diff --git a/test/tools_updater_unittest.cpp b/test/tools_updater_unittest.cpp
index bc7417c..0f49494 100644
--- a/test/tools_updater_unittest.cpp
+++ b/test/tools_updater_unittest.cpp
@@ -6,6 +6,9 @@
 
 #include <gtest/gtest.h>
 
+namespace host_tool
+{
+
 using ::testing::Eq;
 using ::testing::Return;
 using ::testing::StrEq;
@@ -43,3 +46,5 @@
 
     updaterMain(&blobMock, &handlerMock, firmwareImage, signatureFile);
 }
+
+} // namespace host_tool