diff --git a/tests/NodaTimeSplitterTest.php b/tests/NodaTimeSplitterTest.php
index 0460df6..265da26 100644
--- a/tests/NodaTimeSplitterTest.php
+++ b/tests/NodaTimeSplitterTest.php
@@ -7,7 +7,7 @@
 declare(strict_types = 1);
 use PHPUnit\Framework\TestCase;
 require_once __DIR__ . "/../src/NodaTimeSplitter.php";
-require_once __DIR__ . "/../../MD_STD/MD_STD.php";
+require_once __DIR__ . "/../../MD_STD/src/MD_STD.php";
 
 /**
  * Tests for home page.