diff --git a/tests/test_async.cpp b/tests/test_async.cpp
index 2d86dafd..ce1d6ed8 100644
--- a/tests/test_async.cpp
+++ b/tests/test_async.cpp
@@ -103,30 +103,42 @@ TEST_CASE("multi threads", "[async]")
 
 TEST_CASE("to_file", "[async]")
 {
-    prepare_logdir();
-    size_t queue_size = 512;
-    size_t messages = 512;
-    size_t n_threads = 4;
-    spdlog::init_thread_pool(queue_size, n_threads);
-    auto logger = spdlog::basic_logger_mt<spdlog::create_async>("as", "logs/async_test.log", true);
+	prepare_logdir();	
+	size_t messages = 1024;
+	size_t tp_threads = 1;
+	std::string filename = "logs/async_test.log";
+	{
+		auto file_sink = std::make_shared<spdlog::sinks::simple_file_sink_mt>(filename, true);
+		auto tp = std::make_shared<spdlog::details::thread_pool>(messages, tp_threads);
+		auto logger = std::make_shared<spdlog::async_logger>("as", std::move(file_sink), std::move(tp)); 
 
-    std::vector<std::thread> threads;
-    for (size_t i = 0; i < n_threads; i++)
-    {
-        threads.emplace_back([logger, messages] {
-            for (size_t j = 0; j < messages; j++)
-            {
-                logger->info("Hello message #{}", j);
-            }
-        });
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-    logger.reset();
-    spdlog::drop("as");
-    std::this_thread::sleep_for(std::chrono::seconds(1));
-    REQUIRE(count_lines("logs/async_test.log") == messages * n_threads);
+		for (size_t j = 0; j < messages; j++)
+		{
+			logger->info("Hello message #{}", j);
+		}
+	}
+	
+	REQUIRE(count_lines(filename) == messages);
+	auto contents = file_contents(filename); 
+	REQUIRE(ends_with (contents, std::string("Hello message #1023") + SPDLOG_EOL));
+}
+
+TEST_CASE("to_file multi-workers", "[async]")
+{
+	prepare_logdir();	
+	size_t messages = 1024*10;
+	size_t tp_threads = 10;
+	std::string filename = "logs/async_test.log";
+	{
+		auto file_sink = std::make_shared<spdlog::sinks::simple_file_sink_mt>(filename, true);
+		auto tp = std::make_shared<spdlog::details::thread_pool>(messages, tp_threads);
+		auto logger = std::make_shared<spdlog::async_logger>("as", std::move(file_sink), std::move(tp)); 
+
+		for (size_t j = 0; j < messages; j++)
+		{
+			logger->info("Hello message #{}", j);
+		}
+	}
+	
+	REQUIRE(count_lines(filename) == messages);	
 }