diff --git a/test/cmake_install_test/main.cpp b/test/cmake_install_test/main.cpp
index 8089642..c9a6cf2 100644
--- a/test/cmake_install_test/main.cpp
+++ b/test/cmake_install_test/main.cpp
@@ -1,20 +1,17 @@
-// Copyright (c) 2023 Klemens D. Morgenstern
+// Copyright (c) 2022 Klemens D. Morgenstern
 //
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
+#include <boost/cobalt.hpp>
 #include <boost/cobalt/main.hpp>
-#include <boost/cobalt/op.hpp>
 #include <boost/asio/steady_timer.hpp>
 
-using namespace boost;
 
-// tag::timer_example[]
-cobalt::main co_main(int argc, char * argv[]) // <1>
+boost::cobalt::main co_main(int argc, char *argv[])
 {
-  asio::steady_timer tim{co_await asio::this_coro::executor, // <2>
-                         std::chrono::milliseconds(std::stoi(argv[1]))}; // <3>
-  co_await tim.async_wait(cobalt::use_op); // <4>
-  co_return 0; // <5>
+  boost::asio::steady_timer tim{co_await boost::asio::this_coro::executor, std::chrono::milliseconds(50)};
+  co_await tim.async_wait(boost::cobalt::use_op);
+
+  co_return 0;
 }
-// end::timer_example[]
diff --git a/test/cmake_subdir_test/main.cpp b/test/cmake_subdir_test/main.cpp
index 8089642..c9a6cf2 100644
--- a/test/cmake_subdir_test/main.cpp
+++ b/test/cmake_subdir_test/main.cpp
@@ -1,20 +1,17 @@
-// Copyright (c) 2023 Klemens D. Morgenstern
+// Copyright (c) 2022 Klemens D. Morgenstern
 //
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
+#include <boost/cobalt.hpp>
 #include <boost/cobalt/main.hpp>
-#include <boost/cobalt/op.hpp>
 #include <boost/asio/steady_timer.hpp>
 
-using namespace boost;
 
-// tag::timer_example[]
-cobalt::main co_main(int argc, char * argv[]) // <1>
+boost::cobalt::main co_main(int argc, char *argv[])
 {
-  asio::steady_timer tim{co_await asio::this_coro::executor, // <2>
-                         std::chrono::milliseconds(std::stoi(argv[1]))}; // <3>
-  co_await tim.async_wait(cobalt::use_op); // <4>
-  co_return 0; // <5>
+  boost::asio::steady_timer tim{co_await boost::asio::this_coro::executor, std::chrono::milliseconds(50)};
+  co_await tim.async_wait(boost::cobalt::use_op);
+
+  co_return 0;
 }
-// end::timer_example[]