diff --git a/DependencyInjection/MisdPhoneNumberExtension.php b/DependencyInjection/MisdPhoneNumberExtension.php
index 904694c6..e51c86a3 100644
--- a/DependencyInjection/MisdPhoneNumberExtension.php
+++ b/DependencyInjection/MisdPhoneNumberExtension.php
@@ -32,9 +32,9 @@ public function load(array $configs, ContainerBuilder $container)
         $loader->load('services.xml');
         if (interface_exists('Symfony\Component\Templating\Helper\HelperInterface')) {
             $loader->load('templating.xml');
-            if (class_exists('Symfony\Bundle\TwigBundle\TwigBundle')) {
-                $loader->load('twig.xml');
-            }
+        }
+        if (class_exists('Symfony\Bundle\TwigBundle\TwigBundle')) {
+            $loader->load('twig.xml');
         }
         if (interface_exists('Symfony\Component\Form\FormTypeInterface')) {
             $loader->load('form.xml');
diff --git a/Formatter/PhoneNumberFormatter.php b/Formatter/PhoneNumberFormatter.php
new file mode 100644
index 00000000..9274495b
--- /dev/null
+++ b/Formatter/PhoneNumberFormatter.php
@@ -0,0 +1,89 @@
+<?php
+
+/*
+ * This file is part of the Symfony2 PhoneNumberBundle.
+ *
+ * (c) University of Cambridge
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Misd\PhoneNumberBundle\Formatter;
+
+use libphonenumber\PhoneNumber;
+use libphonenumber\PhoneNumberFormat;
+use libphonenumber\PhoneNumberType;
+use libphonenumber\PhoneNumberUtil;
+use Misd\PhoneNumberBundle\Exception\InvalidArgumentException;
+
+/**
+ * Phone number formatter.
+ */
+class PhoneNumberFormatter
+{
+    /**
+     * Phone number utility.
+     *
+     * @var PhoneNumberUtil
+     */
+    protected $phoneNumberUtil;
+
+    /**
+     * Constructor.
+     *
+     * @param PhoneNumberUtil $phoneNumberUtil Phone number utility.
+     */
+    public function __construct(PhoneNumberUtil $phoneNumberUtil)
+    {
+        $this->phoneNumberUtil = $phoneNumberUtil;
+    }
+
+    /**
+     * Format a phone number.
+     *
+     * @param PhoneNumber $phoneNumber Phone number.
+     * @param int|string  $format      Format, or format constant name.
+     *
+     * @return string Formatted phone number.
+     *
+     * @throws InvalidArgumentException If an argument is invalid.
+     */
+    public function format(PhoneNumber $phoneNumber, $format = PhoneNumberFormat::INTERNATIONAL)
+    {
+        if (true === is_string($format)) {
+            $constant = '\libphonenumber\PhoneNumberFormat::' . $format;
+
+            if (false === defined($constant)) {
+                throw new InvalidArgumentException('The format must be either a constant value or name in libphonenumber\PhoneNumberFormat');
+            }
+
+            $format = constant('\libphonenumber\PhoneNumberFormat::' . $format);
+        }
+
+        return $this->phoneNumberUtil->format($phoneNumber, $format);
+    }
+
+    /**
+     * @param PhoneNumber $phoneNumber Phone number.
+     * @param int|string  $type      PhoneNumberType, or PhoneNumberType constant name.
+     *
+     * @return bool
+     *
+     * @throws InvalidArgumentException If type argument is invalid.
+     */
+    public function isType(PhoneNumber $phoneNumber, $type = PhoneNumberType::UNKNOWN)
+    {
+        if (true === is_string($type)) {
+            $constant = '\libphonenumber\PhoneNumberType::' . $type;
+
+            if (false === defined($constant)) {
+                throw new InvalidArgumentException('The format must be either a constant value or name in libphonenumber\PhoneNumberType');
+            }
+
+            $type = constant('\libphonenumber\PhoneNumberType::' . $type);
+        }
+
+        return $this->phoneNumberUtil->getNumberType($phoneNumber) === $type ? true : false;
+    }
+}
diff --git a/Resources/config/services.xml b/Resources/config/services.xml
index f66c7ffb..bfecf1b0 100644
--- a/Resources/config/services.xml
+++ b/Resources/config/services.xml
@@ -30,6 +30,11 @@
         <service id="libphonenumber.phone_number_to_time_zones_mapper" class="libphonenumber\PhoneNumberToTimeZonesMapper"/>
         <service id="libphonenumber\PhoneNumberToTimeZonesMapper" alias="libphonenumber.phone_number_to_time_zones_mapper"/>
 
+        <service id="misd_phone_number.formatter" class="Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter">
+            <argument type="service" id="libphonenumber.phone_number_util"/>
+        </service>
+        <service id="Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter" alias="misd_phone_number.formatter"/>
+
     </services>
 
 </container>
diff --git a/Resources/config/templating.xml b/Resources/config/templating.xml
index 9c7cedae..3166bd9e 100644
--- a/Resources/config/templating.xml
+++ b/Resources/config/templating.xml
@@ -16,7 +16,7 @@
             <tag name="templating.helper" alias="phone_number_helper"/>
             <!-- phone_number_format is deprecated and will be removed in 2.0 (use phone_number_helper instead) -->
             <tag name="templating.helper" alias="phone_number_format"/>
-            <argument type="service" id="libphonenumber.phone_number_util"/>
+            <argument type="service" id="misd_phone_number.formatter"/>
         </service>
         <service id="Misd\PhoneNumberBundle\Templating\Helper\PhoneNumberHelper" alias="misd_phone_number.templating.helper"/>
     </services>
diff --git a/Resources/config/twig.xml b/Resources/config/twig.xml
index 0a2ab6ac..f0619098 100644
--- a/Resources/config/twig.xml
+++ b/Resources/config/twig.xml
@@ -14,7 +14,7 @@
         <service id="misd_phone_number.twig.extension.format" class="Misd\PhoneNumberBundle\Twig\Extension\PhoneNumberHelperExtension"
                  public="false">
             <tag name="twig.extension"/>
-            <argument type="service" id="misd_phone_number.templating.helper"/>
+            <argument type="service" id="misd_phone_number.formatter"/>
         </service>
         <service id="Misd\PhoneNumberBundle\Twig\Extension\PhoneNumberHelperExtension" alias="misd_phone_number.twig.extension.format"/>
     </services>
diff --git a/Templating/Helper/PhoneNumberHelper.php b/Templating/Helper/PhoneNumberHelper.php
index bba7d2fd..5e30b8b7 100644
--- a/Templating/Helper/PhoneNumberHelper.php
+++ b/Templating/Helper/PhoneNumberHelper.php
@@ -15,7 +15,7 @@
 use libphonenumber\PhoneNumberFormat;
 use libphonenumber\PhoneNumberType;
 use libphonenumber\PhoneNumberUtil;
-use Misd\PhoneNumberBundle\Exception\InvalidArgumentException;
+use Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter;
 use Symfony\Component\Templating\Helper\HelperInterface;
 
 /**
@@ -24,11 +24,11 @@
 class PhoneNumberHelper implements HelperInterface
 {
     /**
-     * Phone number utility.
+     * Phone number formatter.
      *
-     * @var PhoneNumberUtil
+     * @var PhoneNumberFormatter
      */
-    protected $phoneNumberUtil;
+    protected $formatter;
 
     /**
      * Charset.
@@ -40,11 +40,15 @@ class PhoneNumberHelper implements HelperInterface
     /**
      * Constructor.
      *
-     * @param PhoneNumberUtil $phoneNumberUtil Phone number utility.
+     * @param PhoneNumberFormatter $formatter Phone number formatter.
      */
-    public function __construct(PhoneNumberUtil $phoneNumberUtil)
+    public function __construct($formatter)
     {
-        $this->phoneNumberUtil = $phoneNumberUtil;
+        if ($formatter instanceof PhoneNumberUtil) {
+            // throw deprecation message
+            $formatter = new PhoneNumberFormatter($formatter);
+        }
+        $this->formatter = $formatter;
     }
 
     /**
@@ -78,22 +82,10 @@ public function getName()
      * @param int|string  $format      Format, or format constant name.
      *
      * @return string Formatted phone number.
-     *
-     * @throws InvalidArgumentException If an argument is invalid.
      */
     public function format(PhoneNumber $phoneNumber, $format = PhoneNumberFormat::INTERNATIONAL)
     {
-        if (true === is_string($format)) {
-            $constant = '\libphonenumber\PhoneNumberFormat::' . $format;
-
-            if (false === defined($constant)) {
-                throw new InvalidArgumentException('The format must be either a constant value or name in libphonenumber\PhoneNumberFormat');
-            }
-
-            $format = constant('\libphonenumber\PhoneNumberFormat::' . $format);
-        }
-
-        return $this->phoneNumberUtil->format($phoneNumber, $format);
+        return $this->formatter->format($phoneNumber, $format);
     }
 
     /**
@@ -101,21 +93,9 @@ public function format(PhoneNumber $phoneNumber, $format = PhoneNumberFormat::IN
      * @param int|string  $type      PhoneNumberType, or PhoneNumberType constant name.
      *
      * @return bool
-     *
-     * @throws InvalidArgumentException If type argument is invalid.
      */
     public function isType(PhoneNumber $phoneNumber, $type = PhoneNumberType::UNKNOWN)
     {
-        if (true === is_string($type)) {
-            $constant = '\libphonenumber\PhoneNumberType::' . $type;
-
-            if (false === defined($constant)) {
-                throw new InvalidArgumentException('The format must be either a constant value or name in libphonenumber\PhoneNumberType');
-            }
-
-            $type = constant('\libphonenumber\PhoneNumberType::' . $type);
-        }
-
-        return $this->phoneNumberUtil->getNumberType($phoneNumber) === $type ? true : false;
+        return $this->formatter->getNumberType($phoneNumber) === $type ? true : false;
     }
 }
diff --git a/Tests/DependencyInjection/MisdPhoneNumberExtensionTest.php b/Tests/DependencyInjection/MisdPhoneNumberExtensionTest.php
index c0398c86..c5e2a4ba 100644
--- a/Tests/DependencyInjection/MisdPhoneNumberExtensionTest.php
+++ b/Tests/DependencyInjection/MisdPhoneNumberExtensionTest.php
@@ -142,6 +142,15 @@ public function testLoad()
             'method' => 'serializePhoneNumber',
           )
         );
+
+        $this->assertHasService(
+            'misd_phone_number.formatter',
+            'Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter'
+        );
+        $this->assertHasService(
+            'Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter',
+            'Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter'
+        );
     }
 
     protected function assertHasService($id, $instanceOf)
diff --git a/Tests/Formatter/PhoneNumberFormatterTest.php b/Tests/Formatter/PhoneNumberFormatterTest.php
new file mode 100644
index 00000000..e8320aed
--- /dev/null
+++ b/Tests/Formatter/PhoneNumberFormatterTest.php
@@ -0,0 +1,110 @@
+<?php
+
+/*
+ * This file is part of the Symfony2 PhoneNumberBundle.
+ *
+ * (c) University of Cambridge
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Misd\PhoneNumberBundle\Tests\Formatter;
+
+use libphonenumber\PhoneNumberFormat;
+use Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter;
+use Misd\PhoneNumberBundle\Templating\Helper\PhoneNumberFormatHelper;
+use Misd\PhoneNumberBundle\Templating\Helper\PhoneNumberHelper;
+use PHPUnit_Framework_TestCase as TestCase;
+
+/**
+ * Phone number formatter test.
+ */
+class PhoneNumberFormatterTest extends TestCase
+{
+    /**
+     * @var \PHPUnit_Framework_MockObject_MockObject|\libphonenumber\PhoneNumberUtil
+     */
+    private $phoneNumberUtil;
+
+    /**
+     * @var \Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter
+     */
+    private $formatter;
+
+    protected function setUp()
+    {
+        $this->phoneNumberUtil = $this->getMockBuilder('libphonenumber\PhoneNumberUtil')
+            ->disableOriginalConstructor()->getMock();
+
+        $this->formatter = new PhoneNumberFormatter($this->phoneNumberUtil);
+    }
+
+    /**
+     * @dataProvider formatProvider
+     */
+    public function testFormat($format, $expectedFormat)
+    {
+        $phoneNumber = $this->getMock('libphonenumber\PhoneNumber');
+
+        $this->phoneNumberUtil->expects($this->once())->method('format')->with($phoneNumber, $expectedFormat);
+
+        $this->formatter->format($phoneNumber, $format);
+    }
+
+    /**
+     * 0 => Format
+     * 1 => Expected format
+     */
+    public function formatProvider()
+    {
+        return array(
+            array(PhoneNumberFormat::NATIONAL, PhoneNumberFormat::NATIONAL),
+            array('NATIONAL', PhoneNumberFormat::NATIONAL),
+        );
+    }
+
+    /**
+     * @expectedException \Misd\PhoneNumberBundle\Exception\InvalidArgumentException
+     */
+    public function testFormatInvalidArgumentException()
+    {
+        $phoneNumber = $this->getMock('libphonenumber\PhoneNumber');
+
+        $this->formatter->format($phoneNumber, 'foo');
+    }
+
+    /**
+     * @dataProvider isTypeProvider
+     */
+    public function testIsType($type, $isNationalFormat)
+    {
+        $phoneNumber = $this->getMock('libphonenumber\PhoneNumber');
+
+        $this->phoneNumberUtil->expects($this->once())->method('getNumberType')->with($phoneNumber)->willReturn(PhoneNumberFormat::NATIONAL);
+
+        $this->assertSame($isNationalFormat, $this->formatter->isType($phoneNumber, $type));
+    }
+
+    /**
+     * 0 => Format
+     * 1 => Expected format
+     */
+    public function isTypeProvider()
+    {
+        return array(
+            array(PhoneNumberFormat::NATIONAL, true),
+            array(PhoneNumberFormat::INTERNATIONAL, false),
+        );
+    }
+
+    /**
+     * @expectedException \Misd\PhoneNumberBundle\Exception\InvalidArgumentException
+     */
+    public function testIsTypeInvalidArgumentException()
+    {
+        $phoneNumber = $this->getMock('libphonenumber\PhoneNumber');
+
+        $this->formatter->isType($phoneNumber, 'foo');
+    }
+}
diff --git a/Tests/Templating/Helper/PhoneNumberHelperTest.php b/Tests/Templating/Helper/PhoneNumberHelperTest.php
index 3dab84b1..35383e79 100644
--- a/Tests/Templating/Helper/PhoneNumberHelperTest.php
+++ b/Tests/Templating/Helper/PhoneNumberHelperTest.php
@@ -21,7 +21,7 @@
  */
 class PhoneNumberHelperTest extends TestCase
 {
-    public function testConstructor()
+    public function testDeprecatedConstructor()
     {
         $phoneNumberUtil = $this->getMockBuilder('libphonenumber\PhoneNumberUtil')
             ->disableOriginalConstructor()->getMock();
@@ -31,6 +31,16 @@ public function testConstructor()
         $this->assertInstanceOf('Symfony\Component\Templating\Helper\HelperInterface', $helper);
     }
 
+    public function testConstructor()
+    {
+        $phoneNumberFormatter = $this->getMockBuilder('Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter')
+            ->disableOriginalConstructor()->getMock();
+
+        $helper = new PhoneNumberHelper($phoneNumberFormatter);
+
+        $this->assertInstanceOf('Symfony\Component\Templating\Helper\HelperInterface', $helper);
+    }
+
     public function testCharset()
     {
         $phoneNumberUtil = $this->getMockBuilder('libphonenumber\PhoneNumberUtil')
@@ -53,47 +63,43 @@ public function testName()
         $this->assertTrue(is_string($helper->getName()));
     }
 
-    /**
-     * @dataProvider processProvider
-     */
-    public function testProcess($format, $expectedFormat)
+    public function testFormat()
     {
         $phoneNumber = $this->getMock('libphonenumber\PhoneNumber');
 
-        $phoneNumberUtil = $this->getMockBuilder('libphonenumber\PhoneNumberUtil')
+        $phoneNumberFormatter = $this->getMockBuilder('Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter')
             ->disableOriginalConstructor()->getMock();
-        $phoneNumberUtil->expects($this->once())->method('format')->with($phoneNumber, $expectedFormat);
-
-        $helper = new PhoneNumberHelper($phoneNumberUtil);
+        $phoneNumberFormatter->expects($this->once())->method('format')->with($phoneNumber, PhoneNumberFormat::NATIONAL);
 
-        $helper->format($phoneNumber, $format);
-    }
+        $helper = new PhoneNumberHelper($phoneNumberFormatter);
 
-    /**
-     * 0 => Format
-     * 1 => Expected format
-     */
-    public function processProvider()
-    {
-        return array(
-            array(PhoneNumberFormat::NATIONAL, PhoneNumberFormat::NATIONAL),
-            array('NATIONAL', PhoneNumberFormat::NATIONAL),
-        );
+        $helper->format($phoneNumber, PhoneNumberFormat::NATIONAL);
     }
 
     /**
-     * @expectedException \Misd\PhoneNumberBundle\Exception\InvalidArgumentException
+     * @dataProvider isTypeProvider
      */
-    public function testProcessInvalidArgumentException()
+    public function testIsType($type, $isNationalType)
     {
         $phoneNumber = $this->getMock('libphonenumber\PhoneNumber');
 
-        $phoneNumberUtil = $this->getMockBuilder('libphonenumber\PhoneNumberUtil')
+        $phoneNumberFormatter = $this->getMockBuilder('Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter')
             ->disableOriginalConstructor()->getMock();
+        $phoneNumberFormatter->expects($this->once())->method('getNumberType')->with($phoneNumber)->willReturn(PhoneNumberFormat::NATIONAL);
 
-        $helper = new PhoneNumberHelper($phoneNumberUtil);
+        $helper = new PhoneNumberHelper($phoneNumberFormatter);
+
+        $result = $helper->isType($phoneNumber, $type);
+
+        $this->assertSame($isNationalType, $result);
+    }
 
-        $helper->format($phoneNumber, 'foo');
+    public function isTypeProvider()
+    {
+        return array(
+            array(PhoneNumberFormat::INTERNATIONAL, false),
+            array(PhoneNumberFormat::NATIONAL, true),
+        );
     }
 
     public function testDeprecatedClassName() {
diff --git a/Tests/Twig/Extension/PhoneNumberHelperExtensionTest.php b/Tests/Twig/Extension/PhoneNumberHelperExtensionTest.php
index a6e0daf2..90857f71 100644
--- a/Tests/Twig/Extension/PhoneNumberHelperExtensionTest.php
+++ b/Tests/Twig/Extension/PhoneNumberHelperExtensionTest.php
@@ -21,9 +21,9 @@
 class PhoneNumberHelperExtensionTest extends \PHPUnit_Framework_TestCase
 {
     /**
-     * @var \PHPUnit_Framework_MockObject_MockObject|\Misd\PhoneNumberBundle\Templating\Helper\PhoneNumberHelper
+     * @var \PHPUnit_Framework_MockObject_MockObject|\Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter
      */
-    private $helper;
+    private $formatter;
 
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject|\Misd\PhoneNumberBundle\Twig\Extension\PhoneNumberHelperExtension
@@ -32,11 +32,22 @@ class PhoneNumberHelperExtensionTest extends \PHPUnit_Framework_TestCase
 
     protected function setUp()
     {
-        $this->helper = $this->getMockBuilder('Misd\PhoneNumberBundle\Templating\Helper\PhoneNumberHelper')
+        $this->formatter = $this->getMockBuilder('Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter')
             ->disableOriginalConstructor()
             ->getMock();
 
-        $this->extension = new PhoneNumberHelperExtension($this->helper);
+        $this->extension = new PhoneNumberHelperExtension($this->formatter);
+    }
+
+    public function testDeprecatedConstructor()
+    {
+        $helper = $this->getMockBuilder('Misd\PhoneNumberBundle\Templating\Helper\PhoneNumberHelper')
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $extension = new PhoneNumberHelperExtension($helper);
+
+        $this->assertInstanceOf('Twig_Extension', $extension);
     }
 
     public function testConstructor()
@@ -54,7 +65,7 @@ public function testGetFunctions()
 
         $callable = $functions[0]->getCallable();
 
-        $this->assertSame($this->helper, $callable[0]);
+        $this->assertSame($this->formatter, $callable[0]);
         $this->assertSame('format', $callable[1]);
 
         $this->assertInstanceOf('Twig_SimpleFunction', $functions[1]);
@@ -62,7 +73,7 @@ public function testGetFunctions()
 
         $callable = $functions[1]->getCallable();
 
-        $this->assertSame($this->helper, $callable[0]);
+        $this->assertSame($this->formatter, $callable[0]);
         $this->assertSame('isType', $callable[1]);
     }
 
@@ -76,7 +87,7 @@ public function testGetFilters()
 
         $callable = $filters[0]->getCallable();
 
-        $this->assertSame($this->helper, $callable[0]);
+        $this->assertSame($this->formatter, $callable[0]);
         $this->assertSame('format', $callable[1]);
     }
 
@@ -90,7 +101,7 @@ public function testGetTests()
 
         $callable = $tests[0]->getCallable();
 
-        $this->assertSame($this->helper, $callable[0]);
+        $this->assertSame($this->formatter, $callable[0]);
         $this->assertSame('isType', $callable[1]);
     }
 
diff --git a/Twig/Extension/PhoneNumberHelperExtension.php b/Twig/Extension/PhoneNumberHelperExtension.php
index fdccc101..a018e5f3 100644
--- a/Twig/Extension/PhoneNumberHelperExtension.php
+++ b/Twig/Extension/PhoneNumberHelperExtension.php
@@ -11,6 +11,7 @@
 
 namespace Misd\PhoneNumberBundle\Twig\Extension;
 
+use Misd\PhoneNumberBundle\Formatter\PhoneNumberFormatter;
 use Misd\PhoneNumberBundle\Templating\Helper\PhoneNumberHelper;
 
 /**
@@ -19,20 +20,23 @@
 class PhoneNumberHelperExtension extends \Twig_Extension
 {
     /**
-     * Phone number helper.
+     * Phone number formatter.
      *
-     * @var PhoneNumberHelper
+     * @var PhoneNumberFormatter
      */
-    protected $helper;
+    protected $formatter;
 
     /**
      * Constructor.
      *
-     * @param PhoneNumberHelper $helper Phone number helper.
+     * @param PhoneNumberFormatter $formatter Phone number formatter.
      */
-    public function __construct(PhoneNumberHelper $helper)
+    public function __construct($formatter)
     {
-        $this->helper = $helper;
+        if ($formatter instanceof PhoneNumberHelper) {
+            // throw deprecation message
+        }
+        $this->formatter = $formatter;
     }
 
     /**
@@ -41,8 +45,8 @@ public function __construct(PhoneNumberHelper $helper)
     public function getFunctions()
     {
         return array(
-            new \Twig_SimpleFunction('phone_number_format', array($this->helper, 'format'), array('deprecated' => '1.2')),
-            new \Twig_SimpleFunction('phone_number_is_type', array($this->helper, 'isType'), array('deprecated' => '1.2')),
+            new \Twig_SimpleFunction('phone_number_format', array($this->formatter, 'format'), array('deprecated' => '1.2')),
+            new \Twig_SimpleFunction('phone_number_is_type', array($this->formatter, 'isType'), array('deprecated' => '1.2')),
         );
     }
 
@@ -52,7 +56,7 @@ public function getFunctions()
     public function getFilters()
     {
         return array(
-            new \Twig_SimpleFilter('phone_number_format', array($this->helper, 'format')),
+            new \Twig_SimpleFilter('phone_number_format', array($this->formatter, 'format')),
         );
     }
 
@@ -62,7 +66,7 @@ public function getFilters()
     public function getTests()
     {
         return array(
-            new \Twig_SimpleTest('phone_number_of_type', array($this->helper, 'isType')),
+            new \Twig_SimpleTest('phone_number_of_type', array($this->formatter, 'isType')),
         );
     }