diff --git a/Test/Integration/Soundness.php b/Test/Integration/Soundness.php
index c86be25..1234a77 100644
--- a/Test/Integration/Soundness.php
+++ b/Test/Integration/Soundness.php
@@ -130,7 +130,7 @@ protected function with_json($sampler, $compiler = null)
     protected function getJSONCompiler()
     {
         return LUT\Llk::load(
-            new File\Read(__DIR__ . '/../../Grammar.pp')
+            new File\Read('hoa://Library/Json/Grammar.pp')
         );
     }