diff --git a/tests/codeigniter/core/Output_test.php b/tests/codeigniter/core/Output_test.php
index d825240..728df3b 100644
--- a/tests/codeigniter/core/Output_test.php
+++ b/tests/codeigniter/core/Output_test.php
@@ -29,8 +29,8 @@
 
 		$this->output->set_content_type('text/plain', 'WINDOWS-1251');
 		$this->assertEquals(
-			'text/plain; charset=windows-1251',		// Character set is converted to lowercase
-			$this->output->get_header('content-type')	// Case-insensitive comparison
+			'text/plain; charset=WINDOWS-1251',
+			$this->output->get_header('content-type')
 		);
 	}