diff --git a/include/cinatra/coro_io/coro_file.hpp b/include/cinatra/coro_io/coro_file.hpp
index bc99134a..a6cd3cde 100644
--- a/include/cinatra/coro_io/coro_file.hpp
+++ b/include/cinatra/coro_io/coro_file.hpp
@@ -96,11 +96,16 @@ class coro_file {
   }
 #endif
 
-  bool is_open() {
+  bool is_open() { return stream_file_ && stream_file_->is_open(); }
+
+  void flush() {
 #if defined(ENABLE_FILE_IO_URING)
-    return stream_file_ && stream_file_->is_open();
+
 #else
-    return stream_file_ && stream_file_->is_open();
+    if (stream_file_) {
+      stream_file_->flush();
+      stream_file_->sync();
+    }
 #endif
   }
 
@@ -215,7 +220,6 @@ class coro_file {
             promise.setValue(std::make_error_code(std::errc::io_error));
           }
         });
-
     co_return co_await promise.getFuture();
   }
 
@@ -234,7 +238,6 @@ class coro_file {
   async_simple::coro::Lazy<std::error_code> async_write_impl(const char* data,
                                                              size_t size) {
     stream_file_->write(data, size);
-    stream_file_->flush();
     co_return std::error_code{};
   }
 #endif
@@ -250,4 +253,4 @@ class coro_file {
 
   std::atomic<bool> eof_ = false;
 };
-}  // namespace coro_io
\ No newline at end of file
+}  // namespace coro_io
diff --git a/tests/test_corofile.cpp b/tests/test_corofile.cpp
index fc3ab63d..a1650f7d 100644
--- a/tests/test_corofile.cpp
+++ b/tests/test_corofile.cpp
@@ -434,6 +434,8 @@ TEST_CASE("small_file_write_test") {
     std::cout << ec.message() << "\n";
   }
 
+  file.flush();
+
   std::ifstream is(filename, std::ios::binary);
   if (!is.is_open()) {
     std::cout << "Failed to open file: " << filename << "\n";
@@ -456,6 +458,7 @@ TEST_CASE("small_file_write_test") {
   if (ec) {
     std::cout << ec.message() << "\n";
   }
+  file.flush();
   is.open(filename, std::ios::binary);
   if (!is.is_open()) {
     std::cout << "Failed to open file: " << filename << "\n";
@@ -507,6 +510,7 @@ TEST_CASE("large_file_write_test") {
       std::cout << ec.message() << "\n";
     }
   }
+  file.flush();
   CHECK(fs::file_size(filename) == file_size);
   std::ifstream is(filename, std::ios::binary);
   if (!is.is_open()) {
@@ -551,7 +555,7 @@ TEST_CASE("empty_file_write_test") {
   if (ec) {
     std::cout << ec.message() << "\n";
   }
-
+  file.flush();
   std::ifstream is(filename, std::ios::binary);
   if (!is.is_open()) {
     std::cout << "Failed to open file: " << filename << "\n";
@@ -586,6 +590,7 @@ TEST_CASE("small_file_write_with_pool_test") {
   if (ec) {
     std::cout << ec.message() << "\n";
   }
+  file.flush();
 
   std::ifstream is(filename, std::ios::binary);
   if (!is.is_open()) {
@@ -609,6 +614,7 @@ TEST_CASE("small_file_write_with_pool_test") {
   if (ec) {
     std::cout << ec.message() << "\n";
   }
+  file.flush();
   is.open(filename, std::ios::binary);
   if (!is.is_open()) {
     std::cout << "Failed to open file: " << filename << "\n";
@@ -659,7 +665,9 @@ TEST_CASE("large_file_write_with_pool_test") {
       std::cout << ec.message() << "\n";
     }
   }
-  CHECK(fs::file_size(filename) == file_size);
+  file.flush();
+  size_t sz = fs::file_size(filename);
+  CHECK(sz == file_size);
   std::ifstream is(filename, std::ios::binary);
   if (!is.is_open()) {
     std::cout << "Failed to open file: " << filename << "\n";