tests+tools: minor code cleanup

Change-Id: Ic3356d4a18a8e5eeb45fc076fc0563c3d1549c8a
diff --git a/tests/daemon/face/transport.t.cpp b/tests/daemon/face/transport.t.cpp
index d586c20..747622e 100644
--- a/tests/daemon/face/transport.t.cpp
+++ b/tests/daemon/face/transport.t.cpp
@@ -45,6 +45,7 @@
 namespace tests {
 
 namespace mpl = boost::mpl;
+using namespace nfd::tests;
 
 BOOST_AUTO_TEST_SUITE(Face)
 BOOST_AUTO_TEST_SUITE(TestTransport)
@@ -211,7 +212,7 @@
   BOOST_CHECK_EQUAL(transport->getExpirationTime(), time::steady_clock::TimePoint::max());
 }
 
-class DummyTransportFixture : public nfd::tests::GlobalIoFixture
+class DummyTransportFixture : public GlobalIoFixture
 {
 protected:
   DummyTransportFixture()