When testing, catptcha behavior is switched to production one on tearDown

library/ZendAfi/Form/Element/Captcha.php

@@ -27,6 +27,10 @@ class ZendAfi_Form_Element_Captcha extends Zend_Form_Element_Captcha {
 		static::$_be_valid = true;
 	}
 
+	public static function reset() {
+		static::$_be_valid = false;
+	}
+
 	public function isValid($value, $context = null) {
 		return static::$_be_valid ?	true : parent::isValid($value, $context);
 	}

tests/application/modules/AbstractControllerTestCase.php

@@ -148,6 +148,7 @@ abstract class AbstractControllerTestCase extends Zend_Test_PHPUnit_ControllerTe
 		Class_WebService_Abstract::resetHttpClient();
 		Class_WebService_AllServices::setHttpClient(null);
 		Class_I18n::reset();
+    ZendAfi_Form_Element_Captcha::reset();
 	}