tests: respect naming conventions and improve nesting of some test suites

Change-Id: I65af858bc6d10197c6ee11111fa9f7c1faa617ef
Refs: #2497
diff --git a/tests/core/ndebug.t.cpp b/tests/core/ndebug.t.cpp
index a624b6b..3af09aa 100644
--- a/tests/core/ndebug.t.cpp
+++ b/tests/core/ndebug.t.cpp
@@ -38,6 +38,8 @@
   // in release builds, assertion shouldn't execute
   BOOST_ASSERT(false);
 #endif
+  // Trivial check to avoid "test case did not check any assertions" message from Boost.Test
+  BOOST_CHECK(true);
 }
 
 BOOST_AUTO_TEST_CASE(SideEffect)