diff --git a/.travis.yml b/.travis.yml
index 825aa21..37e59b6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,9 +3,8 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
 before_script:
-  - "mkdir -p ~/.composer"
-  - cp src/test/resources/travis-composer-config.json ~/.composer/config.json
   - wget https://raw.github.com/ehough/throwback/develop/src/main/bash/travis-setup.sh
   - chmod a+x travis-setup.sh
   - ./travis-setup.sh
diff --git a/src/main/php/ehough/pulsar/ApcClassLoader.php b/src/main/php/ehough/pulsar/ApcClassLoader.php
index c84b9a6..078b87d 100644
--- a/src/main/php/ehough/pulsar/ApcClassLoader.php
+++ b/src/main/php/ehough/pulsar/ApcClassLoader.php
@@ -77,7 +77,7 @@ public function __construct($prefix, $decorated)
     /**
      * Registers this instance as an autoloader.
      *
-     * @param Boolean $prepend Whether to prepend the autoloader or not
+     * @param bool    $prepend Whether to prepend the autoloader or not
      */
     public function register($prepend = false)
     {
@@ -106,7 +106,7 @@ public function unregister()
      *
      * @param string $class The name of the class
      *
-     * @return Boolean|null True, if loaded
+     * @return bool|null    True, if loaded
      */
     public function loadClass($class)
     {
diff --git a/src/main/php/ehough/pulsar/ClassCollectionLoader.php b/src/main/php/ehough/pulsar/ClassCollectionLoader.php
index 4d41876..5130969 100644
--- a/src/main/php/ehough/pulsar/ClassCollectionLoader.php
+++ b/src/main/php/ehough/pulsar/ClassCollectionLoader.php
@@ -26,8 +26,8 @@ class ehough_pulsar_ClassCollectionLoader
      * @param array   $classes    An array of classes to load
      * @param string  $cacheDir   A cache directory
      * @param string  $name       The cache name prefix
-     * @param Boolean $autoReload Whether to flush the cache when the cache is stale or not
-     * @param Boolean $adaptive   Whether to remove already declared classes or not
+     * @param bool    $autoReload Whether to flush the cache when the cache is stale or not
+     * @param bool    $adaptive   Whether to remove already declared classes or not
      * @param string  $extension  File extension of the resulting file
      *
      * @throws InvalidArgumentException When class can't be loaded
@@ -198,7 +198,7 @@ public static function fixNamespaceDeclarations($source)
      */
     public static function enableTokenizer($bool)
     {
-        self::$useTokenizer = (Boolean) $bool;
+        self::$useTokenizer = (bool) $bool;
     }
 
     /**
diff --git a/src/main/php/ehough/pulsar/ClassLoader.php b/src/main/php/ehough/pulsar/ClassLoader.php
index 5b9d5e6..097c2fd 100644
--- a/src/main/php/ehough/pulsar/ClassLoader.php
+++ b/src/main/php/ehough/pulsar/ClassLoader.php
@@ -101,7 +101,7 @@ public function addPrefix($prefix, $paths)
     /**
      * Turns on searching the include for class files.
      *
-     * @param Boolean $useIncludePath
+     * @param bool    $useIncludePath
      */
     public function setUseIncludePath($useIncludePath)
     {
@@ -112,7 +112,7 @@ public function setUseIncludePath($useIncludePath)
      * Can be used to check if the autoloader uses the include path to check
      * for classes.
      *
-     * @return Boolean
+     * @return bool
      */
     public function getUseIncludePath()
     {
@@ -122,7 +122,7 @@ public function getUseIncludePath()
     /**
      * Registers this instance as an autoloader.
      *
-     * @param Boolean $prepend Whether to prepend the autoloader or not
+     * @param bool    $prepend Whether to prepend the autoloader or not
      */
     public function register($prepend = false)
     {
@@ -142,7 +142,7 @@ public function unregister()
      *
      * @param string $class The name of the class
      *
-     * @return Boolean|null True, if loaded
+     * @return bool|null    True, if loaded
      */
     public function loadClass($class)
     {
diff --git a/src/main/php/ehough/pulsar/DebugClassLoader.php b/src/main/php/ehough/pulsar/DebugClassLoader.php
index 50c0607..08fd90e 100644
--- a/src/main/php/ehough/pulsar/DebugClassLoader.php
+++ b/src/main/php/ehough/pulsar/DebugClassLoader.php
@@ -96,7 +96,7 @@ public function findFile($class)
      *
      * @param string $class The name of the class
      *
-     * @return Boolean|null True, if loaded
+     * @return bool|null    True, if loaded
      *
      * @throws \RuntimeException
      */
diff --git a/src/main/php/ehough/pulsar/DebugUniversalClassLoader.php b/src/main/php/ehough/pulsar/DebugUniversalClassLoader.php
index 2248e9d..06ac73c 100644
--- a/src/main/php/ehough/pulsar/DebugUniversalClassLoader.php
+++ b/src/main/php/ehough/pulsar/DebugUniversalClassLoader.php
@@ -46,7 +46,7 @@ public static function enable()
     }
 
     /**
-     * {@inheritDoc}
+     * {@inheritdoc}
      */
     public function loadClass($class)
     {
diff --git a/src/main/php/ehough/pulsar/MapClassLoader.php b/src/main/php/ehough/pulsar/MapClassLoader.php
index e4effa7..ed4078e 100644
--- a/src/main/php/ehough/pulsar/MapClassLoader.php
+++ b/src/main/php/ehough/pulsar/MapClassLoader.php
@@ -31,7 +31,7 @@ public function __construct(array $map)
     /**
      * Registers this instance as an autoloader.
      *
-     * @param Boolean $prepend Whether to prepend the autoloader or not
+     * @param bool    $prepend Whether to prepend the autoloader or not
      */
     public function register($prepend = false)
     {
diff --git a/src/main/php/ehough/pulsar/Psr4ClassLoader.php b/src/main/php/ehough/pulsar/Psr4ClassLoader.php
index f230bd5..3b2470b 100644
--- a/src/main/php/ehough/pulsar/Psr4ClassLoader.php
+++ b/src/main/php/ehough/pulsar/Psr4ClassLoader.php
@@ -58,7 +58,7 @@ public function findFile($class)
     /**
      * @param string $class
      *
-     * @return Boolean
+     * @return bool
      */
     public function loadClass($class)
     {
@@ -75,7 +75,7 @@ public function loadClass($class)
     /**
      * Registers this instance as an autoloader.
      *
-     * @param Boolean $prepend
+     * @param bool    $prepend
      */
     public function register($prepend = false)
     {
diff --git a/src/main/php/ehough/pulsar/UniversalClassLoader.php b/src/main/php/ehough/pulsar/UniversalClassLoader.php
index 02932d8..fa1bf05 100644
--- a/src/main/php/ehough/pulsar/UniversalClassLoader.php
+++ b/src/main/php/ehough/pulsar/UniversalClassLoader.php
@@ -68,7 +68,7 @@ class ehough_pulsar_UniversalClassLoader
      * Turns on searching the include for class files. Allows easy loading
      * of installed PEAR packages
      *
-     * @param Boolean $useIncludePath
+     * @param bool    $useIncludePath
      */
     public function useIncludePath($useIncludePath)
     {
@@ -79,7 +79,7 @@ public function useIncludePath($useIncludePath)
      * Can be used to check if the autoloader uses the include path to check
      * for classes.
      *
-     * @return Boolean
+     * @return bool
      */
     public function getUseIncludePath()
     {
@@ -227,7 +227,7 @@ public function registerPrefix($prefix, $paths)
     /**
      * Registers this instance as an autoloader.
      *
-     * @param Boolean $prepend Whether to prepend the autoloader or not
+     * @param bool    $prepend Whether to prepend the autoloader or not
      *
      * @api
      */
@@ -250,7 +250,7 @@ public function register($prepend = false)
      *
      * @param string $class The name of the class
      *
-     * @return Boolean|null True, if loaded
+     * @return bool|null    True, if loaded
      */
     public function loadClass($class)
     {
diff --git a/src/main/php/ehough/pulsar/WinCacheClassLoader.php b/src/main/php/ehough/pulsar/WinCacheClassLoader.php
index 6ce4378..cff466f 100644
--- a/src/main/php/ehough/pulsar/WinCacheClassLoader.php
+++ b/src/main/php/ehough/pulsar/WinCacheClassLoader.php
@@ -74,7 +74,7 @@ public function __construct($prefix, $decorated)
     /**
      * Registers this instance as an autoloader.
      *
-     * @param Boolean $prepend Whether to prepend the autoloader or not
+     * @param bool    $prepend Whether to prepend the autoloader or not
      */
     public function register($prepend = false)
     {
@@ -94,7 +94,7 @@ public function unregister()
      *
      * @param string $class The name of the class
      *
-     * @return Boolean|null True, if loaded
+     * @return bool|null    True, if loaded
      */
     public function loadClass($class)
     {
diff --git a/src/main/php/ehough/pulsar/XcacheClassLoader.php b/src/main/php/ehough/pulsar/XcacheClassLoader.php
index 7026af5..96b5a63 100644
--- a/src/main/php/ehough/pulsar/XcacheClassLoader.php
+++ b/src/main/php/ehough/pulsar/XcacheClassLoader.php
@@ -71,7 +71,7 @@ public function __construct($prefix, $classFinder)
     /**
      * Registers this instance as an autoloader.
      *
-     * @param Boolean $prepend Whether to prepend the autoloader or not
+     * @param bool    $prepend Whether to prepend the autoloader or not
      */
     public function register($prepend = false)
     {
@@ -100,7 +100,7 @@ public function unregister()
      *
      * @param string $class The name of the class
      *
-     * @return Boolean|null True, if loaded
+     * @return bool|null    True, if loaded
      */
     public function loadClass($class)
     {
diff --git a/src/test/php/ehough/pulsar/ClassCollectionLoaderTest.php b/src/test/php/ehough/pulsar/ClassCollectionLoaderTest.php
index 9d54e03..0f8a419 100644
--- a/src/test/php/ehough/pulsar/ClassCollectionLoaderTest.php
+++ b/src/test/php/ehough/pulsar/ClassCollectionLoaderTest.php
@@ -9,13 +9,24 @@
  * file that was distributed with this source code.
  */
 
-require_once dirname(__FILE__).'/../../../resources/Fixtures/ClassesWithParents/GInterface.php';
-require_once dirname(__FILE__).'/../../../resources/Fixtures/ClassesWithParents/CInterface.php';
-require_once dirname(__FILE__).'/../../../resources/Fixtures/ClassesWithParents/B.php';
-require_once dirname(__FILE__).'/../../../resources/Fixtures/ClassesWithParents/A.php';
+if (version_compare(phpversion(), '5.3') >= 0) {
+    require_once dirname(__FILE__).'/../../../resources/Fixtures/ClassesWithParents/GInterface.php';
+    require_once dirname(__FILE__).'/../../../resources/Fixtures/ClassesWithParents/CInterface.php';
+    require_once dirname(__FILE__).'/../../../resources/Fixtures/ClassesWithParents/B.php';
+    require_once dirname(__FILE__).'/../../../resources/Fixtures/ClassesWithParents/A.php';
+}
 
 class ehough_pulsar_ClassCollectionLoaderTest extends PHPUnit_Framework_TestCase
 {
+    public function setup()
+    {
+        if (version_compare(phpversion(), '5.3', '<')) {
+            $this->markTestSkipped('Requires PHP > 5.3');
+
+            return;
+        }
+    }
+
     public function testTraitDependencies()
     {
         if (version_compare(phpversion(), '5.4', '<')) {
@@ -26,7 +37,7 @@ public function testTraitDependencies()
 
         require_once dirname(__FILE__).'/../../../resources/Fixtures/deps/traits.php';
 
-        $r = new \ReflectionClass('ehough_pulsar_ClassCollectionLoader');
+        $r = new ReflectionClass('ehough_pulsar_ClassCollectionLoader');
         $m = $r->getMethod('getOrderedClasses');
         $m->setAccessible(true);
 
@@ -34,14 +45,14 @@ public function testTraitDependencies()
 
         $this->assertEquals(
             array('TD', 'TC', 'TB', 'TA', 'TZ', 'CTFoo'),
-            array_map(function ($class) { return $class->getName(); }, $ordered)
+            array_map(array($this, '__callbackGetClassName'), $ordered)
         );
 
         $ordered = $m->invoke('ehough_pulsar_ClassCollectionLoader', array('CTBar'));
 
         $this->assertEquals(
             array('TD', 'TZ', 'TC', 'TB', 'TA', 'CTBar'),
-            array_map(function ($class) { return $class->getName(); }, $ordered)
+            array_map(array($this, '__callbackGetClassName'), $ordered)
         );
     }
 
@@ -50,6 +61,12 @@ public function testTraitDependencies()
      */
     public function testClassReordering(array $classes)
     {
+        if (version_compare(phpversion(), '5.3', '<')) {
+            $this->markTestSkipped('Requires PHP > 5.3');
+
+            return;
+        }
+
         $expected = array(
             'ClassesWithParents\\GInterface',
             'ClassesWithParents\\CInterface',
@@ -57,13 +74,18 @@ public function testClassReordering(array $classes)
             'ClassesWithParents\\A',
         );
 
-        $r = new \ReflectionClass('ehough_pulsar_ClassCollectionLoader');
+        $r = new ReflectionClass('ehough_pulsar_ClassCollectionLoader');
         $m = $r->getMethod('getOrderedClasses');
         $m->setAccessible(true);
 
         $ordered = $m->invoke('ehough_pulsar_ClassCollectionLoader', $classes);
 
-        $this->assertEquals($expected, array_map(function ($class) { return $class->getName(); }, $ordered));
+        $this->assertEquals($expected, array_map(array($this, '__callbackGetClassName'), $ordered));
+    }
+
+    public function __callbackGetClassName($class)
+    {
+        return $class->getName();
     }
 
     public function getDifferentOrders()
@@ -120,13 +142,13 @@ public function testClassWithTraitsReordering(array $classes)
             'ClassesWithParents\\E',
         );
 
-        $r = new \ReflectionClass('ehough_pulsar_ClassCollectionLoader');
+        $r = new ReflectionClass('ehough_pulsar_ClassCollectionLoader');
         $m = $r->getMethod('getOrderedClasses');
         $m->setAccessible(true);
 
         $ordered = $m->invoke('ehough_pulsar_ClassCollectionLoader', $classes);
 
-        $this->assertEquals($expected, array_map(function ($class) { return $class->getName(); }, $ordered));
+        $this->assertEquals($expected, array_map(array($this, '__callbackGetClassName'), $ordered));
     }
 
     public function getDifferentOrdersForTraits()
@@ -201,11 +223,7 @@ public function testCommentStripping()
         if (is_file($file = sys_get_temp_dir().'/bar.php')) {
             unlink($file);
         }
-        spl_autoload_register($r = function ($class) {
-            if (0 === strpos($class, 'Namespaced') || 0 === strpos($class, 'Pearlike_')) {
-                require_once dirname(__FILE__).'/../../../resources/Fixtures/'.str_replace(array('\\', '_'), '/', $class).'.php';
-            }
-        });
+        spl_autoload_register($r = array($this, '__callback_testCommentStripping'));
 
         ehough_pulsar_ClassCollectionLoader::load(
             array('Namespaced\\WithComments', 'Pearlike_WithComments'),
@@ -253,4 +271,11 @@ class Pearlike_WithComments
 
         unlink($file);
     }
+
+    public function __callback_testCommentStripping($class)
+    {
+        if (0 === strpos($class, 'Namespaced') || 0 === strpos($class, 'Pearlike_')) {
+            require_once dirname(__FILE__).'/../../../resources/Fixtures/'.str_replace(array('\\', '_'), '/', $class).'.php';
+        }
+    }
 }
diff --git a/src/test/php/ehough/pulsar/ClassMapGeneratorTest.php b/src/test/php/ehough/pulsar/ClassMapGeneratorTest.php
index 7103853..4d405e3 100644
--- a/src/test/php/ehough/pulsar/ClassMapGeneratorTest.php
+++ b/src/test/php/ehough/pulsar/ClassMapGeneratorTest.php
@@ -16,6 +16,14 @@ class ehough_pulsar_ClassMapGeneratorTest extends PHPUnit_Framework_TestCase
      */
     private $workspace = null;
 
+    public function setup()
+    {
+        if (version_compare(PHP_VERSION, '5.3') < 0) {
+
+            $this->markTestSkipped('PHP 5.2');
+        }
+    }
+
     public function prepare_workspace()
     {
         $this->workspace = rtrim(sys_get_temp_dir(), DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR.time().rand(0, 1000);
@@ -29,7 +37,7 @@ public function prepare_workspace()
     private function clean($file)
     {
         if (is_dir($file) && !is_link($file)) {
-            $dir = new \FilesystemIterator($file);
+            $dir = new FilesystemIterator($file);
             foreach ($dir as $childFile) {
                 $this->clean($childFile);
             }
@@ -120,7 +128,8 @@ public function testCreateMapFinderSupport()
             $this->markTestSkipped('Finder component is not available');
         }
 
-        $finder = new \Symfony\Component\Finder\Finder();
+        $ref = new ReflectionClass('Symfony\\Component\\Finder\\Finder');
+        $finder = $ref->newInstance();
         $finder->files()->in(dirname(__FILE__) . '/../../../resources/Fixtures/beta/NamespaceCollision');
 
         $this->assertEqualsNormalized(array(
diff --git a/src/test/resources/travis-composer-config.json b/src/test/resources/travis-composer-config.json
deleted file mode 100644
index 135617e..0000000
--- a/src/test/resources/travis-composer-config.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-    "config": {
-        "github-oauth": {
-            "github.com" : "636a870289082d5f5d70d7ebce004d70cce3a278"
-        }
-    }
-}
\ No newline at end of file