Fix local_to_gmt()
diff --git a/tests/codeigniter/helpers/date_helper_test.php b/tests/codeigniter/helpers/date_helper_test.php
index 1d397ac..8258c92 100644
--- a/tests/codeigniter/helpers/date_helper_test.php
+++ b/tests/codeigniter/helpers/date_helper_test.php
@@ -196,9 +196,9 @@
 	public function test_local_to_gmt()
 	{
 		$this->assertEquals(
-			gmmktime(
-				date('G', $this->time), date('i', $this->time), date('s', $this->time),
-				date('n', $this->time), date('j', $this->time), date('Y', $this->time)
+			mktime(
+				gmdate('G', $this->time), gmdate('i', $this->time), gmdate('s', $this->time),
+				gmdate('n', $this->time), gmdate('j', $this->time), gmdate('Y', $this->time)
 			),
 			local_to_gmt($this->time)
 		);