diff --git a/include/fast_io_hosted/process/process/posix.h b/include/fast_io_hosted/process/process/posix.h
index c6919263..0f4046b0 100644
--- a/include/fast_io_hosted/process/process/posix.h
+++ b/include/fast_io_hosted/process/process/posix.h
@@ -123,7 +123,7 @@ inline posix_wait_status posix_waitpid(pid_t pid)
 #if defined(__linux__) && defined(__NR_wait4)
 	system_call_throw_error(system_call<__NR_wait4, int>(pid, __builtin_addressof(status.wait_loc), 0, nullptr));
 #else
-	if (::fast_io::posix::libc_waitpid(pid, __builtin_addressof(status.wait_loc), 0) == -1)
+	if (::fast_io::posix::libc_waitpid(pid, __builtin_addressof(status.wait_loc), 0) == -1) [[unlikely]]
 	{
 		throw_posix_error();
 	}
diff --git a/tests/0000.tests_prebuild/gentests.cc b/tests/0000.tests_prebuild/gentests.cc
index 6ccf5a29..283278ae 100644
--- a/tests/0000.tests_prebuild/gentests.cc
+++ b/tests/0000.tests_prebuild/gentests.cc
@@ -281,7 +281,7 @@ inline void parse_prop_files(fast_io::native_file_loader &&file, file_property_t
 	}
 }
 
-inline bool gen_cmake_file(fast_io::native_io_observer nio, std::u8string_view prefix, file_entry_t prop);
+inline bool gen_cmake_file(fast_io::native_io_observer nio, std::u8string_view prefix, file_entry_t prop, bool test);
 
 inline void cmake_gen_rec_dir_def(fast_io::u8obuf_file &cmake_file, fast_io::native_io_observer nio, std::u8string_view filename, std::u8string_view prefix, file_entry_t const &prop)
 {
@@ -298,7 +298,7 @@ inline void cmake_gen_rec_dir_def(fast_io::u8obuf_file &cmake_file, fast_io::nat
 	print(cmake_file, u8"include(${CMAKE_CURRENT_LIST_DIR}/", filename, u8"/CMakeLists.txt)\n");
 }
 
-inline void cmake_gen_file_def(fast_io::u8obuf_file &cmake_file, std::u8string_view targetname, auto &&filename, file_entry_t const &prop)
+inline void cmake_gen_file_def(fast_io::u8obuf_file &cmake_file, std::u8string_view targetname, auto &&filename, file_entry_t const &prop, bool test)
 {
 	if (prop.ignore || prop.will_fail == will_fail_t::compiletime)
 	{
@@ -328,13 +328,16 @@ inline void cmake_gen_file_def(fast_io::u8obuf_file &cmake_file, std::u8string_v
 			print(cmake_file, u8"set_target_properties(", targetname, u8" PROPERTIES CMAKE_CXX_FLAGS \"${CMAKE_CXX_FLAGS} -fsanitize=address\")\n");
 		}
 	}
-	print(cmake_file, u8"add_test(", targetname, u8" ", targetname, u8")\n");
+	if (test)
+	{
+		print(cmake_file, u8"add_test(", targetname, u8" ", targetname, u8")\n");
+	}
 	// // set_tests_properties does not work. why?
 	// if (prop.will_fail == will_fail_t::runtime)
 	// 	print(cmake_file, u8"set_tests_properties(", targetname, u8" PROPERTIES WILL_FAIL TRUE)\n");
 }
 
-inline bool gen_cmake_file(fast_io::native_io_observer nio, std::u8string_view prefix, file_entry_t prop)
+inline bool gen_cmake_file(fast_io::native_io_observer nio, std::u8string_view prefix, file_entry_t prop, bool test)
 {
 	bool generated{};
 	fast_io::u8obuf_file cmake_file;
@@ -382,7 +385,7 @@ inline bool gen_cmake_file(fast_io::native_io_observer nio, std::u8string_view p
 			std::u8string_view ext{u8extension(entry)};
 			if (ext == u8".cpp" || ext == u8".cc")
 			{
-				cmake_gen_file_def(cmake_file, fast_io::u8concat_std(prefix, u8stem(entry)), filename, curr_prop);
+				cmake_gen_file_def(cmake_file, fast_io::u8concat_std(prefix, u8stem(entry)), filename, curr_prop, test);
 				generated = true;
 			}
 			break;
@@ -439,7 +442,7 @@ int main(int argc, char *argv[])
 	fast_io::dir_file tests_dir{R"(./tests)"};
 	fast_io::dir_file examples_dir{R"(./examples)"};
 	fast_io::dir_file benchmark_dir{R"(./benchmark)"};
-	gen_cmake_file(tests_dir, u8"tests.", {});
-	gen_cmake_file(examples_dir, u8"examples.", {});
-	gen_cmake_file(benchmark_dir, u8"benchmark.", {});
+	gen_cmake_file(tests_dir, u8"tests.", {}, true);
+	gen_cmake_file(examples_dir, u8"examples.", {}, true);
+	gen_cmake_file(benchmark_dir, u8"benchmark.", {}, false);
 }