diff --git a/src/Jasny/Twig/DateExtension.php b/src/Jasny/Twig/DateExtension.php
index a660df8..7650117 100644
--- a/src/Jasny/Twig/DateExtension.php
+++ b/src/Jasny/Twig/DateExtension.php
@@ -75,7 +75,7 @@ protected function getFormat($format, $calendar=\IntlDateFormatter::GREGORIAN)
      */
     protected function getDefaultDatePattern($calendar=\IntlDateFormatter::GREGORIAN)
     {
-        return preg_replace('/\byy?\b/', 'yyyy', \IntlDateFormatter::create(\Locale::getDefault(), \IntlDateFormatter::SHORT, \IntlDateFormatter::NONE, null, $calendar)->getPattern());
+        return preg_replace('/\byy?\b/', 'yyyy', \IntlDateFormatter::create(\Locale::getDefault(), \IntlDateFormatter::SHORT, \IntlDateFormatter::NONE, \IntlTimeZone::getGMT(), $calendar)->getPattern());
     }
 
     /**
@@ -97,7 +97,7 @@ public function localDate($date, $format=null, $calendar='gregorian')
         $calendar = $calendar == 'traditional' ? \IntlDateFormatter::TRADITIONAL : \IntlDateFormatter::GREGORIAN;
         list($format, $pattern) = $this->getFormat($format, $calendar);
         
-        $df = new \IntlDateFormatter(\Locale::getDefault(), $format, \IntlDateFormatter::NONE, null, $calendar, $pattern);
+        $df = new \IntlDateFormatter(\Locale::getDefault(), $format, \IntlDateFormatter::NONE, \IntlTimeZone::getGMT(), $calendar, $pattern);
         return $df->format($date->getTimestamp());
     }
 
@@ -120,7 +120,7 @@ public function localTime($date, $format='short', $calendar='gregorian')
         $calendar = $calendar == 'traditional' ? \IntlDateFormatter::TRADITIONAL : \IntlDateFormatter::GREGORIAN;
         list($format, $pattern) = $this->getFormat($format, $calendar);
         
-        $df = new \IntlDateFormatter(\Locale::getDefault(), \IntlDateFormatter::NONE, $format, null, $calendar, $pattern);
+        $df = new \IntlDateFormatter(\Locale::getDefault(), \IntlDateFormatter::NONE, $format, \IntlTimeZone::getGMT(), $calendar, $pattern);
         return $df->format($date->getTimestamp());
     }
 
@@ -152,7 +152,7 @@ public function localDateTime($date, $format=null, $calendar='gregorian')
         
         list($format, $pattern) = $this->getFormat($format, $calendar);
         
-        $df = new \IntlDateFormatter(\Locale::getDefault(), $format, \IntlDateFormatter::SHORT, null, $calendar, $pattern);
+        $df = new \IntlDateFormatter(\Locale::getDefault(), $format, \IntlDateFormatter::SHORT, \IntlTimeZone::getGMT(), $calendar, $pattern);
         return $df->format($date->getTimestamp());
     }
     
diff --git a/tests/Jasny/Twig/ArrayExtensionTest.php b/tests/Jasny/Twig/ArrayExtensionTest.php
index b180ee1..f52391a 100644
--- a/tests/Jasny/Twig/ArrayExtensionTest.php
+++ b/tests/Jasny/Twig/ArrayExtensionTest.php
@@ -2,15 +2,14 @@
 
 namespace Jasny\Twig;
 
-use Jasny\Twig\ArrayExtension;
 
-class ArrayExtensionTest extends PHPUnit_Framework_TestCase {
+class ArrayExtensionTest extends \PHPUnit_Framework_TestCase  {
 
     private function buildEnv($template) {
-        $loader = new Twig_Loader_Array(array(
+        $loader = new \Twig_Loader_Array(array(
             'template' => $template,
         ));
-        $twig = new Twig_Environment($loader);
+        $twig = new \Twig_Environment($loader);
         $twig->addExtension(new ArrayExtension());
         return $twig;
     }
diff --git a/tests/Jasny/Twig/DateExtensionTest.php b/tests/Jasny/Twig/DateExtensionTest.php
index 37890e4..69cbbde 100644
--- a/tests/Jasny/Twig/DateExtensionTest.php
+++ b/tests/Jasny/Twig/DateExtensionTest.php
@@ -2,20 +2,19 @@
 
 namespace Jasny\Twig;
 
-use Jasny\Twig\DateExtension;
 
-class DateExtensionTest extends PHPUnit_Framework_TestCase {
+class DateExtensionTest extends \PHPUnit_Framework_TestCase  {
 
     public static function setUpBeforeClass() {
         parent::setUpBeforeClass();
-        Locale::setDefault("en_CA");
+        \Locale::setDefault("en_EN");
     }
     
     private function buildEnv($template) {
-        $loader = new Twig_Loader_Array(array(
+        $loader = new \Twig_Loader_Array(array(
             'template' => $template,
         ));
-        $twig = new Twig_Environment($loader);
+        $twig = new \Twig_Environment($loader);
         $twig->addExtension(new DateExtension());
         return $twig;
     }
@@ -48,7 +47,7 @@ public function testLocalTime() {
     }
 
     public function testLocalTimeLong() {
-        $this->check('11:14:12 PM PDT', "{{ '23:14:12'|localtime('long') }}");
+        $this->check('11:14:12 PM GMT', "{{ '23:14:12'|localtime('long') }}");
     }
 
     public function testLocalTimeShort() {
diff --git a/tests/Jasny/Twig/PcreExtensionTest.php b/tests/Jasny/Twig/PcreExtensionTest.php
index 9a2e08e..a636e07 100644
--- a/tests/Jasny/Twig/PcreExtensionTest.php
+++ b/tests/Jasny/Twig/PcreExtensionTest.php
@@ -2,15 +2,14 @@
 
 namespace Jasny\Twig;
 
-use Jasny\Twig\PcreExtension;
 
-class PcreExtensionTest extends PHPUnit_Framework_TestCase {
+class PcreExtensionTest extends \PHPUnit_Framework_TestCase  {
 
     private function buildEnv($template) {
-        $loader = new Twig_Loader_Array(array(
+        $loader = new \Twig_Loader_Array(array(
             'template' => $template,
         ));
-        $twig = new Twig_Environment($loader);
+        $twig = new \Twig_Environment($loader);
         $twig->addExtension(new PcreExtension());
         return $twig;
     }
@@ -43,7 +42,7 @@ public function testPregMatchNo() {
     }
 
     /**
-     * @expectedException Twig_Error_Runtime
+     * @expectedException \Twig_Error_Runtime
      */
     public function testPregMatchError() {
         $this->check('NO', '{% if "fod"|preg_match("/o//o/") %}YES{% else %}NO{% endif %}');
diff --git a/tests/Jasny/Twig/TextExtensionTest.php b/tests/Jasny/Twig/TextExtensionTest.php
index 84f7df8..b478349 100644
--- a/tests/Jasny/Twig/TextExtensionTest.php
+++ b/tests/Jasny/Twig/TextExtensionTest.php
@@ -2,15 +2,14 @@
 
 namespace Jasny\Twig;
 
-use Jasny\Twig\TextExtension;
 
-class TextExtensionTest extends PHPUnit_Framework_TestCase {
+class TextExtensionTest extends \PHPUnit_Framework_TestCase  {
 
     private function buildEnv($template) {
-        $loader = new Twig_Loader_Array(array(
+        $loader = new \Twig_Loader_Array(array(
             'template' => $template,
         ));
-        $twig = new Twig_Environment($loader);
+        $twig = new \Twig_Environment($loader);
         $twig->addExtension(new TextExtension());
         return $twig;
     }