diff --git a/tests/php-unit-tests/src/BaseTestCase/ItopCustomDatamodelTestCase.php b/tests/php-unit-tests/src/BaseTestCase/ItopCustomDatamodelTestCase.php
index 98d2b7141..da53441af 100644
--- a/tests/php-unit-tests/src/BaseTestCase/ItopCustomDatamodelTestCase.php
+++ b/tests/php-unit-tests/src/BaseTestCase/ItopCustomDatamodelTestCase.php
@@ -190,6 +190,7 @@ abstract class ItopCustomDatamodelTestCase extends ItopDataTestCase
 			}
 			CMDBSource::CreateDB($oTestConfig->Get('db_name'));
 			MetaModel::Startup($sConfFile, false /* $bModelOnly */, true /* $bAllowCache */, false /* $bTraceSourceFiles */, $sTestEnv);
+            // N°7446 For some reason we need to create the DB schema before starting the MM, then only we can create the tables.
             MetaModel::DBCreate();
 
 			$this->MarkEnvironmentReady();