tests: namespace cleanup

Change-Id: I6b9ee82a4cb3b97c82ea111495ec07efddc8d825
diff --git a/tests/test-lsdb.cpp b/tests/test-lsdb.cpp
index 323db04..28cf59e 100644
--- a/tests/test-lsdb.cpp
+++ b/tests/test-lsdb.cpp
@@ -32,8 +32,7 @@
 
 #include <unistd.h>
 
-namespace nlsr {
-namespace test {
+namespace nlsr::tests {
 
 class LsdbFixture : public IoKeyChainFixture
 {
@@ -464,5 +463,4 @@
 
 BOOST_AUTO_TEST_SUITE_END() // TestLsdb
 
-} // namespace test
-} // namespace nlsr
+} // namespace nlsr::tests