API keys not overridable

It seems that it is not possible to override API keys in f.ex. settings.php.

When putting the following in settings.php, the Mollom Drupal module still reports "The Mollom API keys are not configured yet."

$config['mollom.settings']['keys']['public'] = '...';
$config['mollom.settings']['keys']['private'] = '...';

This seems to be because the DrupalClient class get an editable config object, and that fetches values from the database, they are not overridden through $config