diff --git a/requester/test/mock_request.hpp b/requester/test/mock_request.hpp
index b8e9efb..8b51a03 100644
--- a/requester/test/mock_request.hpp
+++ b/requester/test/mock_request.hpp
@@ -11,14 +11,12 @@
 namespace requester
 {
 
-using namespace std::chrono;
-
 class MockRequest : public RequestRetryTimer
 {
   public:
     MockRequest(int /*fd*/, mctp_eid_t /*eid*/, sdeventplus::Event& event,
                 pldm::Request&& /*requestMsg*/, uint8_t numRetries,
-                milliseconds responseTimeOut) :
+                std::chrono::milliseconds responseTimeOut) :
         RequestRetryTimer(event, numRetries, responseTimeOut)
     {}