Simpletest: Captcha: Call to undefined method CaptchaAdminTestCase::assertUrl()

$ php run-tests.sh --all --verbose

Fatal error: Call to undefined method CaptchaAdminTestCase::assertUrl() in /Volumes/Users HD/kenorb/Sites/coi/public_html/sites/all/modules/captcha/captcha.test on line 502

Call Stack:
    0.0032     473500   1. {main}() /Volumes/Users HD/kenorb/Sites/coi/public_html/scripts/run-tests.sh:0
    0.0069     804788   2. simpletest_script_execute_batch() /Volumes/Users HD/kenorb/Sites/coi/public_html/scripts/run-tests.sh:29
    0.6433   44163168   3. simpletest_script_run_one_test($test_id = '7880123', $test_class = 'CaptchaAdminTestCase') /Volumes/Users HD/kenorb/Sites/coi/public_html/scripts/run-tests.sh:331
    2.1302   58124444   4. DrupalTestCase->run() /Volumes/Users HD/kenorb/Sites/coi/public_html/scripts/run-tests.sh:383
   38.7874   60263772   5. CaptchaAdminTestCase->testCaptchAdminLinks() /Volumes/Users HD/kenorb/Sites/coi/public_html/modules/simpletest/drupal_web_test_case.php:429


Variables in local scope (#5):
  $add_comment_url = 'http://coi/comment/reply/1'
  $edit = array ('captcha_type' => 'captcha/Math')
  $node = class stdClass { public $type = 'page'; public $comment = 2; public $body = 's586418VXREJnGQvYqSGI2z1jfKmB4J2U7r4mti'; public $title = 's586418oJW8YwJj'; public $changed = 1304693716; public $format = 0; public $moderate = 0; public $promote = 0; public $revision = 1; public $log = ''; public $status = 1; public $sticky = 0; public $revisions = NULL; public $taxonomy = NULL; public $uid = '4'; public $is_new = TRUE; public $teaser = ''; public $created = 1304693716; public $timestamp = 1304693716; public $vid = '1'; public $language = ''; public $tnid = 0; public $translate = 0; public $nid = '1' }

array(4) {
  ["type"]=>
  int(1)
  ["message"]=>
  string(58) "Call to undefined method CaptchaAdminTestCase::assertUrl()"
  ["file"]=>
  string(85) "/Volumes/Users HD/kenorb/Sites/coi/public_html/sites/all/modules/captcha/captcha.test"
  ["line"]=>
  int(502)
}