.git",
-                "reference": "f62a394bd3de96f2f5e8f4c7d685035897fb3cb3"
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-                "reference": "f62a394bd3de96f2f5e8f4c7d685035897fb3cb3",
+                "url": "https://api.github.com/repos/symfony/var-dumper/zipball/ff8ac19e97e5c7c3979236b584719a1190f84181",
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@@ -3742,7 +3752,7 @@
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-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-02T16:33:53+00:00"
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@@ -3786,16 +3796,16 @@
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-            "version": "3.2.0",
+            "version": "3.2.1",
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                 "url": "https://github.com/getopt-php/getopt-php.git",
-                "reference": "7e95ab48bd75c595092e1a032a0809f9e1112e8f"
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-                "reference": "7e95ab48bd75c595092e1a032a0809f9e1112e8f",
+                "url": "https://api.github.com/repos/getopt-php/getopt-php/zipball/6d22d6febd672954bf1b9676a4833489c5509116",
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@@ -3828,7 +3838,7 @@
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             "homepage": "http://getopt-php.github.io/getopt-php",
-            "time": "2018-05-31T10:50:50+00:00"
+            "time": "2018-08-17T04:48:55+00:00"
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@@ -3878,11 +3888,9 @@
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     "aliases": [],
-    "minimum-stability": "stable",
-    "stability-flags": {
-        "humbug/box": 5
-    },
-    "prefer-stable": false,
+    "minimum-stability": "dev",
+    "stability-flags": [],
+    "prefer-stable": true,
     "prefer-lowest": false,
     "platform": {
         "php": "^7.1"
diff --git a/fixtures/set020-infection/composer.json b/fixtures/set020-infection/composer.json
index d7569e90..c1371579 100644
--- a/fixtures/set020-infection/composer.json
+++ b/fixtures/set020-infection/composer.json
@@ -1,6 +1,5 @@
 {
     "require": {
-        "infection/infection": "dev-master",
-        "nikic/php-parser": "v3.1.4"
+        "infection/infection": "^0.10"
     }
 }
diff --git a/fixtures/set020-infection/composer.lock b/fixtures/set020-infection/composer.lock
index f9f198ac..05b5b49d 100644
--- a/fixtures/set020-infection/composer.lock
+++ b/fixtures/set020-infection/composer.lock
@@ -1,23 +1,23 @@
 {
     "_readme": [
         "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "a214be5f8de3cc14d0511fba24c8ddd0",
+    "content-hash": "c3c72fb981e399d32d7c370c4da5f76e",
     "packages": [
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-            "version": "1.1.0",
+            "version": "1.1.2",
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-                "reference": "943b2c4fcad1ef178d16a713c2468bf7e579c288"
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-                "reference": "943b2c4fcad1ef178d16a713c2468bf7e579c288",
+                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/46afded9720f40b9dc63542af4e3e43a1177acb0",
+                "reference": "46afded9720f40b9dc63542af4e3e43a1177acb0",
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@@ -26,7 +26,7 @@
                 "php": "^5.3.2 || ^7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.8.35",
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5",
                 "psr/log": "^1.0",
                 "symfony/process": "^2.5 || ^3.0 || ^4.0"
             },
@@ -60,40 +60,88 @@
                 "ssl",
                 "tls"
             ],
-            "time": "2017-11-29T09:37:33+00:00"
+            "time": "2018-08-08T08:57:40+00:00"
+        },
+        {
+            "name": "composer/xdebug-handler",
+            "version": "1.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/xdebug-handler.git",
+                "reference": "b8e9745fb9b06ea6664d8872c4505fb16df4611c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/b8e9745fb9b06ea6664d8872c4505fb16df4611c",
+                "reference": "b8e9745fb9b06ea6664d8872c4505fb16df4611c",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.2 || ^7.0",
+                "psr/log": "^1.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Composer\\XdebugHandler\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "John Stevenson",
+                    "email": "john-stevenson@blueyonder.co.uk"
+                }
+            ],
+            "description": "Restarts a process without xdebug.",
+            "keywords": [
+                "Xdebug",
+                "performance"
+            ],
+            "time": "2018-08-31T19:07:57+00:00"
         },
         {
             "name": "infection/infection",
-            "version": "dev-master",
+            "version": "0.10.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/infection/infection.git",
-                "reference": "955c11e881e3eabaedcb8a41a6b783c9fa1b47f3"
+                "reference": "814780b8f1c78b7a8151afd715eff0cdf75228b5"
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             "dist": {
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-                "url": "https://api.github.com/repos/infection/infection/zipball/955c11e881e3eabaedcb8a41a6b783c9fa1b47f3",
-                "reference": "955c11e881e3eabaedcb8a41a6b783c9fa1b47f3",
+                "url": "https://api.github.com/repos/infection/infection/zipball/814780b8f1c78b7a8151afd715eff0cdf75228b5",
+                "reference": "814780b8f1c78b7a8151afd715eff0cdf75228b5",
                 "shasum": ""
             },
             "require": {
-                "nikic/php-parser": "^3.0",
+                "composer/xdebug-handler": "^1.1",
+                "ext-dom": "*",
+                "nikic/php-parser": "^4.0",
+                "ocramius/package-versions": "^1.2",
                 "padraic/phar-updater": "^1.0.4",
-                "php": "^7.0",
+                "php": "^7.1",
                 "pimple/pimple": "^3.2",
                 "sebastian/diff": "^1.4 || ^2.0 || ^3.0",
                 "symfony/console": "^3.2 || ^4.0",
                 "symfony/filesystem": "^3.2 || ^4.0",
                 "symfony/finder": "^3.2 || ^4.0",
                 "symfony/process": "^3.2 || ^4.0",
-                "symfony/yaml": "^3.2 || ^4.0"
+                "symfony/yaml": "^3.2 || ^4.0",
+                "webmozart/assert": "^1.3"
             },
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                 "symfony/process": "3.4.2"
             },
             "require-dev": {
-                "mockery/mockery": "^1.0",
-                "phpunit/phpunit": "^6.1"
+                "mockery/mockery": "^1.1",
+                "phpunit/phpunit": "^6"
             },
             "bin": [
                 "bin/infection"
@@ -113,6 +161,24 @@
                     "name": "Maks Rafalko",
                     "email": "maks.rafalko@gmail.com",
                     "homepage": "https://twitter.com/maks_rafalko"
+                },
+                {
+                    "name": "Gert de Pagter",
+                    "homepage": "https://github.com/BackEndTea"
+                },
+                {
+                    "name": "Théo FIDRY",
+                    "email": "theo.fidry@gmail.com",
+                    "homepage": "https://twitter.com/tfidry"
+                },
+                {
+                    "name": "Oleg Zhulnev",
+                    "homepage": "https://github.com/sidz"
+                },
+                {
+                    "name": "Alexey Kopytko",
+                    "email": "alexey@kopytko.com",
+                    "homepage": "https://www.alexeykopytko.com"
                 }
             ],
             "description": "Infection is a Mutation Testing framework for PHP. The mutation adequacy score can be used to measure the effectiveness of a test set in terms of its ability to detect faults.",
@@ -124,28 +190,28 @@
                 "testing",
                 "unit testing"
             ],
-            "time": "2018-02-26T18:24:12+00:00"
+            "time": "2018-09-17T12:01:22+00:00"
         },
         {
             "name": "nikic/php-parser",
-            "version": "v3.1.4",
+            "version": "v4.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/nikic/PHP-Parser.git",
-                "reference": "e57b3a09784f846411aa7ed664eedb73e3399078"
+                "reference": "d0230c5c77a7e3cfa69446febf340978540958c0"
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-                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/e57b3a09784f846411aa7ed664eedb73e3399078",
-                "reference": "e57b3a09784f846411aa7ed664eedb73e3399078",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/d0230c5c77a7e3cfa69446febf340978540958c0",
+                "reference": "d0230c5c77a7e3cfa69446febf340978540958c0",
                 "shasum": ""
             },
             "require": {
                 "ext-tokenizer": "*",
-                "php": ">=5.5"
+                "php": ">=7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.0|~5.0"
+                "phpunit/phpunit": "^6.5 || ^7.0"
             },
             "bin": [
                 "bin/php-parse"
@@ -153,7 +219,7 @@
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             "extra": {
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-                    "dev-master": "3.0-dev"
+                    "dev-master": "4.1-dev"
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@@ -175,7 +241,56 @@
                 "parser",
                 "php"
             ],
-            "time": "2018-01-25T21:31:33+00:00"
+            "time": "2018-10-10T09:24:14+00:00"
+        },
+        {
+            "name": "ocramius/package-versions",
+            "version": "1.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Ocramius/PackageVersions.git",
+                "reference": "4489d5002c49d55576fa0ba786f42dbb009be46f"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Ocramius/PackageVersions/zipball/4489d5002c49d55576fa0ba786f42dbb009be46f",
+                "reference": "4489d5002c49d55576fa0ba786f42dbb009be46f",
+                "shasum": ""
+            },
+            "require": {
+                "composer-plugin-api": "^1.0.0",
+                "php": "^7.1.0"
+            },
+            "require-dev": {
+                "composer/composer": "^1.6.3",
+                "ext-zip": "*",
+                "infection/infection": "^0.7.1",
+                "phpunit/phpunit": "^7.0.0"
+            },
+            "type": "composer-plugin",
+            "extra": {
+                "class": "PackageVersions\\Installer",
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "PackageVersions\\": "src/PackageVersions"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Marco Pivetta",
+                    "email": "ocramius@gmail.com"
+                }
+            ],
+            "description": "Composer plugin that provides efficient querying for installed package versions (no runtime IO)",
+            "time": "2018-02-05T13:05:30+00:00"
         },
         {
             "name": "padraic/humbug_get_contents",
@@ -248,16 +363,16 @@
         },
         {
             "name": "padraic/phar-updater",
-            "version": "v1.0.5",
+            "version": "v1.0.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/humbug/phar-updater.git",
-                "reference": "fb9d3b1551a99466f0a74cd264f4c95a8621ac7a"
+                "reference": "d01d3b8f26e541ac9b9eeba1e18d005d852f7ff1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/humbug/phar-updater/zipball/fb9d3b1551a99466f0a74cd264f4c95a8621ac7a",
-                "reference": "fb9d3b1551a99466f0a74cd264f4c95a8621ac7a",
+                "url": "https://api.github.com/repos/humbug/phar-updater/zipball/d01d3b8f26e541ac9b9eeba1e18d005d852f7ff1",
+                "reference": "d01d3b8f26e541ac9b9eeba1e18d005d852f7ff1",
                 "shasum": ""
             },
             "require": {
@@ -284,7 +399,7 @@
             ],
             "authors": [
                 {
-                    "name": "Padraic Brady",
+                    "name": "Pádraic Brady",
                     "email": "padraic.brady@gmail.com",
                     "homepage": "http://blog.astrumfutura.com"
                 }
@@ -296,7 +411,7 @@
                 "self-update",
                 "update"
             ],
-            "time": "2018-02-20T01:18:59+00:00"
+            "time": "2018-03-30T12:52:15+00:00"
         },
         {
             "name": "pimple/pimple",
@@ -397,18 +512,65 @@
             ],
             "time": "2017-02-14T16:28:37+00:00"
         },
+        {
+            "name": "psr/log",
+            "version": "1.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/log.git",
+                "reference": "4ebe3a8bf773a19edfe0a84b6585ba3d401b724d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/log/zipball/4ebe3a8bf773a19edfe0a84b6585ba3d401b724d",
+                "reference": "4ebe3a8bf773a19edfe0a84b6585ba3d401b724d",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Log\\": "Psr/Log/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for logging libraries",
+            "homepage": "https://github.com/php-fig/log",
+            "keywords": [
+                "log",
+                "psr",
+                "psr-3"
+            ],
+            "time": "2016-10-10T12:19:37+00:00"
+        },
         {
             "name": "sebastian/diff",
-            "version": "3.0.0",
+            "version": "3.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/diff.git",
-                "reference": "e09160918c66281713f1c324c1f4c4c3037ba1e8"
+                "reference": "366541b989927187c4ca70490a35615d3fef2dce"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/e09160918c66281713f1c324c1f4c4c3037ba1e8",
-                "reference": "e09160918c66281713f1c324c1f4c4c3037ba1e8",
+                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/366541b989927187c4ca70490a35615d3fef2dce",
+                "reference": "366541b989927187c4ca70490a35615d3fef2dce",
                 "shasum": ""
             },
             "require": {
@@ -451,20 +613,20 @@
                 "unidiff",
                 "unified diff"
             ],
-            "time": "2018-02-01T13:45:15+00:00"
+            "time": "2018-06-10T07:54:39+00:00"
         },
         {
             "name": "symfony/console",
-            "version": "v4.0.4",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "36d5b41e7d4e1ccf0370f6babe966c08ef0a1488"
+                "reference": "dc7122fe5f6113cfaba3b3de575d31112c9aa60b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/36d5b41e7d4e1ccf0370f6babe966c08ef0a1488",
-                "reference": "36d5b41e7d4e1ccf0370f6babe966c08ef0a1488",
+                "url": "https://api.github.com/repos/symfony/console/zipball/dc7122fe5f6113cfaba3b3de575d31112c9aa60b",
+                "reference": "dc7122fe5f6113cfaba3b3de575d31112c9aa60b",
                 "shasum": ""
             },
             "require": {
@@ -484,7 +646,7 @@
                 "symfony/process": "~3.4|~4.0"
             },
             "suggest": {
-                "psr/log": "For using the console logger",
+                "psr/log-implementation": "For using the console logger",
                 "symfony/event-dispatcher": "",
                 "symfony/lock": "",
                 "symfony/process": ""
@@ -492,7 +654,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "4.1-dev"
                 }
             },
             "autoload": {
@@ -519,29 +681,30 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-29T09:06:29+00:00"
+            "time": "2018-10-03T08:15:46+00:00"
         },
         {
             "name": "symfony/filesystem",
-            "version": "v4.0.4",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "760e47a4ee64b4c48f4b30017011e09d4c0f05ed"
+                "reference": "596d12b40624055c300c8b619755b748ca5cf0b5"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/760e47a4ee64b4c48f4b30017011e09d4c0f05ed",
-                "reference": "760e47a4ee64b4c48f4b30017011e09d4c0f05ed",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/596d12b40624055c300c8b619755b748ca5cf0b5",
+                "reference": "596d12b40624055c300c8b619755b748ca5cf0b5",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": "^7.1.3",
+                "symfony/polyfill-ctype": "~1.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "4.1-dev"
                 }
             },
             "autoload": {
@@ -568,20 +731,20 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-03T07:38:00+00:00"
+            "time": "2018-10-02T12:40:59+00:00"
         },
         {
             "name": "symfony/finder",
-            "version": "v4.0.4",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "8b08180f2b7ccb41062366b9ad91fbc4f1af8601"
+                "reference": "1f17195b44543017a9c9b2d437c670627e96ad06"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/8b08180f2b7ccb41062366b9ad91fbc4f1af8601",
-                "reference": "8b08180f2b7ccb41062366b9ad91fbc4f1af8601",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/1f17195b44543017a9c9b2d437c670627e96ad06",
+                "reference": "1f17195b44543017a9c9b2d437c670627e96ad06",
                 "shasum": ""
             },
             "require": {
@@ -590,7 +753,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "4.1-dev"
                 }
             },
             "autoload": {
@@ -617,20 +780,78 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-03T07:38:00+00:00"
+            "time": "2018-10-03T08:47:56+00:00"
+        },
+        {
+            "name": "symfony/polyfill-ctype",
+            "version": "v1.9.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-ctype.git",
+                "reference": "e3d826245268269cd66f8326bd8bc066687b4a19"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/e3d826245268269cd66f8326bd8bc066687b4a19",
+                "reference": "e3d826245268269cd66f8326bd8bc066687b4a19",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "suggest": {
+                "ext-ctype": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.9-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Ctype\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                },
+                {
+                    "name": "Gert de Pagter",
+                    "email": "BackEndTea@gmail.com"
+                }
+            ],
+            "description": "Symfony polyfill for ctype functions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "ctype",
+                "polyfill",
+                "portable"
+            ],
+            "time": "2018-08-06T14:22:27+00:00"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.7.0",
+            "version": "v1.9.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "78be803ce01e55d3491c1397cf1c64beb9c1b63b"
+                "reference": "d0cd638f4634c16d8df4508e847f14e9e43168b8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/78be803ce01e55d3491c1397cf1c64beb9c1b63b",
-                "reference": "78be803ce01e55d3491c1397cf1c64beb9c1b63b",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/d0cd638f4634c16d8df4508e847f14e9e43168b8",
+                "reference": "d0cd638f4634c16d8df4508e847f14e9e43168b8",
                 "shasum": ""
             },
             "require": {
@@ -642,7 +863,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.7-dev"
+                    "dev-master": "1.9-dev"
                 }
             },
             "autoload": {
@@ -676,20 +897,20 @@
                 "portable",
                 "shim"
             ],
-            "time": "2018-01-30T19:27:44+00:00"
+            "time": "2018-08-06T14:22:27+00:00"
         },
         {
             "name": "symfony/process",
-            "version": "v4.0.4",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "e1712002d81de6f39f854bc5bbd9e9f4bb6345b4"
+                "reference": "ee33c0322a8fee0855afcc11fff81e6b1011b529"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/e1712002d81de6f39f854bc5bbd9e9f4bb6345b4",
-                "reference": "e1712002d81de6f39f854bc5bbd9e9f4bb6345b4",
+                "url": "https://api.github.com/repos/symfony/process/zipball/ee33c0322a8fee0855afcc11fff81e6b1011b529",
+                "reference": "ee33c0322a8fee0855afcc11fff81e6b1011b529",
                 "shasum": ""
             },
             "require": {
@@ -698,7 +919,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "4.1-dev"
                 }
             },
             "autoload": {
@@ -725,24 +946,25 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-29T09:06:29+00:00"
+            "time": "2018-10-02T12:40:59+00:00"
         },
         {
             "name": "symfony/yaml",
-            "version": "v4.0.4",
+            "version": "v4.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "ffc60bda1d4a00ec0b32eeabf39dc017bf480028"
+                "reference": "367e689b2fdc19965be435337b50bc8adf2746c9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/ffc60bda1d4a00ec0b32eeabf39dc017bf480028",
-                "reference": "ffc60bda1d4a00ec0b32eeabf39dc017bf480028",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/367e689b2fdc19965be435337b50bc8adf2746c9",
+                "reference": "367e689b2fdc19965be435337b50bc8adf2746c9",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": "^7.1.3",
+                "symfony/polyfill-ctype": "~1.8"
             },
             "conflict": {
                 "symfony/console": "<3.4"
@@ -756,7 +978,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "4.1-dev"
                 }
             },
             "autoload": {
@@ -783,15 +1005,63 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-21T19:06:11+00:00"
+            "time": "2018-10-02T16:36:10+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "0df1908962e7a3071564e857d86874dad1ef204a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/0df1908962e7a3071564e857d86874dad1ef204a",
+                "reference": "0df1908962e7a3071564e857d86874dad1ef204a",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3 || ^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2018-01-29T19:49:41+00:00"
         }
     ],
     "packages-dev": [],
     "aliases": [],
     "minimum-stability": "stable",
-    "stability-flags": {
-        "infection/infection": 20
-    },
+    "stability-flags": [],
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": [],
diff --git a/fixtures/set020-infection/scoper.inc.php b/fixtures/set020-infection/scoper.inc.php
index c3ad00f8..6f5674e9 100644
--- a/fixtures/set020-infection/scoper.inc.php
+++ b/fixtures/set020-infection/scoper.inc.php
@@ -16,17 +16,6 @@
 
 return [
     'patchers' => [
-        function (string $filePath, string $prefix, string $contents): string {
-            //
-            // Infection shared global constant patch
-            // @see https://github.com/humbug/php-scoper/issues/171
-            //
-            if ($filePath === realpath(__DIR__.'/vendor/infection/infection/app/bootstrap.php')) {
-                return str_replace($prefix.'\INFECTION_COMPOSER_INSTALL;', 'INFECTION_COMPOSER_INSTALL;', $contents);
-            }
-
-            return $contents;
-        },
         function (string $filePath, string $prefix, string $contents): string {
             //
             // Infection IncludeInterceptor patch
@@ -39,22 +28,6 @@ function (string $filePath, string $prefix, string $contents): string {
                 );
             }
 
-            return $contents;
-        },
-        function (string $filePath, string $prefix, string $contents): string {
-            //
-            // PHP-Parser patch
-            //
-            if ($filePath === realpath(__DIR__.'/vendor/nikic/php-parser/lib/PhpParser/NodeAbstract.php')) {
-                $length = 15 + strlen($prefix) + 1;
-
-                return preg_replace(
-                    '%strpos\((.+?)\) \+ 15%',
-                    sprintf('strpos($1) + %d', $length),
-                    $contents
-                );
-            }
-
             return $contents;
         },
     ],
diff --git a/infection.json.dist b/infection.json.dist
index 59d84a32..ddce1b91 100644
--- a/infection.json.dist
+++ b/infection.json.dist
@@ -7,5 +7,8 @@
     },
     "logs": {
         "text": "build\/infection-log.txt"
+    },
+    "mutators": {
+        "PublicVisibility": false
     }
 }