Drupal module is incompatibile with third-party Simpletest cases

Any Simpletest test case depending on civicrm will crash during setUp() on the second test, with an error like,
> "Could not find access_callback in path tree, Could not find access_arguments in path tree, Could not find page_callback in path tree, Could not find page_arguments in path tree, Could not find is_ssl in path tree"

Try extending this wrapper class when writing Simpletest cases:
<pre>
class civicrm_simpletest_case extends DrupalWebTestCase
{
function setUp(/* requires */)
{
$requires = func_get_args();
$requires = array_merge(array('civicrm'), $requires);
parent::setUp();
foreach ($requires as $module)

{ drupal_install_modules(array($module)); }

$this->assertTrue(civicrm_initialize(), "Civicrm couldn't be initialized");
}
function tearDown()

{ //XXX this is the workaround: CRM_Core_Menu::$_items = null; parent::tearDown(); }

}
</pre>