diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..a8e20f9
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,12 @@
+language: php
+
+php:
+  - 7.0
+  - 7.1
+  - 7.2
+
+install:
+  - travis_retry composer install
+
+script:
+  - vendor/bin/phpunit
diff --git a/composer.json b/composer.json
index 8a199a0..f8d65c1 100644
--- a/composer.json
+++ b/composer.json
@@ -18,5 +18,16 @@
         "psr-4": {
             "Colors\\": "src"
         }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Colors\\Tests\\": "tests"
+        }
+    },
+    "require": {
+        "php": "^7.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^6.5"
     }
 }
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..d0f1ccc
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit backupGlobals="false"
+         backupStaticAttributes="false"
+         bootstrap="vendor/autoload.php"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="false"
+         stopOnFailure="false"
+>
+    <testsuites>
+        <testsuite name="RandomColor Test Suite">
+            <directory>./tests</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <whitelist>
+            <directory suffix=".php">src</directory>
+        </whitelist>
+    </filter>
+</phpunit>
diff --git a/src/RandomColor.php b/src/RandomColor.php
index df96204..2a8386b 100644
--- a/src/RandomColor.php
+++ b/src/RandomColor.php
@@ -33,11 +33,11 @@
 
 class RandomColor
 {
-  static public $dictionary = null;
+  public static $dictionary = null;
 
   private function __construct() {}
 
-  static public function one($options = array())
+  public static function one($options = array())
   {
     $h = self::_pickHue($options);
     $s = self::_pickSaturation($h, $options);
@@ -46,7 +46,7 @@ static public function one($options = array())
     return self::format(compact('h','s','v'), @$options['format']);
   }
 
-  static public function many($count, $options = array())
+  public static function many($count, $options = array())
   {
     $colors = array();
 
@@ -58,7 +58,7 @@ static public function many($count, $options = array())
     return $colors;
   }
 
-  static public function format($hsv, $format='hex')
+  public static function format($hsv, $format='hex')
   {
     switch ($format)
     {
@@ -84,7 +84,7 @@ static public function format($hsv, $format='hex')
     }
   }
 
-  static private function _pickHue($options)
+  private static function _pickHue($options)
   {
     $range = self::_getHueRange($options);
 
@@ -105,7 +105,7 @@ static private function _pickHue($options)
     return $hue;
   }
 
-  static private function _pickSaturation($h, $options)
+  private static function _pickSaturation($h, $options)
   {
     if (@$options['hue'] === 'monochrome')
     {
@@ -137,7 +137,7 @@ static private function _pickSaturation($h, $options)
     return self::_rand($range, $options);
   }
 
-  static private function _pickBrightness($h, $s, $options)
+  private static function _pickBrightness($h, $s, $options)
   {
     if (@$options['luminosity'] === 'random')
     {
@@ -165,7 +165,7 @@ static private function _pickBrightness($h, $s, $options)
     return self::_rand($range, $options);
   }
 
-  static private function _getHueRange($options)
+  private static function _getHueRange($options)
   {
     $ranges = array();
 
@@ -212,7 +212,7 @@ static private function _getHueRange($options)
     }
   }
 
-  static private function _getMinimumBrightness($h, $s)
+  private static function _getMinimumBrightness($h, $s)
   {
     $colorInfo = self::_getColorInfo($h);
     $bounds = $colorInfo['bounds'];
@@ -235,7 +235,7 @@ static private function _getMinimumBrightness($h, $s)
     return 0;
   }
 
-  static private function _getColorInfo($h)
+  private static function _getColorInfo($h)
   {
     // Maps red colors to make picking hue easier
     if ($h >= 334 && $h <= 360)
@@ -252,7 +252,7 @@ static private function _getColorInfo($h)
     }
   }
 
-  static private function _rand($bounds, $options)
+  private static function _rand($bounds, $options)
   {
     if (isset($options['prng']))
     {
@@ -264,7 +264,7 @@ static private function _rand($bounds, $options)
     }
   }
 
-  static public function hsv2hex($hsv)
+  public static function hsv2hex($hsv)
   {
     $rgb = self::hsv2rgb($hsv);
     $hex = '#';
@@ -277,7 +277,7 @@ static public function hsv2hex($hsv)
     return $hex;
   }
 
-  static public function hsv2hsl($hsv)
+  public static function hsv2hsl($hsv)
   {
     extract($hsv);
 
@@ -292,7 +292,7 @@ static public function hsv2hsl($hsv)
       );
   }
 
-  static public function hsv2rgb($hsv)
+  public static function hsv2rgb($hsv)
   {
     extract($hsv);
 
@@ -387,4 +387,4 @@ static public function hsv2rgb($hsv)
     'h' => array(283,334),
     's' => array(20,100)
     )
-  );
\ No newline at end of file
+  );
diff --git a/tests/RandomColorTest.php b/tests/RandomColorTest.php
new file mode 100644
index 0000000..9147ad0
--- /dev/null
+++ b/tests/RandomColorTest.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace Colors\Tests;
+
+use Colors\RandomColor;
+use PHPUnit\Framework\TestCase;
+
+class RandomColorTest extends TestCase
+{
+    public function testOneShouldReturnRandomColor()
+    {
+        $hexColor = RandomColor::one();
+
+        $this->assertContains('#', $hexColor);
+        $this->assertSame(7, strlen($hexColor));
+        $this->assertRegExp('/#\w{6}/', $hexColor);
+    }
+
+    public function testManyShouldReturnTenGreenColors()
+    {
+        $hexColors = RandomColor::many(10, [
+            'hue' => 'green',
+        ]);
+
+        $this->assertCount(10, $hexColors);
+        foreach ($hexColors as $hexColor) {
+            $this->assertContains('#', $hexColor);
+            $this->assertSame(7, strlen($hexColor));
+            $this->assertRegExp('/#\w{6}/', $hexColor);
+        }
+    }
+
+    public function testOneShouldReturnRandomLightBlueColor()
+    {
+        $hexColor = RandomColor::one([
+            'luminosity' => 'light',
+            'hue' => 'blue',
+        ]);
+
+        $this->assertContains('#', $hexColor);
+        $this->assertSame(7, strlen($hexColor));
+        $this->assertRegExp('/#\w{6}/', $hexColor);
+    }
+
+    public function testOneShouldReturnRandomLightBlueOrYellowColor()
+    {
+        $hexColor = RandomColor::one([
+            'hue' => ['yellow', 'blue'],
+        ]);
+
+        $this->assertContains('#', $hexColor);
+        $this->assertSame(7, strlen($hexColor));
+        $this->assertRegExp('/#\w{6}/', $hexColor);
+    }
+
+    public function testOneShouldReturnTrulyRandomColor()
+    {
+        $hexColor = RandomColor::one([
+            'luminosity' => 'random',
+            'hue' => 'random',
+        ]);
+
+        $this->assertContains('#', $hexColor);
+        $this->assertSame(7, strlen($hexColor));
+        $this->assertRegExp('/#\w{6}/', $hexColor);
+    }
+
+    public function testOneShouldReturnRandomBrightRgbColor()
+    {
+        $hexColor = RandomColor::one([
+            'luminosity' => 'bright',
+            'format' => 'rgbCss',
+        ]);
+
+        $this->assertContains('rgb(', $hexColor);
+        $this->assertContains(')', $hexColor);
+        $this->assertContains(',', $hexColor);
+        $this->assertRegExp('/rgb\( *(\d{1,3} *, *\d{1,3} *, *\d{1,3}) *\)/i', $hexColor);
+    }
+}