diff --git a/tests/test_framework/phpbb_functional_test_case.php b/tests/test_framework/phpbb_functional_test_case.php
index 59579c1c33..1bcc3928df 100644
--- a/tests/test_framework/phpbb_functional_test_case.php
+++ b/tests/test_framework/phpbb_functional_test_case.php
@@ -210,7 +210,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 			}
 		}
 
-		$lang_path = "./phpBB/language/en/$lang_file.php";
+		$lang_path = __DIR__ . "/../../phpBB/language/en/$lang_file.php";
 
 		$lang = array();