diff --git a/tests/cpp/tree/test_param.cc b/tests/cpp/tree/test_param.cc
index 1b9164148..a569556e3 100644
--- a/tests/cpp/tree/test_param.cc
+++ b/tests/cpp/tree/test_param.cc
@@ -1,5 +1,5 @@
 // Copyright by Contributors
-#include "../../src/tree/param.h"
+#include "../../../src/tree/param.h"
 
 #include "../helpers.h"