diff --git a/src/infrastructure/cluster/PhabricatorDatabaseRef.php b/src/infrastructure/cluster/PhabricatorDatabaseRef.php
--- a/src/infrastructure/cluster/PhabricatorDatabaseRef.php
+++ b/src/infrastructure/cluster/PhabricatorDatabaseRef.php
@@ -358,10 +358,6 @@
       'timeout' => 15,
     );
 
-    // TODO: Remove this once the MySQL connector has proper support
-    // for it, see T6710.
-    ini_set('mysql.connect_timeout', $spec['timeout']);
-
     return PhabricatorEnv::newObjectFromConfig(
       'mysql.implementation',
       array(