Hide/Remove core simpleTests in Drupal 7 I would like to remove the core tests that show up when I activate the Testing (simpletest) module. I have created my own tests for custom modules and I would like those to be the only testing options available to the user. How can I do this?
You can implement hook_simpletest_alter, e.g.

function hook_simpletest_alter(&amp;$groups) {
  // An alternative session handler module would not want to run the original
  // Session HTTPS handling test because it checks the sessions table in the
  // database.
  unset($groups['Session']['testHttpsSession']);
}