diff --git a/README.md b/README.md
index b11a350..5f849bd 100644
--- a/README.md
+++ b/README.md
@@ -21,12 +21,12 @@ To detect multi-accounts on your website.
 ## Usage
 
 ```php
-use bkrukowski\TransparentEmail\TransparentEmail;
+use bkrukowski\TransparentEmail\TransparentEmailFactory;
 use bkrukowski\TransparentEmail\Emails\Email;
 use bkrukowski\TransparentEmail\Emails\InvalidEmailException;
 
 try {
-    $cleaner = new TransparentEmail();
+    $cleaner = TransparentEmailFactory::createDefault();
     $transformedEmail = $cleaner->getPrimaryEmail(new Email('John.Doe+alias@gmail.com'));
 } catch (InvalidEmailException $exception) {
     // do something
diff --git a/src/TransparentEmail.php b/src/TransparentEmail.php
index 5758b1d..45ca0a1 100644
--- a/src/TransparentEmail.php
+++ b/src/TransparentEmail.php
@@ -7,16 +7,16 @@ namespace bkrukowski\TransparentEmail;
 use bkrukowski\TransparentEmail\Emails\EmailInterface;
 use bkrukowski\TransparentEmail\Services\ServiceInterface;
 
-class TransparentEmail
+class TransparentEmail implements TransparentEmailInterface
 {
     /**
      * @var ServiceCollectorInterface|ServiceInterface[]
      */
     private $services;
 
-    public function __construct(ServiceCollectorInterface $services = null)
+    public function __construct(ServiceCollectorInterface $services)
     {
-        $this->services = $services ?: new DefaultServiceCollector();
+        $this->services = $services;
     }
 
     public function getPrimaryEmail(EmailInterface $email) : EmailInterface
diff --git a/src/DefaultServiceCollector.php b/src/TransparentEmailFactory.php
similarity index 54%
rename from src/DefaultServiceCollector.php
rename to src/TransparentEmailFactory.php
index 239e1ed..8765924 100644
--- a/src/DefaultServiceCollector.php
+++ b/src/TransparentEmailFactory.php
@@ -11,16 +11,25 @@ use bkrukowski\TransparentEmail\Services\TlenPl;
 use bkrukowski\TransparentEmail\Services\Www33MailCom;
 use bkrukowski\TransparentEmail\Services\YahooCom;
 
-class DefaultServiceCollector extends ServiceCollector
+class TransparentEmailFactory
 {
-    public function __construct()
+    public static function createDefault() : TransparentEmailInterface
     {
-        foreach ($this->getAllServicesClasses() as $class) {
-            $this->addService(new $class());
-        }
+        return new TransparentEmail(self::createServiceCollector());
     }
 
-    private function getAllServicesClasses() : array
+    private static function createServiceCollector() : ServiceCollectorInterface
+    {
+        $collector = new ServiceCollector();
+
+        foreach (self::getAllServicesClasses() as $servicesClass) {
+            $collector->addService(new $servicesClass());
+        }
+
+        return $collector;
+    }
+
+    private static function getAllServicesClasses() : array
     {
         return [
             GmailCom::class,
diff --git a/src/TransparentEmailInterface.php b/src/TransparentEmailInterface.php
new file mode 100644
index 0000000..75e5600
--- /dev/null
+++ b/src/TransparentEmailInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace bkrukowski\TransparentEmail;
+
+use bkrukowski\TransparentEmail\Emails\EmailInterface;
+
+interface TransparentEmailInterface
+{
+    public function getPrimaryEmail(EmailInterface $email) : EmailInterface;
+}
\ No newline at end of file
diff --git a/tests/DefaultServiceCollectorTest.php b/tests/DefaultServiceCollectorTest.php
deleted file mode 100644
index c5dab4c..0000000
--- a/tests/DefaultServiceCollectorTest.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace bkrukowski\TransparentEmail\Tests;
-
-use bkrukowski\TransparentEmail\DefaultServiceCollector;
-use bkrukowski\TransparentEmail\Services\ServiceInterface;
-
-class DefaultServiceCollectorTest extends \PHPUnit_Framework_TestCase
-{
-    public function testIterator()
-    {
-        $atLeastOne = false;
-        foreach (new DefaultServiceCollector() as $service) {
-            $atLeastOne = true;
-            $this->assertInstanceOf(ServiceInterface::class, $service);
-        }
-        $this->assertTrue($atLeastOne);
-    }
-}
\ No newline at end of file
diff --git a/tests/TransparentEmailFactoryTest.php b/tests/TransparentEmailFactoryTest.php
new file mode 100644
index 0000000..b54366d
--- /dev/null
+++ b/tests/TransparentEmailFactoryTest.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace bkrukowski\TransparentEmail\Tests;
+
+use bkrukowski\TransparentEmail\Emails\Email;
+use bkrukowski\TransparentEmail\Emails\EmailInterface;
+use bkrukowski\TransparentEmail\TransparentEmailFactory;
+
+class TransparentEmailFactoryTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @dataProvider providerExpectedEmail
+     *
+     * @param EmailInterface $inputEmail
+     * @param string $expectedEmail
+     */
+    public function testExpectedEmail(EmailInterface $inputEmail, string $expectedEmail)
+    {
+        $outputEmail = TransparentEmailFactory::createDefault()->getPrimaryEmail($inputEmail);
+        $this->assertSame($expectedEmail, (string) $outputEmail);
+    }
+
+    public function providerExpectedEmail() : array
+    {
+        return [
+            [new Email('John.Doe+spam@gmail.com', true), 'johndoe@gmail.com'],
+            [new Email('Jane.Doe+spam@outlook.com', true), 'jane.doe@outlook.com'],
+            [new Email('John.Doe@tlen.pl', true), 'john.doe@o2.pl'],
+            [new Email('ALIAS@janedoe.33mail.com', true), 'janedoe@janedoe.33mail.com'],
+            [new Email('John.Doe-facebook@yahoo.com', true), 'john.doe@yahoo.com'],
+        ];
+    }
+}
\ No newline at end of file
diff --git a/tests/TransparentEmailTest.php b/tests/TransparentEmailTest.php
index ae4e760..7a78650 100644
--- a/tests/TransparentEmailTest.php
+++ b/tests/TransparentEmailTest.php
@@ -10,6 +10,7 @@ use bkrukowski\TransparentEmail\ServiceCollector;
 use bkrukowski\TransparentEmail\ServiceCollectorInterface;
 use bkrukowski\TransparentEmail\Services\TlenPl;
 use bkrukowski\TransparentEmail\TransparentEmail;
+use bkrukowski\TransparentEmail\TransparentEmailFactory;
 
 class TransparentEmailTest extends \PHPUnit_Framework_TestCase
 {
@@ -41,12 +42,12 @@ class TransparentEmailTest extends \PHPUnit_Framework_TestCase
                 'john.doe+alias@gmail.com',
                 'john.doe+alias@gmail.com'
             ],
-            [new TransparentEmail(), 'john.doe+alias@gmail.com', 'johndoe@gmail.com'],
+            [TransparentEmailFactory::createDefault(), 'john.doe+alias@gmail.com', 'johndoe@gmail.com'],
             [new TransparentEmail($emptyServiceCollector), 'John.Doe@example.com', 'john.doe@example.com'],
             [new TransparentEmail($emptyServiceCollector), 'John.Doe@example.com', 'John.Doe@example.com', true],
-            [new TransparentEmail(), 'John.Doe@gmail.com', 'johndoe@gmail.com', true],
-            [new TransparentEmail(), 'Jane.Doe+receipts@hotmail.com', 'jane.doe@hotmail.com'],
-            [new TransparentEmail(), 'Jane.Doe-receipts@yahoo.com', 'jane.doe@yahoo.com'],
+            [TransparentEmailFactory::createDefault(), 'John.Doe@gmail.com', 'johndoe@gmail.com', true],
+            [TransparentEmailFactory::createDefault(), 'Jane.Doe+receipts@hotmail.com', 'jane.doe@hotmail.com'],
+            [TransparentEmailFactory::createDefault(), 'Jane.Doe-receipts@yahoo.com', 'jane.doe@yahoo.com'],
         ];
     }
 
@@ -58,7 +59,7 @@ class TransparentEmailTest extends \PHPUnit_Framework_TestCase
      */
     public function testDefault(EmailInterface $inputEmail, string $expectedEmail)
     {
-        $this->assertEquals($expectedEmail, (new TransparentEmail())->getPrimaryEmail($inputEmail));
+        $this->assertEquals($expectedEmail, (TransparentEmailFactory::createDefault())->getPrimaryEmail($inputEmail));
     }
 
     public function providerDefault()