tests+tools: minor code cleanup

Change-Id: Ic3356d4a18a8e5eeb45fc076fc0563c3d1549c8a
diff --git a/tests/daemon/fw/multicast-strategy.t.cpp b/tests/daemon/fw/multicast-strategy.t.cpp
index a6d9be6..e1c4027 100644
--- a/tests/daemon/fw/multicast-strategy.t.cpp
+++ b/tests/daemon/fw/multicast-strategy.t.cpp
@@ -34,9 +34,7 @@
 namespace fw {
 namespace tests {
 
-using namespace nfd::tests;
-
-typedef StrategyTester<MulticastStrategy> MulticastStrategyTester;
+using MulticastStrategyTester = StrategyTester<MulticastStrategy>;
 NFD_REGISTER_STRATEGY(MulticastStrategyTester);
 
 class MulticastStrategyFixture : public GlobalIoTimeFixture