diff --git a/.gitignore b/.gitignore
index 57872d0..6e3f37e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /vendor/
+/bin/docker-hostmanager.phar
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..9175a39
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,25 @@
+language: php
+sudo: false
+php: 5.6
+
+cache:
+  directories:
+    - vendor
+    - $HOME/.composer/cache
+
+install: composer install --prefer-source
+
+script: vendor/bin/phpunit --configuration phpunit.xml.dist
+
+before_deploy:
+    - curl -LSs http://box-project.github.io/box2/installer.php | php
+    - php box.phar build
+
+deploy:
+  provider: releases
+  skip_cleanup: true
+  api_key:
+    secure: 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
+  file: bin/docker-hostmanager.phar
+  on:
+    tags: true
diff --git a/README.md b/README.md
index 31e9267..366af39 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ THIS PROJECT IS IN ALPHA STATE
 
 ### USAGE
 
-#### Docker image
+#### Docker image (Recommended)
 
 The easiest way is to use the docker image
 
@@ -33,6 +33,20 @@ i.e.
 $ docker run -d -e DOMAIN_NAME=test.com,www.test.com my_image
 ```
 
+#### PHAR
+
+If you don't want to use the docker image you can download a PHAR executable here : https://github.com/iamluc/docker-hostmanager/releases
+
+And then run it:
+
+```console
+$ php docker-hostmanager.phar synchronize-hosts
+```
+
+### Tests
+
+To run test, execute the following command : `vendor/bin/phpunit`
+
 ### LICENSE
 
 [MIT](https://opensource.org/licenses/MIT)
diff --git a/bin/docker-hostmanager b/bin/docker-hostmanager
index cdbf360..73e6031 100755
--- a/bin/docker-hostmanager
+++ b/bin/docker-hostmanager
@@ -2,14 +2,14 @@
 <?php
 
 if (PHP_SAPI !== 'cli') {
-    die('Warning: buse must be invoked via the CLI version of PHP, not the '.PHP_SAPI.' SAPI'.PHP_EOL);
+    die('Warning: docker-hostmanager must be invoked via the CLI version of PHP, not the '.PHP_SAPI.' SAPI'.PHP_EOL);
 }
 
-require_once __DIR__.'/../vendor/autoload.php';
+require __DIR__.'/../vendor/autoload.php';
 
-$entrypoint = getenv('DOCKER_ENTRYPOINT') ?: 'unix:///var/run/docker.sock';
-$hostsFile = getenv('HOSTS_FILE') ?: '/etc/hosts';
-$tld = getenv('TLD') ?: '.docker';
+use DockerHostManager\Command\RunCommand;
+use Symfony\Component\Console\Application;
 
-$app = new DockerHostManager\Application($entrypoint, $hostsFile, $tld);
-$app->run();
+$application = new Application('DockerHostManager', '@package_version@');
+$application->add(new RunCommand());
+$application->run();
diff --git a/box.json b/box.json
new file mode 100644
index 0000000..af0a3d1
--- /dev/null
+++ b/box.json
@@ -0,0 +1,14 @@
+{
+  "main": "bin/docker-hostmanager",
+  "output": "bin/docker-hostmanager.phar",
+  "finder": [
+    {
+      "name": ["*.php"],
+      "exclude": ["Tests", "tests"],
+      "in": ["src", "vendor"]
+    }
+  ],
+  "chmod": "0755",
+  "stub": true,
+  "git-version": "package_version"
+}
diff --git a/composer.json b/composer.json
index c7565e9..6202181 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,11 @@
     "description": "Update /etc/hosts to access running containers",
     "keywords": ["docker", "hosts", "registry"],
     "require": {
-        "stage1/docker-php": "@dev"
+        "stage1/docker-php": "@dev",
+        "symfony/console": "^3.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^5.1"
     },
     "authors": [
         {
@@ -14,6 +18,6 @@
         }
     ],
     "autoload": {
-        "psr-4": {"DockerHostManager\\": "src/"}
+        "psr-4": {"DockerHostManager\\": "src/", "Test\\": "tests"}
     }
 }
diff --git a/composer.lock b/composer.lock
index 9981c4a..26cf202 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "7d36732bcd717b856d4163451578d50f",
-    "content-hash": "9cca63ca5692e3b5186a8f47fbc08cd4",
+    "hash": "3fad2c8540cb4070d41413f6bef000ad",
+    "content-hash": "cc077c31955d6c25d083852030c94045",
     "packages": [
         {
             "name": "guzzlehttp/guzzle",
@@ -131,12 +131,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/stage1/docker-php.git",
-                "reference": "1d3cda09535c46e88212473d7e4786fc16ff42c2"
+                "reference": "86a417b8cd91a6c031ff9a0a284eb17575fc82be"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/stage1/docker-php/zipball/1d3cda09535c46e88212473d7e4786fc16ff42c2",
-                "reference": "1d3cda09535c46e88212473d7e4786fc16ff42c2",
+                "url": "https://api.github.com/repos/stage1/docker-php/zipball/86a417b8cd91a6c031ff9a0a284eb17575fc82be",
+                "reference": "86a417b8cd91a6c031ff9a0a284eb17575fc82be",
                 "shasum": ""
             },
             "require": {
@@ -160,7 +160,67 @@
                 "MIT"
             ],
             "description": "A Docker PHP client",
-            "time": "2015-11-06 15:03:48"
+            "time": "2015-12-11 10:59:54"
+        },
+        {
+            "name": "symfony/console",
+            "version": "v3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/console.git",
+                "reference": "175871ca8d1ef16ff8d8cac395a1c73afa8d0e63"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/console/zipball/175871ca8d1ef16ff8d8cac395a1c73afa8d0e63",
+                "reference": "175871ca8d1ef16ff8d8cac395a1c73afa8d0e63",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5.9",
+                "symfony/polyfill-mbstring": "~1.0"
+            },
+            "require-dev": {
+                "psr/log": "~1.0",
+                "symfony/event-dispatcher": "~2.8|~3.0",
+                "symfony/process": "~2.8|~3.0"
+            },
+            "suggest": {
+                "psr/log": "For using the console logger",
+                "symfony/event-dispatcher": "",
+                "symfony/process": ""
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Console\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Console Component",
+            "homepage": "https://symfony.com",
+            "time": "2015-11-30 12:36:17"
         },
         {
             "name": "symfony/filesystem",
@@ -211,6 +271,62 @@
             "homepage": "https://symfony.com",
             "time": "2015-11-23 10:19:46"
         },
+        {
+            "name": "symfony/polyfill-mbstring",
+            "version": "v1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-mbstring.git",
+                "reference": "0b6a8940385311a24e060ec1fe35680e17c74497"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/0b6a8940385311a24e060ec1fe35680e17c74497",
+                "reference": "0b6a8940385311a24e060ec1fe35680e17c74497",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Mbstring\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for the Mbstring extension",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "mbstring",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "time": "2015-11-04 20:28:58"
+        },
         {
             "name": "symfony/process",
             "version": "v2.8.0",
@@ -261,7 +377,1045 @@
             "time": "2015-11-30 12:35:10"
         }
     ],
-    "packages-dev": [],
+    "packages-dev": [
+        {
+            "name": "doctrine/instantiator",
+            "version": "1.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/instantiator.git",
+                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/8e884e78f9f0eb1329e445619e04456e64d8051d",
+                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3,<8.0-DEV"
+            },
+            "require-dev": {
+                "athletic/athletic": "~0.1.8",
+                "ext-pdo": "*",
+                "ext-phar": "*",
+                "phpunit/phpunit": "~4.0",
+                "squizlabs/php_codesniffer": "~2.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Instantiator\\": "src/Doctrine/Instantiator/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Marco Pivetta",
+                    "email": "ocramius@gmail.com",
+                    "homepage": "http://ocramius.github.com/"
+                }
+            ],
+            "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
+            "homepage": "https://github.com/doctrine/instantiator",
+            "keywords": [
+                "constructor",
+                "instantiate"
+            ],
+            "time": "2015-06-14 21:17:01"
+        },
+        {
+            "name": "myclabs/deep-copy",
+            "version": "1.5.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/myclabs/DeepCopy.git",
+                "reference": "e3abefcd7f106677fd352cd7c187d6c969aa9ddc"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/e3abefcd7f106677fd352cd7c187d6c969aa9ddc",
+                "reference": "e3abefcd7f106677fd352cd7c187d6c969aa9ddc",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4.0"
+            },
+            "require-dev": {
+                "doctrine/collections": "1.*",
+                "phpunit/phpunit": "~4.1"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "DeepCopy\\": "src/DeepCopy/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "Create deep copies (clones) of your objects",
+            "homepage": "https://github.com/myclabs/DeepCopy",
+            "keywords": [
+                "clone",
+                "copy",
+                "duplicate",
+                "object",
+                "object graph"
+            ],
+            "time": "2015-11-07 22:20:37"
+        },
+        {
+            "name": "phpdocumentor/reflection-docblock",
+            "version": "2.0.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpDocumentor/ReflectionDocBlock.git",
+                "reference": "d68dbdc53dc358a816f00b300704702b2eaff7b8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/d68dbdc53dc358a816f00b300704702b2eaff7b8",
+                "reference": "d68dbdc53dc358a816f00b300704702b2eaff7b8",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.0"
+            },
+            "suggest": {
+                "dflydev/markdown": "~1.0",
+                "erusev/parsedown": "~1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "phpDocumentor": [
+                        "src/"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mike van Riel",
+                    "email": "mike.vanriel@naenius.com"
+                }
+            ],
+            "time": "2015-02-03 12:10:50"
+        },
+        {
+            "name": "phpspec/prophecy",
+            "version": "v1.5.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpspec/prophecy.git",
+                "reference": "4745ded9307786b730d7a60df5cb5a6c43cf95f7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/4745ded9307786b730d7a60df5cb5a6c43cf95f7",
+                "reference": "4745ded9307786b730d7a60df5cb5a6c43cf95f7",
+                "shasum": ""
+            },
+            "require": {
+                "doctrine/instantiator": "^1.0.2",
+                "phpdocumentor/reflection-docblock": "~2.0",
+                "sebastian/comparator": "~1.1"
+            },
+            "require-dev": {
+                "phpspec/phpspec": "~2.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.4.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Prophecy\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Konstantin Kudryashov",
+                    "email": "ever.zet@gmail.com",
+                    "homepage": "http://everzet.com"
+                },
+                {
+                    "name": "Marcello Duarte",
+                    "email": "marcello.duarte@gmail.com"
+                }
+            ],
+            "description": "Highly opinionated mocking framework for PHP 5.3+",
+            "homepage": "https://github.com/phpspec/prophecy",
+            "keywords": [
+                "Double",
+                "Dummy",
+                "fake",
+                "mock",
+                "spy",
+                "stub"
+            ],
+            "time": "2015-08-13 10:07:40"
+        },
+        {
+            "name": "phpunit/php-code-coverage",
+            "version": "3.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
+                "reference": "f7bb5cddf4ffe113eeb737b05241adb947b43f9d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/f7bb5cddf4ffe113eeb737b05241adb947b43f9d",
+                "reference": "f7bb5cddf4ffe113eeb737b05241adb947b43f9d",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6",
+                "phpunit/php-file-iterator": "~1.3",
+                "phpunit/php-text-template": "~1.2",
+                "phpunit/php-token-stream": "~1.3",
+                "sebastian/environment": "^1.3.2",
+                "sebastian/version": "~1.0"
+            },
+            "require-dev": {
+                "ext-xdebug": ">=2.1.4",
+                "phpunit/phpunit": "~5"
+            },
+            "suggest": {
+                "ext-dom": "*",
+                "ext-xdebug": ">=2.2.1",
+                "ext-xmlwriter": "*"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sb@sebastian-bergmann.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that provides collection, processing, and rendering functionality for PHP code coverage information.",
+            "homepage": "https://github.com/sebastianbergmann/php-code-coverage",
+            "keywords": [
+                "coverage",
+                "testing",
+                "xunit"
+            ],
+            "time": "2015-11-12 21:08:20"
+        },
+        {
+            "name": "phpunit/php-file-iterator",
+            "version": "1.4.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-file-iterator.git",
+                "reference": "6150bf2c35d3fc379e50c7602b75caceaa39dbf0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-file-iterator/zipball/6150bf2c35d3fc379e50c7602b75caceaa39dbf0",
+                "reference": "6150bf2c35d3fc379e50c7602b75caceaa39dbf0",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.4.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sb@sebastian-bergmann.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "FilterIterator implementation that filters files based on a list of suffixes.",
+            "homepage": "https://github.com/sebastianbergmann/php-file-iterator/",
+            "keywords": [
+                "filesystem",
+                "iterator"
+            ],
+            "time": "2015-06-21 13:08:43"
+        },
+        {
+            "name": "phpunit/php-text-template",
+            "version": "1.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-text-template.git",
+                "reference": "31f8b717e51d9a2afca6c9f046f5d69fc27c8686"
+            },
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+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/177a015cb0e19ff4a49e0e2e2c5fc1c1bee07002",
+                "reference": "177a015cb0e19ff4a49e0e2e2c5fc1c1bee07002",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5.9"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Yaml\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Yaml Component",
+            "homepage": "https://symfony.com",
+            "time": "2015-11-30 12:36:17"
+        }
+    ],
     "aliases": [],
     "minimum-stability": "stable",
     "stability-flags": {
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
new file mode 100644
index 0000000..83b4849
--- /dev/null
+++ b/phpunit.xml.dist
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<phpunit
+        backupGlobals="false"
+        backupStaticAttributes="false"
+        colors="true"
+        convertErrorsToExceptions="true"
+        convertNoticesToExceptions="true"
+        convertWarningsToExceptions="true"
+        processIsolation="false"
+        stopOnFailure="false"
+        syntaxCheck="false"
+        bootstrap="tests/bootstrap.php">
+    <testsuites>
+        <testsuite name="DockerHostManager Test Suite">
+            <directory suffix="Test.php">tests</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/src/Command/RunCommand.php b/src/Command/RunCommand.php
new file mode 100644
index 0000000..ac55696
--- /dev/null
+++ b/src/Command/RunCommand.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace DockerHostManager\Command;
+
+use DockerHostManager\Application;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class RunCommand extends Command
+{
+    protected function configure()
+    {
+        $this
+            ->setName('synchronize-hosts')
+            ->setDescription('Run the application')
+            ->addArgument(
+                'entrypoint',
+                InputArgument::OPTIONAL,
+                'The docker entrypoint',
+                getenv('DOCKER_ENTRYPOINT') ?: 'unix:///var/run/docker.sock'
+            )
+            ->addArgument(
+                'hosts_file',
+                InputArgument::OPTIONAL,
+                'The host file to update',
+                getenv('HOSTS_FILE') ?: '/etc/hosts'
+            )
+            ->addArgument(
+                'tld',
+                InputArgument::OPTIONAL,
+                'The TLD to use',
+                getenv('TLD') ?: '.docker'
+            )
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $app = new Application(
+            $input->getArgument('entrypoint'),
+            $input->getArgument('hosts_file'),
+            $input->getArgument('tld')
+        );
+
+        $app->run();
+    }
+}
diff --git a/tests/DockerHostManager/ApplicationTest.php b/tests/DockerHostManager/ApplicationTest.php
new file mode 100644
index 0000000..6b6445f
--- /dev/null
+++ b/tests/DockerHostManager/ApplicationTest.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Test\DockerHostManager;
+
+use Docker\Docker;
+use Docker\Http\DockerClient;
+use DockerHostManager\Application;
+use Test\Utils\PropertyAccessor;
+
+class ApplicationTest extends \PHPUnit_Framework_TestCase
+{
+    public function testThatAppCanBeConstructed()
+    {
+        $application = new Application('unix:///var/run/docker.sock', '/etc/hosts', 'docker');
+
+        $this->assertSame('unix:///var/run/docker.sock', PropertyAccessor::getProperty($application, 'entrypoint'));
+        $this->assertSame('/etc/hosts', PropertyAccessor::getProperty($application, 'hostsFile'));
+        $this->assertSame('docker', PropertyAccessor::getProperty($application, 'tld'));
+        $this->assertInstanceOf(Docker::class, PropertyAccessor::getProperty($application, 'docker'));
+        $this->assertInternalType('array', PropertyAccessor::getProperty($application, 'activeContainers'));
+    }
+}
diff --git a/tests/Utils/PropertyAccessor.php b/tests/Utils/PropertyAccessor.php
new file mode 100644
index 0000000..756d5fd
--- /dev/null
+++ b/tests/Utils/PropertyAccessor.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace Test\Utils;
+
+class PropertyAccessor
+{
+    public static function getProperty($object, $property)
+    {
+        if (!is_object($object)) {
+            throw new \InvalidArgumentException(
+                sprintf('The first parameter must be an object: "%s" given.', gettype($object))
+            );
+        }
+
+        $reflection = new \ReflectionProperty($object, $property);
+        $reflection->setAccessible(true);
+
+        return $reflection->getValue($object);
+    }
+}
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
new file mode 100644
index 0000000..d21c14d
--- /dev/null
+++ b/tests/bootstrap.php
@@ -0,0 +1,3 @@
+<?php
+
+require __DIR__ . '/../vendor/autoload.php';