diff --git a/core/DbConnectionWrapper.php b/core/DbConnectionWrapper.php
index 6f352bc2e..5de337513 100644
--- a/core/DbConnectionWrapper.php
+++ b/core/DbConnectionWrapper.php
@@ -56,21 +56,12 @@ class DbConnectionWrapper
 	}
 
 	/**
-	 * mysqli object is really hard to mock as it contains lots of attributes & methods ! Thought we need to mock it to test transactions !
+	 * Use this to register a mock that will handle {@see mysqli::query()}
 	 *
-	 * To solve this, a new attribute exists and is only used in specific use cases, so there are just few things to mock.
-	 *
-	 * This object adds more readability than previous model with 2 attributes in {@see CMDBSource}.
-	 *
-	 * @used-by \CMDBSource
-	 *
-	 * @since 3.0.0 N°4325 Object creation
-	 *          This wrapper handles the 2 {@mysqli myqsli} attributes that were previously in {@see CMDBSource}
-	 *          To allow testing we added a second mysqli object (N°3513 in 2.7.5) and code became a bit confusing :/
-	 *          With this wrapper everything is in the same place, and we can express the intention more clearly !
+	 * @param \mysqli|null $oMysqli
+	 * @since 3.0.4 3.1.1 3.2.0 Param $oMysqli becomes nullable
 	 * @since 3.1.0-4 N°6848 backport of restoring cnx on null parameter value
 	 */
-
 	public static function SetDbConnectionMockForQuery(?mysqli $oMysqli = null): void
 	{
 		if (is_null($oMysqli)) {