diff --git a/test/system-tests/request_handler.cpp b/test/system-tests/request_handler.cpp
index 67e662ef..7ae7a0be 100644
--- a/test/system-tests/request_handler.cpp
+++ b/test/system-tests/request_handler.cpp
@@ -238,7 +238,7 @@ void RequestHandler::on_extract_headers(const httplib::Request& req,
   }
 
   const auto response_body = nlohmann::json{
-      {"span_id", span->id()},
+      {"span_id", span->parent_id()},
   };
 
   res.set_content(response_body.dump(), "application/json");