diff --git a/tests/unittests/string_unittest.cc b/tests/unittests/string_unittest.cc
index 82fec1f82..cd0d0ac1d 100644
--- a/tests/unittests/string_unittest.cc
+++ b/tests/unittests/string_unittest.cc
@@ -2,9 +2,9 @@
 // reserved. Use of this source code is governed by a BSD-style license that
 // can be found in the LICENSE file.
 
-#include "include/cef_string.h"
-#include "include/cef_string_list.h"
-#include "include/cef_string_map.h"
+#include "include/internal/cef_string.h"
+#include "include/internal/cef_string_list.h"
+#include "include/internal/cef_string_map.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include <map>
 #include <vector>