diff --git a/tests/Doctrine/Tests/DBAL/Functional/DataAccessTest.php b/tests/Doctrine/Tests/DBAL/Functional/DataAccessTest.php
index ded967225e1..1c013503ede 100644
--- a/tests/Doctrine/Tests/DBAL/Functional/DataAccessTest.php
+++ b/tests/Doctrine/Tests/DBAL/Functional/DataAccessTest.php
@@ -326,7 +326,7 @@ public function testDateArithmetics()
         $row = array_change_key_case($row, CASE_LOWER);
 
         $diff = floor( (strtotime('2010-01-01')-time()) / 3600 / 24);
-        //$this->assertEquals($diff, (int)$row['diff'], "Date difference should be approx. ".$diff." days.", 1);
+        $this->assertEquals($diff, (int)$row['diff'], "Date difference should be approx. ".$diff." days.", 1);
         $this->assertEquals('2010-01-11', date('Y-m-d', strtotime($row['add_days'])), "Adding date should end up on 2010-01-11");
         $this->assertEquals('2009-12-22', date('Y-m-d', strtotime($row['sub_days'])), "Subtracting date should end up on 2009-12-22");
         $this->assertEquals('2010-03-01', date('Y-m-d', strtotime($row['add_month'])), "Adding month should end up on 2010-03-01");