diff --git a/tests/Mongolid/Serializer/Type/ObjectIDTest.php b/tests/Mongolid/Serializer/Type/ObjectIDTest.php
index <HASH>..<HASH> 100644
--- a/tests/Mongolid/Serializer/Type/ObjectIDTest.php
+++ b/tests/Mongolid/Serializer/Type/ObjectIDTest.php
@@ -25,6 +25,7 @@ class ObjectIDTest extends TestCase
      */
     public function setUp()
     {
+        parent::setUp();
         $this->mongoId = new MongoObjectID($this->stringId);
     }
 
diff --git a/tests/Mongolid/Serializer/Type/UTCDatetimeTest.php b/tests/Mongolid/Serializer/Type/UTCDatetimeTest.php
index <HASH>..<HASH> 100644
--- a/tests/Mongolid/Serializer/Type/UTCDatetimeTest.php
+++ b/tests/Mongolid/Serializer/Type/UTCDatetimeTest.php
@@ -26,6 +26,7 @@ class UTCDateTimeTest extends TestCase
      */
     public function setUp()
     {
+        parent::setUp();
         $now = DateTime::createFromFormat('Y-m-d H:i:s', $this->formatedDate);
         $this->mongoDate = new MongoUTCDateTime($now->getTimestamp()*1000);
     }
Added missing parent::setUp calls