diff --git a/tests/mocks/core/common.php b/tests/mocks/core/common.php
index 8466e47..55506a1 100644
--- a/tests/mocks/core/common.php
+++ b/tests/mocks/core/common.php
@@ -18,7 +18,8 @@
 	function &get_config()
 	{
 		$test = CI_TestCase::instance();
-		return $test->ci_get_config();
+		$config = $test->ci_get_config();
+		return $config;
 	}
 }