diff --git a/.travis.yml b/.travis.yml
index 16c2c44c3327..271252613ae8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,4 +13,4 @@ before_install:
 
 install: travis_retry composer install --no-interaction --no-suggest
 
-script: vendor/bin/paratest -p 4 --max-batch-size 256
+script: vendor/bin/phpunit
diff --git a/composer.json b/composer.json
index d335d9fee01c..b90afdc5c88d 100644
--- a/composer.json
+++ b/composer.json
@@ -58,7 +58,6 @@
     "require-dev": {
         "ext-sqlite3": "*",
         "alt-three/testbench": "^1.11",
-        "brianium/paratest": "^0.15.0",
         "filp/whoops": "^2.1",
         "fzaninotto/faker": "^1.6",
         "graham-campbell/testbench-core": "^1.1",
diff --git a/composer.lock b/composer.lock
index 734402b81120..d172bc65c025 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "70b2147b1fc8086bacd0dff2957d22a1",
+    "content-hash": "cdacb1da413997b10a4ab6fa68abd591",
     "packages": [
         {
             "name": "alt-three/badger",
@@ -4844,168 +4844,6 @@
             ],
             "time": "2017-01-01T12:36:00+00:00"
         },
-        {
-            "name": "brianium/habitat",
-            "version": "v1.0.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/brianium/habitat.git",
-                "reference": "d0979e3bb379cbc78ecb42b3ac171bc2b7e06d96"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/brianium/habitat/zipball/d0979e3bb379cbc78ecb42b3ac171bc2b7e06d96",
-                "reference": "d0979e3bb379cbc78ecb42b3ac171bc2b7e06d96",
-                "shasum": ""
-            },
-            "require-dev": {
-                "monolog/monolog": ">=1.5.0",
-                "phpunit/phpunit": ">=3.7.21"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-0": {
-                    "Habitat": [
-                        "src/"
-                    ]
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Brian",
-                    "email": "scaturrob@gmail.com",
-                    "homepage": "http://brianscaturro.com",
-                    "role": "Lead"
-                }
-            ],
-            "description": "A dependable php environment",
-            "time": "2013-06-08T04:42:29+00:00"
-        },
-        {
-            "name": "brianium/paratest",
-            "version": "0.15.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/brianium/paratest.git",
-                "reference": "13af4ef6631a2638498de9813bbe0f6493ba84ad"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/brianium/paratest/zipball/13af4ef6631a2638498de9813bbe0f6493ba84ad",
-                "reference": "13af4ef6631a2638498de9813bbe0f6493ba84ad",
-                "shasum": ""
-            },
-            "require": {
-                "brianium/habitat": "1.0.0",
-                "composer/semver": "~1.2",
-                "ext-pcre": "*",
-                "ext-reflection": "*",
-                "ext-simplexml": "*",
-                "php": ">=5.5.11",
-                "phpunit/php-timer": ">=1.0.4",
-                "phpunit/phpunit": "~5.0",
-                "symfony/console": "~2.3|~3.0",
-                "symfony/process": "~2.3|~3.0"
-            },
-            "bin": [
-                "bin/paratest"
-            ],
-            "type": "library",
-            "autoload": {
-                "psr-0": {
-                    "ParaTest": [
-                        "src/"
-                    ]
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Brian Scaturro",
-                    "email": "scaturrob@gmail.com",
-                    "homepage": "http://brianscaturro.com",
-                    "role": "Lead"
-                }
-            ],
-            "description": "Parallel testing for PHP",
-            "homepage": "https://github.com/brianium/paratest",
-            "keywords": [
-                "concurrent",
-                "parallel",
-                "phpunit",
-                "testing"
-            ],
-            "time": "2017-06-13T19:50:32+00:00"
-        },
-        {
-            "name": "composer/semver",
-            "version": "1.4.2",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/composer/semver.git",
-                "reference": "c7cb9a2095a074d131b65a8a0cd294479d785573"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/composer/semver/zipball/c7cb9a2095a074d131b65a8a0cd294479d785573",
-                "reference": "c7cb9a2095a074d131b65a8a0cd294479d785573",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^5.3.2 || ^7.0"
-            },
-            "require-dev": {
-                "phpunit/phpunit": "^4.5 || ^5.0.5",
-                "phpunit/phpunit-mock-objects": "2.3.0 || ^3.0"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Composer\\Semver\\": "src"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Nils Adermann",
-                    "email": "naderman@naderman.de",
-                    "homepage": "http://www.naderman.de"
-                },
-                {
-                    "name": "Jordi Boggiano",
-                    "email": "j.boggiano@seld.be",
-                    "homepage": "http://seld.be"
-                },
-                {
-                    "name": "Rob Bast",
-                    "email": "rob.bast@gmail.com",
-                    "homepage": "http://robbast.nl"
-                }
-            ],
-            "description": "Semver library that offers utilities, version constraint parsing and validation.",
-            "keywords": [
-                "semantic",
-                "semver",
-                "validation",
-                "versioning"
-            ],
-            "time": "2016-08-30T16:08:34+00:00"
-        },
         {
             "name": "doctrine/instantiator",
             "version": "1.0.5",