diff --git a/tests/php-unit-tests/unitary-tests/core/DBObject/DBObjectSetTest.php b/tests/php-unit-tests/unitary-tests/core/DBObject/DBObjectSetTest.php
index 3a8085443..2a74b6908 100644
--- a/tests/php-unit-tests/unitary-tests/core/DBObject/DBObjectSetTest.php
+++ b/tests/php-unit-tests/unitary-tests/core/DBObject/DBObjectSetTest.php
@@ -4,12 +4,28 @@ use Combodo\iTop\Test\UnitTest\ItopDataTestCase;
 
 class DBObjectSetTest extends ItopDataTestCase
 {
+	public const USE_TRANSACTION = true;
+
+	protected function setUp(): void
+	{
+		parent::setUp(); // TODO: Change the autogenerated stub
+		$this->CreateURs();
+	}
+
 	protected function tearDown(): void
 	{
 		CMDBSource::TriggerExceptionWhenSqlQuery(null);
 		parent::tearDown(); // TODO: Change the autogenerated stub
 	}
 
+	private function CreateURs()
+	{
+		$this->CreateTestOrganization();
+		for ($i = 0; $i < 10; $i++) {
+			$this->CreateTicket($i);
+		}
+	}
+
 	public function testCount()
 	{
 		$oSearch = DBObjectSearch::FromOQL_AllData("SELECT UserRequest");
@@ -20,7 +36,7 @@ class DBObjectSetTest extends ItopDataTestCase
 		$this->assertEquals($iCount, $oSet->Count());
 		$this->assertEquals($iCount, $oSet->CountWithLimit(0));
 		$this->assertTrue($oSet->CountExceeds(0));
-		
+
 		//no DB SQL query: exception will be raised after here
 		CMDBSource::TriggerExceptionWhenSqlQuery(__METHOD__.' :'.__LINE__);
 		$this->assertEquals($iCount, $oSet->Count(), 'should use cache and not call DB again');