diff --git a/core/lib/Thelia/Tests/Constraint/Validator/DateParamTest.php b/core/lib/Thelia/Tests/Constraint/Validator/DateParamTest.php
index 1b3739c5c..45b7f00ae 100644
--- a/core/lib/Thelia/Tests/Constraint/Validator/DateParamTest.php
+++ b/core/lib/Thelia/Tests/Constraint/Validator/DateParamTest.php
@@ -121,7 +121,7 @@ class DateParamTest extends \PHPUnit_Framework_TestCase
      * Test is the object is serializable
      * If no data is lost during the process
      */
-    protected function isSerializableTest()
+    public function isSerializableTest()
     {
         $adapter = new CouponBaseAdapter();
         $dateValidator = new \DateTime("2012-07-08");
diff --git a/core/lib/Thelia/Tests/Constraint/Validator/IntegerParamTest.php b/core/lib/Thelia/Tests/Constraint/Validator/IntegerParamTest.php
index c7b5b2ac0..0c7184dde 100644
--- a/core/lib/Thelia/Tests/Constraint/Validator/IntegerParamTest.php
+++ b/core/lib/Thelia/Tests/Constraint/Validator/IntegerParamTest.php
@@ -123,7 +123,7 @@ class IntegerParamTest extends \PHPUnit_Framework_TestCase
      * Test is the object is serializable
      * If no data is lost during the process
      */
-    protected function isSerializableTest()
+    public function isSerializableTest()
     {
         $adapter = new CouponBaseAdapter();
         $intValidator = 42;
diff --git a/core/lib/Thelia/Tests/Constraint/Validator/IntervalParamTest.php b/core/lib/Thelia/Tests/Constraint/Validator/IntervalParamTest.php
index 05dad2f0c..77abdbe24 100644
--- a/core/lib/Thelia/Tests/Constraint/Validator/IntervalParamTest.php
+++ b/core/lib/Thelia/Tests/Constraint/Validator/IntervalParamTest.php
@@ -147,7 +147,7 @@ class IntervalParamTest extends \PHPUnit_Framework_TestCase
      * Test is the object is serializable
      * If no data is lost during the process
      */
-    protected function isSerializableTest()
+    public function isSerializableTest()
     {
         $adapter = new CouponBaseAdapter();
         $dateValidatorStart = new \DateTime("2012-07-08");
diff --git a/core/lib/Thelia/Tests/Constraint/Validator/PriceParamTest.php b/core/lib/Thelia/Tests/Constraint/Validator/PriceParamTest.php
index 7ccc508aa..1cdee6bd2 100644
--- a/core/lib/Thelia/Tests/Constraint/Validator/PriceParamTest.php
+++ b/core/lib/Thelia/Tests/Constraint/Validator/PriceParamTest.php
@@ -199,7 +199,7 @@ class PriceParamTest extends \PHPUnit_Framework_TestCase
      * Test is the object is serializable
      * If no data is lost during the process
      */
-    protected function isSerializableTest()
+    public function isSerializableTest()
     {
         $adapter = new CouponBaseAdapter();
         $priceValidator = 42.50;
diff --git a/core/lib/Thelia/Tests/Constraint/Validator/QuantityParamTest.php b/core/lib/Thelia/Tests/Constraint/Validator/QuantityParamTest.php
index bd83d45db..198e6e611 100644
--- a/core/lib/Thelia/Tests/Constraint/Validator/QuantityParamTest.php
+++ b/core/lib/Thelia/Tests/Constraint/Validator/QuantityParamTest.php
@@ -159,7 +159,7 @@ class QuantityParamTest extends \PHPUnit_Framework_TestCase
      * Test is the object is serializable
      * If no data is lost during the process
      */
-    protected function isSerializableTest()
+    public function isSerializableTest()
     {
         $adapter = new CouponBaseAdapter();
         $intValidator = 42;
diff --git a/core/lib/Thelia/Tests/Constraint/Validator/RepeatedDateParamTest.php b/core/lib/Thelia/Tests/Constraint/Validator/RepeatedDateParamTest.php
index 5766cb6b1..875453666 100644
--- a/core/lib/Thelia/Tests/Constraint/Validator/RepeatedDateParamTest.php
+++ b/core/lib/Thelia/Tests/Constraint/Validator/RepeatedDateParamTest.php
@@ -270,7 +270,7 @@ class RepeatedDateParamTest extends \PHPUnit_Framework_TestCase
      * Test is the object is serializable
      * If no data is lost during the process
      */
-    protected function isSerializableTest()
+    public function isSerializableTest()
     {
         $adapter = new CouponBaseAdapter();
         $startDateValidator = new \DateTime("2012-07-08");
diff --git a/core/lib/Thelia/Tests/Constraint/Validator/RepeatedIntervalParamTest.php b/core/lib/Thelia/Tests/Constraint/Validator/RepeatedIntervalParamTest.php
index 22a105ffb..2b3bd00c8 100644
--- a/core/lib/Thelia/Tests/Constraint/Validator/RepeatedIntervalParamTest.php
+++ b/core/lib/Thelia/Tests/Constraint/Validator/RepeatedIntervalParamTest.php
@@ -383,7 +383,7 @@ class RepeatedIntervalParamTest extends \PHPUnit_Framework_TestCase
      * Test is the object is serializable
      * If no data is lost during the process
      */
-    protected function isSerializableTest()
+    public function isSerializableTest()
     {
         $adapter = new CouponBaseAdapter();
         $startDateValidator = new \DateTime("2012-07-08");