diff --git a/README.md b/README.md
index c57bb09..3ff19f7 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Laps — light WordPress profiler
 [![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/Rarst/laps/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/Rarst/laps/?branch=master)
+[![Build Status](https://scrutinizer-ci.com/g/Rarst/laps/badges/build.png?b=master)](https://scrutinizer-ci.com/g/Rarst/laps/build-status/master)
+[![Code Coverage](https://scrutinizer-ci.com/g/Rarst/laps/badges/coverage.png?b=master)](https://scrutinizer-ci.com/g/Rarst/laps/?branch=master)
 [![Latest Stable Version](https://poser.pugx.org/rarst/laps/v/stable)](https://packagist.org/packages/rarst/laps)
 [![Total Downloads](https://poser.pugx.org/rarst/laps/downloads)](https://packagist.org/packages/rarst/laps)
 
diff --git a/composer.json b/composer.json
index df4c614..f6f8001 100644
--- a/composer.json
+++ b/composer.json
@@ -19,6 +19,11 @@
 			"Rarst\\Laps\\" : "src/"
 		}
 	},
+	"autoload-dev": {
+		"psr-4": {
+			"Rarst\\Laps\\Tests\\": "tests/"
+		}
+	},
 	"require"    : {
 		"composer/installers": "~1.0",
 		"symfony/stopwatch"  : "^3.4.4",
@@ -26,6 +31,7 @@
 		"pimple/pimple"      : "^3.2.3"
 	},
 	"require-dev": {
-		"twbs/bootstrap": "~3.2"
+		"twbs/bootstrap": "~3.2",
+		"brain/monkey"  : "^2.2"
 	}
 }
diff --git a/composer.lock b/composer.lock
index b3fa2b3..23d7cd3 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": "10f3fc63a5cb37afcc5e4384bc58270a",
+    "content-hash": "6e02995f57446a59552f7e5a84a75278",
     "packages": [
         {
             "name": "composer/installers",
@@ -322,6 +322,224 @@
         }
     ],
     "packages-dev": [
+        {
+            "name": "antecedent/patchwork",
+            "version": "2.1.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/antecedent/patchwork.git",
+                "reference": "00eb113c84fac5446a7d3d1c389aa91fb3da7222"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/antecedent/patchwork/zipball/00eb113c84fac5446a7d3d1c389aa91fb3da7222",
+                "reference": "00eb113c84fac5446a7d3d1c389aa91fb3da7222",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4.0"
+            },
+            "type": "library",
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Ignas Rudaitis",
+                    "email": "ignas.rudaitis@gmail.com"
+                }
+            ],
+            "description": "Method redefinition (monkey-patching) functionality for PHP.",
+            "homepage": "http://patchwork2.org/",
+            "keywords": [
+                "aop",
+                "aspect",
+                "interception",
+                "monkeypatching",
+                "redefinition",
+                "runkit",
+                "testing"
+            ],
+            "time": "2017-12-21T20:03:40+00:00"
+        },
+        {
+            "name": "brain/monkey",
+            "version": "2.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Brain-WP/BrainMonkey.git",
+                "reference": "ed9e0698bc1292f33698719da8ca1aa2e18acc51"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Brain-WP/BrainMonkey/zipball/ed9e0698bc1292f33698719da8ca1aa2e18acc51",
+                "reference": "ed9e0698bc1292f33698719da8ca1aa2e18acc51",
+                "shasum": ""
+            },
+            "require": {
+                "antecedent/patchwork": "^2.0",
+                "mockery/mockery": ">=0.9 <2",
+                "php": ">=5.6.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~5.7.9"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-version/1": "1.x-dev",
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Brain\\Monkey\\": "src/"
+                },
+                "files": [
+                    "inc/api.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Giuseppe Mazzapica",
+                    "email": "giuseppe.mazzapica@gmail.com",
+                    "homepage": "https://gmazzap.me",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Mocking utility for PHP functions and WordPress plugin API",
+            "keywords": [
+                "Monkey Patching",
+                "interception",
+                "mock",
+                "mock functions",
+                "mockery",
+                "patchwork",
+                "redefinition",
+                "runkit",
+                "test",
+                "testing"
+            ],
+            "time": "2017-12-01T16:32:09+00:00"
+        },
+        {
+            "name": "hamcrest/hamcrest-php",
+            "version": "v2.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/hamcrest/hamcrest-php.git",
+                "reference": "776503d3a8e85d4f9a1148614f95b7a608b046ad"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/hamcrest/hamcrest-php/zipball/776503d3a8e85d4f9a1148614f95b7a608b046ad",
+                "reference": "776503d3a8e85d4f9a1148614f95b7a608b046ad",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3|^7.0"
+            },
+            "replace": {
+                "cordoval/hamcrest-php": "*",
+                "davedevelopment/hamcrest-php": "*",
+                "kodova/hamcrest-php": "*"
+            },
+            "require-dev": {
+                "phpunit/php-file-iterator": "1.3.3",
+                "phpunit/phpunit": "~4.0",
+                "satooshi/php-coveralls": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "hamcrest"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD"
+            ],
+            "description": "This is the PHP port of Hamcrest Matchers",
+            "keywords": [
+                "test"
+            ],
+            "time": "2016-01-20T08:20:44+00:00"
+        },
+        {
+            "name": "mockery/mockery",
+            "version": "1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/mockery/mockery.git",
+                "reference": "1bac8c362b12f522fdd1f1fa3556284c91affa38"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/mockery/mockery/zipball/1bac8c362b12f522fdd1f1fa3556284c91affa38",
+                "reference": "1bac8c362b12f522fdd1f1fa3556284c91affa38",
+                "shasum": ""
+            },
+            "require": {
+                "hamcrest/hamcrest-php": "~2.0",
+                "lib-pcre": ">=7.0",
+                "php": ">=5.6.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~5.7|~6.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Mockery": "library/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Pádraic Brady",
+                    "email": "padraic.brady@gmail.com",
+                    "homepage": "http://blog.astrumfutura.com"
+                },
+                {
+                    "name": "Dave Marshall",
+                    "email": "dave.marshall@atstsolutions.co.uk",
+                    "homepage": "http://davedevelopment.co.uk"
+                }
+            ],
+            "description": "Mockery is a simple yet flexible PHP mock object framework for use in unit testing with PHPUnit, PHPSpec or any other testing framework. Its core goal is to offer a test double framework with a succinct API capable of clearly defining all possible object operations and interactions using a human readable Domain Specific Language (DSL). Designed as a drop in alternative to PHPUnit's phpunit-mock-objects library, Mockery is easy to integrate with PHPUnit and can operate alongside phpunit-mock-objects without the World ending.",
+            "homepage": "http://github.com/mockery/mockery",
+            "keywords": [
+                "BDD",
+                "TDD",
+                "library",
+                "mock",
+                "mock objects",
+                "mockery",
+                "stub",
+                "test",
+                "test double",
+                "testing"
+            ],
+            "time": "2017-10-06T16:20:43+00:00"
+        },
         {
             "name": "twbs/bootstrap",
             "version": "v3.3.7",
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..22eed2f
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,12 @@
+<phpunit bootstrap="vendor/autoload.php">
+    <testsuites>
+        <testsuite name="Laps">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">src</directory>
+        </whitelist>
+    </filter>
+</phpunit>
\ No newline at end of file
diff --git a/tests/Asset_ManagerTest.php b/tests/Asset_ManagerTest.php
new file mode 100644
index 0000000..f4f0cfd
--- /dev/null
+++ b/tests/Asset_ManagerTest.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace Rarst\Laps\Tests;
+
+use Brain\Monkey\Functions;
+use Rarst\Laps\Manager\Asset_Manager;
+
+class Asset_ManagerTest extends LapsTestCase {
+
+	public function test__construct() {
+
+		$manager = new Asset_Manager();
+
+		$this->assertTrue( has_action( 'wp_enqueue_scripts', [ $manager, 'enqueue_scripts' ] ) );
+		$this->assertTrue( has_action( 'admin_enqueue_scripts', [ $manager, 'enqueue_scripts' ] ) );
+
+		return $manager;
+	}
+
+
+	/**
+	 * @depends test__construct
+	 */
+	public function testEnqueue_scripts( Asset_Manager $manager ) {
+
+		Functions\expect( 'wp_register_script' )->once();
+		Functions\expect( 'wp_register_style' )->once();
+		Functions\expect( 'plugins_url' )->zeroOrMoreTimes();
+		Functions\expect( 'is_admin_bar_showing' )->once()->andReturn( true );
+		Functions\expect( 'wp_enqueue_script' )->once();
+		Functions\expect( 'wp_enqueue_style' )->once();
+
+		$manager->enqueue_scripts();
+	}
+}
diff --git a/tests/LapsTestCase.php b/tests/LapsTestCase.php
new file mode 100644
index 0000000..d61f578
--- /dev/null
+++ b/tests/LapsTestCase.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Rarst\Laps\Tests;
+
+use Mockery\Adapter\Phpunit\MockeryPHPUnitIntegration;
+use PHPUnit\Framework\TestCase;
+use Brain\Monkey;
+
+class LapsTestCase extends TestCase {
+
+	use MockeryPHPUnitIntegration;
+
+	protected function setUp() {
+		parent::setUp();
+		Monkey\setUp();
+	}
+
+	protected function tearDown() {
+		Monkey\tearDown();
+		parent::tearDown();
+	}
+}