tests+tools: minor code cleanup

Change-Id: Ic3356d4a18a8e5eeb45fc076fc0563c3d1549c8a
diff --git a/tests/daemon/table/dead-nonce-list.t.cpp b/tests/daemon/table/dead-nonce-list.t.cpp
index ea7866c..1cd32eb 100644
--- a/tests/daemon/table/dead-nonce-list.t.cpp
+++ b/tests/daemon/table/dead-nonce-list.t.cpp
@@ -110,7 +110,7 @@
   scheduler::ScopedEventId addNonceEvent;
 };
 
-const time::nanoseconds PeriodicalInsertionFixture::LIFETIME = time::milliseconds(200);
+const time::nanoseconds PeriodicalInsertionFixture::LIFETIME = 200_ms;
 
 BOOST_FIXTURE_TEST_CASE(Lifetime, PeriodicalInsertionFixture)
 {