diff --git a/src/Framework/Assert.php b/src/Framework/Assert.php
index d1765212168..8b1b1f5ff24 100644
--- a/src/Framework/Assert.php
+++ b/src/Framework/Assert.php
@@ -466,7 +466,7 @@ public static function assertAttributeNotCount($expectedCount, $haystackAttribut
      * @param boolean $canonicalize
      * @param boolean $ignoreCase
      */
-    public static function assertEquals($expected, $actual, $message = '', $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+    public static function assertEquals($expected, $actual, $message = '', $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
     {
         $constraint = new PHPUnit_Framework_Constraint_IsEqual(
           $expected, $delta, $maxDepth, $canonicalize, $ignoreCase
@@ -487,7 +487,7 @@ public static function assertEquals($expected, $actual, $message = '', $delta =
      * @param boolean $canonicalize
      * @param boolean $ignoreCase
      */
-    public static function assertAttributeEquals($expected, $actualAttributeName, $actualClassOrObject, $message = '', $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+    public static function assertAttributeEquals($expected, $actualAttributeName, $actualClassOrObject, $message = '', $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
     {
         self::assertEquals(
           $expected,
@@ -512,7 +512,7 @@ public static function assertAttributeEquals($expected, $actualAttributeName, $a
      * @param boolean $ignoreCase
      * @since  Method available since Release 2.3.0
      */
-    public static function assertNotEquals($expected, $actual, $message = '', $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+    public static function assertNotEquals($expected, $actual, $message = '', $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
     {
         $constraint = new PHPUnit_Framework_Constraint_Not(
           new PHPUnit_Framework_Constraint_IsEqual(
@@ -535,7 +535,7 @@ public static function assertNotEquals($expected, $actual, $message = '', $delta
      * @param boolean $canonicalize
      * @param boolean $ignoreCase
      */
-    public static function assertAttributeNotEquals($expected, $actualAttributeName, $actualClassOrObject, $message = '', $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+    public static function assertAttributeNotEquals($expected, $actualAttributeName, $actualClassOrObject, $message = '', $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
     {
         self::assertNotEquals(
           $expected,
@@ -2526,7 +2526,7 @@ public static function arrayHasKey($key)
      * @return PHPUnit_Framework_Constraint_IsEqual
      * @since  Method available since Release 3.0.0
      */
-    public static function equalTo($value, $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+    public static function equalTo($value, $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
     {
         return new PHPUnit_Framework_Constraint_IsEqual(
           $value, $delta, $maxDepth, $canonicalize, $ignoreCase
@@ -2547,7 +2547,7 @@ public static function equalTo($value, $delta = 0, $maxDepth = 10, $canonicalize
      * @return PHPUnit_Framework_Constraint_Attribute
      * @since  Method available since Release 3.1.0
      */
-    public static function attributeEqualTo($attributeName, $value, $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+    public static function attributeEqualTo($attributeName, $value, $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
     {
         return self::attribute(
           self::equalTo(
diff --git a/src/Framework/Assert/Functions.php b/src/Framework/Assert/Functions.php
index 7b4267c6995..041ce201b58 100644
--- a/src/Framework/Assert/Functions.php
+++ b/src/Framework/Assert/Functions.php
@@ -206,7 +206,7 @@ function assertAttributeEmpty($haystackAttributeName, $haystackClassOrObject, $m
  * @param  boolean $canonicalize
  * @param  boolean $ignoreCase
  */
-function assertAttributeEquals($expected, $actualAttributeName, $actualClassOrObject, $message = '', $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+function assertAttributeEquals($expected, $actualAttributeName, $actualClassOrObject, $message = '', $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
 {
     return call_user_func_array(
       'PHPUnit_Framework_Assert::assertAttributeEquals',
@@ -404,7 +404,7 @@ function assertAttributeNotEmpty($haystackAttributeName, $haystackClassOrObject,
  * @param  boolean $canonicalize
  * @param  boolean $ignoreCase
  */
-function assertAttributeNotEquals($expected, $actualAttributeName, $actualClassOrObject, $message = '', $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+function assertAttributeNotEquals($expected, $actualAttributeName, $actualClassOrObject, $message = '', $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
 {
     return call_user_func_array(
       'PHPUnit_Framework_Assert::assertAttributeNotEquals',
@@ -654,7 +654,7 @@ function assertEqualXMLStructure(DOMElement $expectedElement, DOMElement $actual
  * @param  boolean $canonicalize
  * @param  boolean $ignoreCase
  */
-function assertEquals($expected, $actual, $message = '', $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+function assertEquals($expected, $actual, $message = '', $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
 {
     return call_user_func_array(
       'PHPUnit_Framework_Assert::assertEquals',
@@ -1039,7 +1039,7 @@ function assertNotEmpty($actual, $message = '')
  * @param  boolean $ignoreCase
  * @since  Method available since Release 2.3.0
  */
-function assertNotEquals($expected, $actual, $message = '', $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+function assertNotEquals($expected, $actual, $message = '', $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
 {
     return call_user_func_array(
       'PHPUnit_Framework_Assert::assertNotEquals',
@@ -1848,7 +1848,7 @@ function attribute(PHPUnit_Framework_Constraint $constraint, $attributeName)
  * @return PHPUnit_Framework_Constraint_Attribute
  * @since  Method available since Release 3.1.0
  */
-function attributeEqualTo($attributeName, $value, $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+function attributeEqualTo($attributeName, $value, $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
 {
     return call_user_func_array(
       'PHPUnit_Framework_Assert::attributeEqualTo',
@@ -1961,7 +1961,7 @@ function containsOnlyInstancesOf($classname)
  * @return PHPUnit_Framework_Constraint_IsEqual
  * @since  Method available since Release 3.0.0
  */
-function equalTo($value, $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+function equalTo($value, $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
 {
     return call_user_func_array(
       'PHPUnit_Framework_Assert::equalTo',
diff --git a/src/Framework/Constraint/IsEqual.php b/src/Framework/Constraint/IsEqual.php
index 7d4b38a236a..cd7a0c0b590 100644
--- a/src/Framework/Constraint/IsEqual.php
+++ b/src/Framework/Constraint/IsEqual.php
@@ -74,7 +74,7 @@ class PHPUnit_Framework_Constraint_IsEqual extends PHPUnit_Framework_Constraint
     /**
      * @var float
      */
-    protected $delta = 0;
+    protected $delta = 0.0;
 
     /**
      * @var integer
@@ -104,7 +104,7 @@ class PHPUnit_Framework_Constraint_IsEqual extends PHPUnit_Framework_Constraint
      * @param  boolean                     $ignoreCase
      * @throws PHPUnit_Framework_Exception
      */
-    public function __construct($value, $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
+    public function __construct($value, $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
     {
         parent::__construct();
 
diff --git a/tests/Framework/AssertTest.php b/tests/Framework/AssertTest.php
index b1886503c0f..1736520861a 100644
--- a/tests/Framework/AssertTest.php
+++ b/tests/Framework/AssertTest.php
@@ -946,7 +946,7 @@ public function notSameProvider()
      * @covers PHPUnit_Framework_Assert::assertEquals
      * @dataProvider equalProvider
      */
-    public function testAssertEqualsSucceeds($a, $b, $delta = 0, $canonicalize = false, $ignoreCase = false)
+    public function testAssertEqualsSucceeds($a, $b, $delta = 0.0, $canonicalize = false, $ignoreCase = false)
     {
         $this->assertEquals($a, $b, '', $delta, 10, $canonicalize, $ignoreCase);
     }
@@ -955,7 +955,7 @@ public function testAssertEqualsSucceeds($a, $b, $delta = 0, $canonicalize = fal
      * @covers PHPUnit_Framework_Assert::assertEquals
      * @dataProvider notEqualProvider
      */
-    public function testAssertEqualsFails($a, $b, $delta = 0, $canonicalize = false, $ignoreCase = false)
+    public function testAssertEqualsFails($a, $b, $delta = 0.0, $canonicalize = false, $ignoreCase = false)
     {
         try {
             $this->assertEquals($a, $b, '', $delta, 10, $canonicalize, $ignoreCase);
@@ -972,7 +972,7 @@ public function testAssertEqualsFails($a, $b, $delta = 0, $canonicalize = false,
      * @covers PHPUnit_Framework_Assert::assertNotEquals
      * @dataProvider notEqualProvider
      */
-    public function testAssertNotEqualsSucceeds($a, $b, $delta = 0, $canonicalize = false, $ignoreCase = false)
+    public function testAssertNotEqualsSucceeds($a, $b, $delta = 0.0, $canonicalize = false, $ignoreCase = false)
     {
         $this->assertNotEquals($a, $b, '', $delta, 10, $canonicalize, $ignoreCase);
     }
@@ -981,7 +981,7 @@ public function testAssertNotEqualsSucceeds($a, $b, $delta = 0, $canonicalize =
      * @covers PHPUnit_Framework_Assert::assertNotEquals
      * @dataProvider equalProvider
      */
-    public function testAssertNotEqualsFails($a, $b, $delta = 0, $canonicalize = false, $ignoreCase = false)
+    public function testAssertNotEqualsFails($a, $b, $delta = 0.0, $canonicalize = false, $ignoreCase = false)
     {
         try {
             $this->assertNotEquals($a, $b, '', $delta, 10, $canonicalize, $ignoreCase);