update header files in tests

Change-Id: Ibfffb9367349f58eeb193350bad34fdfccd8c553
diff --git a/tests/unit-tests/enc-tlv.t.cpp b/tests/unit-tests/enc-tlv.t.cpp
index 56817d3..99c5fbe 100644
--- a/tests/unit-tests/enc-tlv.t.cpp
+++ b/tests/unit-tests/enc-tlv.t.cpp
@@ -18,9 +18,9 @@
  * See AUTHORS.md for complete list of ndncert authors and contributors.
  */
 
-#include "boost-test.hpp"
 #include "crypto-support/crypto-helper.hpp"
 #include "crypto-support/enc-tlv.hpp"
+#include "test-common.hpp"
 
 namespace ndn {
 namespace ndncert {