diff --git a/src/PhpSpreadsheet/Cell/DefaultValueBinder.php b/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
index 3ad0541f..d4cbaa00 100644
--- a/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
+++ b/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
@@ -43,7 +43,7 @@ class DefaultValueBinder implements IValueBinder
             $value = \PHPExcel\Shared\String::SanitizeUTF8($value);
         } elseif (is_object($value)) {
             // Handle any objects that might be injected
-            if ($value instanceof DateTime) {
+            if ($value instanceof \DateTime) {
                 $value = $value->format('Y-m-d H:i:s');
             } elseif (!($value instanceof \PHPExcel\RichText)) {
                 $value = (string) $value;
diff --git a/src/PhpSpreadsheet/RichText.php b/src/PhpSpreadsheet/RichText.php
index bdccdd27..88e55a73 100644
--- a/src/PhpSpreadsheet/RichText.php
+++ b/src/PhpSpreadsheet/RichText.php
@@ -27,22 +27,22 @@ namespace PHPExcel;
  * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
  * @version    ##VERSION##, ##DATE##
  */
-class RichText implements PHPExcel_IComparable
+class RichText implements IComparable
 {
     /**
      * Rich text elements
      *
-     * @var PHPExcel_RichText_ITextElement[]
+     * @var RichText\ITextElement[]
      */
     private $richTextElements;
 
     /**
-     * Create a new PHPExcel_RichText instance
+     * Create a new RichText instance
      *
-     * @param PHPExcel_Cell $pCell
-     * @throws PHPExcel_Exception
+     * @param Cell $pCell
+     * @throws Exception
      */
-    public function __construct(PHPExcel_Cell $pCell = null)
+    public function __construct(Cell $pCell = null)
     {
         // Initialise variables
         $this->richTextElements = array();
@@ -51,24 +51,24 @@ class RichText implements PHPExcel_IComparable
         if ($pCell !== null) {
             // Add cell text and style
             if ($pCell->getValue() != "") {
-                $objRun = new PHPExcel_RichText_Run($pCell->getValue());
+                $objRun = new RichText\Run($pCell->getValue());
                 $objRun->setFont(clone $pCell->getParent()->getStyle($pCell->getCoordinate())->getFont());
                 $this->addText($objRun);
             }
 
             // Set parent value
-            $pCell->setValueExplicit($this, PHPExcel_Cell_DataType::TYPE_STRING);
+            $pCell->setValueExplicit($this, Cell\DataType::TYPE_STRING);
         }
     }
 
     /**
      * Add text
      *
-     * @param PHPExcel_RichText_ITextElement $pText Rich text element
-     * @throws PHPExcel_Exception
-     * @return PHPExcel_RichText
+     * @param RichText\ITextElement $pText Rich text element
+     * @throws Exception
+     * @return RichText
      */
-    public function addText(PHPExcel_RichText_ITextElement $pText = null)
+    public function addText(RichText\ITextElement $pText = null)
     {
         $this->richTextElements[] = $pText;
         return $this;
@@ -78,12 +78,12 @@ class RichText implements PHPExcel_IComparable
      * Create text
      *
      * @param string $pText Text
-     * @return PHPExcel_RichText_TextElement
-     * @throws PHPExcel_Exception
+     * @return RichText\TextElement
+     * @throws Exception
      */
     public function createText($pText = '')
     {
-        $objText = new PHPExcel_RichText_TextElement($pText);
+        $objText = new RichText\TextElement($pText);
         $this->addText($objText);
         return $objText;
     }
@@ -92,12 +92,12 @@ class RichText implements PHPExcel_IComparable
      * Create text run
      *
      * @param string $pText Text
-     * @return PHPExcel_RichText_Run
-     * @throws PHPExcel_Exception
+     * @return RichText\Run
+     * @throws Exception
      */
     public function createTextRun($pText = '')
     {
-        $objText = new PHPExcel_RichText_Run($pText);
+        $objText = new RichText\Run($pText);
         $this->addText($objText);
         return $objText;
     }
@@ -112,12 +112,11 @@ class RichText implements PHPExcel_IComparable
         // Return value
         $returnValue = '';
 
-        // Loop through all PHPExcel_RichText_ITextElement
+        // Loop through all RichText\ITextElements
         foreach ($this->richTextElements as $text) {
             $returnValue .= $text->getText();
         }
 
-        // Return
         return $returnValue;
     }
 
@@ -134,7 +133,7 @@ class RichText implements PHPExcel_IComparable
     /**
      * Get Rich Text elements
      *
-     * @return PHPExcel_RichText_ITextElement[]
+     * @return RichText\ITextElement[]
      */
     public function getRichTextElements()
     {
@@ -144,16 +143,16 @@ class RichText implements PHPExcel_IComparable
     /**
      * Set Rich Text elements
      *
-     * @param PHPExcel_RichText_ITextElement[] $pElements Array of elements
-     * @throws PHPExcel_Exception
-     * @return PHPExcel_RichText
+     * @param RichText\ITextElement[] $pElements Array of elements
+     * @throws Exception
+     * @return RichText
      */
     public function setRichTextElements($pElements = null)
     {
         if (is_array($pElements)) {
             $this->richTextElements = $pElements;
         } else {
-            throw new PHPExcel_Exception("Invalid PHPExcel_RichText_ITextElement[] array passed.");
+            throw new Exception("Invalid \PHPExcel\RichText\ITextElement[] array passed.");
         }
         return $this;
     }
diff --git a/unitTests/Classes/src/Cell/DataTypeTest.php b/unitTests/Classes/src/Cell/DataTypeTest.php
index 1180c9d6..019a8d49 100644
--- a/unitTests/Classes/src/Cell/DataTypeTest.php
+++ b/unitTests/Classes/src/Cell/DataTypeTest.php
@@ -9,12 +9,12 @@ class DataTypeTest extends PHPUnit_Framework_TestCase
         if (!defined('PHPEXCEL_ROOT')) {
             define('PHPEXCEL_ROOT', APPLICATION_PATH . '/');
         }
-        require_once(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
+        require_once(PHPEXCEL_ROOT . '/Bootstrap.php');
     }
 
     public function testGetErrorCodes()
     {
-        $result = call_user_func(array('PHPExcel_Cell_DataType','getErrorCodes'));
+        $result = call_user_func(array('\\PHPExcel\\Cell\\DataType','getErrorCodes'));
         $this->assertInternalType('array', $result);
         $this->assertGreaterThan(0, count($result));
         $this->assertArrayHasKey('#NULL!', $result);
diff --git a/unitTests/Classes/src/Cell/DefaultValueBinderTest.php b/unitTests/Classes/src/Cell/DefaultValueBinderTest.php
index 37287b1f..4405f335 100644
--- a/unitTests/Classes/src/Cell/DefaultValueBinderTest.php
+++ b/unitTests/Classes/src/Cell/DefaultValueBinderTest.php
@@ -1,6 +1,7 @@
 <?php
 
 require_once 'testDataFileIterator.php';
+require_once 'testDataFileIteratorJson.php';
 
 class DefaultValueBinderTest extends PHPUnit_Framework_TestCase
 {
@@ -11,13 +12,13 @@ class DefaultValueBinderTest extends PHPUnit_Framework_TestCase
         if (!defined('PHPEXCEL_ROOT')) {
             define('PHPEXCEL_ROOT', APPLICATION_PATH . '/');
         }
-        require_once(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
+        require_once(PHPEXCEL_ROOT . '/Bootstrap.php');
     }
 
     protected function createCellStub()
     {
         // Create a stub for the Cell class.
-        $this->cellStub = $this->getMockBuilder('PHPExcel_Cell')
+        $this->cellStub = $this->getMockBuilder('\\PHPExcel\\Cell')
             ->disableOriginalConstructor()
             ->getMock();
         // Configure the stub.
@@ -33,7 +34,7 @@ class DefaultValueBinderTest extends PHPUnit_Framework_TestCase
     public function testBindValue($value)
     {
         $this->createCellStub();
-        $binder = new PHPExcel_Cell_DefaultValueBinder();
+        $binder = new \PHPExcel\Cell\DefaultValueBinder();
         $result = $binder->bindValue($this->cellStub, $value);
         $this->assertTrue($result);
     }
@@ -52,7 +53,7 @@ class DefaultValueBinderTest extends PHPUnit_Framework_TestCase
             array('123'),
             array('-123.456'),
             array('#REF!'),
-            array(new DateTime()),
+            array(new \DateTime()),
         );
     }
 
@@ -63,22 +64,22 @@ class DefaultValueBinderTest extends PHPUnit_Framework_TestCase
     {
         $args = func_get_args();
         $expectedResult = array_pop($args);
-        $result = call_user_func_array(array('PHPExcel_Cell_DefaultValueBinder','dataTypeForValue'), $args);
+        $result = call_user_func_array(array('\\PHPExcel\\Cell\\DefaultValueBinder','dataTypeForValue'), $args);
         $this->assertEquals($expectedResult, $result);
     }
 
     public function providerDataTypeForValue()
     {
-        return new testDataFileIterator('rawTestData/Cell/DefaultValueBinder.data');
+        return new testDataFileIteratorJson('rawTestData/Cell/DefaultValueBinder.json');
     }
 
     public function testDataTypeForRichTextObject()
     {
-        $objRichText = new PHPExcel_RichText();
+        $objRichText = new \PHPExcel\RichText();
         $objRichText->createText('Hello World');
 
-        $expectedResult = PHPExcel_Cell_DataType::TYPE_INLINE;
-        $result = call_user_func(array('PHPExcel_Cell_DefaultValueBinder','dataTypeForValue'), $objRichText);
+        $expectedResult = \PHPExcel\Cell\DataType::TYPE_INLINE;
+        $result = call_user_func(array('\\PHPExcel\\Cell\\DefaultValueBinder','dataTypeForValue'), $objRichText);
         $this->assertEquals($expectedResult, $result);
     }
 }
diff --git a/unitTests/Classes/src/Cell/HyperlinkTest.php b/unitTests/Classes/src/Cell/HyperlinkTest.php
index 42dff6a5..99825860 100644
--- a/unitTests/Classes/src/Cell/HyperlinkTest.php
+++ b/unitTests/Classes/src/Cell/HyperlinkTest.php
@@ -9,14 +9,14 @@ class HyperlinkTest extends PHPUnit_Framework_TestCase
         if (!defined('PHPEXCEL_ROOT')) {
             define('PHPEXCEL_ROOT', APPLICATION_PATH . '/');
         }
-        require_once(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
+        require_once(PHPEXCEL_ROOT . '/Bootstrap.php');
     }
 
     public function testGetUrl()
     {
         $urlValue = 'http://www.phpexcel.net';
 
-        $testInstance = new PHPExcel_Cell_Hyperlink($urlValue);
+        $testInstance = new \PHPExcel\Cell\Hyperlink($urlValue);
 
         $result = $testInstance->getUrl();
         $this->assertEquals($urlValue, $result);
@@ -27,9 +27,9 @@ class HyperlinkTest extends PHPUnit_Framework_TestCase
         $initialUrlValue = 'http://www.phpexcel.net';
         $newUrlValue = 'http://github.com/PHPOffice/PHPExcel';
 
-        $testInstance = new PHPExcel_Cell_Hyperlink($initialUrlValue);
+        $testInstance = new \PHPExcel\Cell\Hyperlink($initialUrlValue);
         $result = $testInstance->setUrl($newUrlValue);
-        $this->assertTrue($result instanceof PHPExcel_Cell_Hyperlink);
+        $this->assertTrue($result instanceof \PHPExcel\Cell\Hyperlink);
 
         $result = $testInstance->getUrl();
         $this->assertEquals($newUrlValue, $result);
@@ -39,7 +39,7 @@ class HyperlinkTest extends PHPUnit_Framework_TestCase
     {
         $tooltipValue = 'PHPExcel Web Site';
 
-        $testInstance = new PHPExcel_Cell_Hyperlink(null, $tooltipValue);
+        $testInstance = new \PHPExcel\Cell\Hyperlink(null, $tooltipValue);
 
         $result = $testInstance->getTooltip();
         $this->assertEquals($tooltipValue, $result);
@@ -50,9 +50,9 @@ class HyperlinkTest extends PHPUnit_Framework_TestCase
         $initialTooltipValue = 'PHPExcel Web Site';
         $newTooltipValue = 'PHPExcel Repository on Github';
 
-        $testInstance = new PHPExcel_Cell_Hyperlink(null, $initialTooltipValue);
+        $testInstance = new \PHPExcel\Cell\Hyperlink(null, $initialTooltipValue);
         $result = $testInstance->setTooltip($newTooltipValue);
-        $this->assertTrue($result instanceof PHPExcel_Cell_Hyperlink);
+        $this->assertTrue($result instanceof \PHPExcel\Cell\Hyperlink);
 
         $result = $testInstance->getTooltip();
         $this->assertEquals($newTooltipValue, $result);
@@ -63,7 +63,7 @@ class HyperlinkTest extends PHPUnit_Framework_TestCase
         $initialUrlValue = 'http://www.phpexcel.net';
         $newUrlValue = 'sheet://Worksheet1!A1';
 
-        $testInstance = new PHPExcel_Cell_Hyperlink($initialUrlValue);
+        $testInstance = new \PHPExcel\Cell\Hyperlink($initialUrlValue);
         $result = $testInstance->isInternal();
         $this->assertFalse($result);
 
@@ -76,9 +76,9 @@ class HyperlinkTest extends PHPUnit_Framework_TestCase
     {
         $urlValue = 'http://www.phpexcel.net';
         $tooltipValue = 'PHPExcel Web Site';
-        $initialExpectedHash = 'd84d713aed1dbbc8a7c5af183d6c7dbb';
+        $initialExpectedHash = '176f1ec64e84084db814481bd710b6b3';
 
-        $testInstance = new PHPExcel_Cell_Hyperlink($urlValue, $tooltipValue);
+        $testInstance = new \PHPExcel\Cell\Hyperlink($urlValue, $tooltipValue);
 
         $result = $testInstance->getHashCode();
         $this->assertEquals($initialExpectedHash, $result);
diff --git a/unitTests/rawTestData/Cell/DefaultValueBinder.json b/unitTests/rawTestData/Cell/DefaultValueBinder.json
new file mode 100644
index 00000000..9bb33a7f
--- /dev/null
+++ b/unitTests/rawTestData/Cell/DefaultValueBinder.json
@@ -0,0 +1,19 @@
+[null,"null"]
+[null,"null"]
+["#NULL!","e"]
+[false,"b"]
+[true,"b"]
+["FALSE","s"]
+["TRUE","s"]
+["","s"]
+["ABC","s"]
+["123","n"]
+[123,"n"]
+[0.123,"n"]
+["-123","n"]
+["1.23E4","n"]
+["-1.23E4","n"]
+["1.23E-4","n"]
+["000123","s"]
+["=123","f"]
+["#DIV\/0!","e"]
diff --git a/unitTests/testDataFileIteratorJson.php b/unitTests/testDataFileIteratorJson.php
new file mode 100644
index 00000000..c1c89d09
--- /dev/null
+++ b/unitTests/testDataFileIteratorJson.php
@@ -0,0 +1,63 @@
+<?php
+
+class testDataFileIteratorJson implements Iterator
+{
+    protected $file;
+    protected $key = 0;
+    protected $current;
+
+    public function __construct($file)
+    {
+        $this->file = fopen($file, 'r');
+    }
+
+    public function __destruct()
+    {
+        fclose($this->file);
+    }
+
+    public function rewind()
+    {
+        rewind($this->file);
+        $this->current = $this->_parseNextDataset();
+        $this->key = 0;
+    }
+
+    public function valid()
+    {
+        return !feof($this->file);
+    }
+
+    public function key()
+    {
+        return $this->key;
+    }
+
+    public function current()
+    {
+        return $this->current;
+    }
+
+    public function next()
+    {
+        $this->current = $this->_parseNextDataset();
+        $this->key++;
+    }
+
+    private function _parseNextDataset()
+    {
+        //    Read a line of test data from the file
+        do {
+            //    Only take lines that contain test data and that aren't commented out
+            $testDataRow = trim(fgets($this->file));
+        } while (($testDataRow > '') && ($testDataRow{0} === '#'));
+
+        //    Discard any comments at the end of the line
+        list($testData) = explode('//', $testDataRow);
+
+        //    Split data into an array of individual values and a result
+        $dataSet = json_decode(trim($testData));
+
+        return $dataSet;
+    }
+}