tests: TcpTransport test suite improvements

refs #3306

Change-Id: I3b342b4df13db7996b03de7d1bed65b579798f85
diff --git a/tests/daemon/face/null-face.t.cpp b/tests/daemon/face/null-face.t.cpp
index fbc5312..16d1a11 100644
--- a/tests/daemon/face/null-face.t.cpp
+++ b/tests/daemon/face/null-face.t.cpp
@@ -25,9 +25,7 @@
 
 #include "face/null-face.hpp"
 #include "face/lp-face-wrapper.hpp"
-#include "transport-properties.hpp"
-
-#include "tests/test-common.hpp"
+#include "transport-test-common.hpp"
 
 namespace nfd {
 namespace face {