diff --git a/tests/unit-tests/protocol-detail.t.cpp b/tests/unit-tests/protocol-detail.t.cpp
index d022d19..6157d61 100644
--- a/tests/unit-tests/protocol-detail.t.cpp
+++ b/tests/unit-tests/protocol-detail.t.cpp
@@ -18,10 +18,10 @@
  * See AUTHORS.md for complete list of ndncert authors and contributors.
  */
 
-#include "protocol-detail/info-encoder.hpp"
-#include "protocol-detail/probe-encoder.hpp"
-#include "protocol-detail/new-renew-revoke-encoder.hpp"
-#include "protocol-detail/challenge-encoder.hpp"
+#include "detail/info-encoder.hpp"
+#include "detail/probe-encoder.hpp"
+#include "detail/new-renew-revoke-encoder.hpp"
+#include "detail/challenge-encoder.hpp"
 #include "test-common.hpp"
 
 namespace ndn {