diff --git a/tests/io-fixture.hpp b/tests/io-fixture.hpp
index cdd2713..20d3e5b 100644
--- a/tests/io-fixture.hpp
+++ b/tests/io-fixture.hpp
@@ -24,7 +24,7 @@
 
 #include <boost/asio/io_service.hpp>
 
-namespace ndn::tests {
+namespace psync::tests {
 
 class IoFixture : public ClockFixture
 {
@@ -46,6 +46,6 @@
   boost::asio::io_service m_io;
 };
 
-} // namespace ndn::tests
+} // namespace psync::tests
 
 #endif // PSYNC_TESTS_IO_FIXTURE_HPP