diff --git a/modules/unittest/classes/Kohana/Unittest/TestCase.php b/modules/unittest/classes/Kohana/Unittest/TestCase.php
index d47d69f..dcae4ef 100644
--- a/modules/unittest/classes/Kohana/Unittest/TestCase.php
+++ b/modules/unittest/classes/Kohana/Unittest/TestCase.php
@@ -219,7 +219,7 @@ abstract class Kohana_Unittest_TestCase extends PHPUnit_Framework_TestCase {
 			return self::assertAttributeType($expected, $attributeName, $classOrObject, $message);
 		}
 
-		return self::assertAttributeInternalType($expected, $attributeName, $classOrObject, $message);
+		return parent::assertAttributeInternalType($expected, $attributeName, $classOrObject, $message);
 	}
 
 	/**
@@ -237,7 +237,7 @@ abstract class Kohana_Unittest_TestCase extends PHPUnit_Framework_TestCase {
 			return self::assertNotType($expected, $actual, $message);
 		}
 
-		return self::assertNotInternalType($expected, $actual, $message);
+		return parent::assertNotInternalType($expected, $actual, $message);
 	}
 
 	/**