diff --git a/monoio/src/driver/uring/mod.rs b/monoio/src/driver/uring/mod.rs
index a2a06016..e170d12a 100644
--- a/monoio/src/driver/uring/mod.rs
+++ b/monoio/src/driver/uring/mod.rs
@@ -583,6 +583,8 @@ impl Drop for IoUringDriver {
 
 impl Drop for UringInner {
     fn drop(&mut self) {
+        // no need to wait for completion, as the kernel will clean up the ring asynchronically.
+        let _ = self.uring.submitter().submit();
         unsafe {
             ManuallyDrop::drop(&mut self.uring);
         }
diff --git a/monoio/tests/fs_file.rs b/monoio/tests/fs_file.rs
index 98b5b959..43cffb84 100644
--- a/monoio/tests/fs_file.rs
+++ b/monoio/tests/fs_file.rs
@@ -22,6 +22,7 @@ async fn read_hello(file: &File) {
 async fn basic_read() {
     let mut tempfile = tempfile();
     tempfile.write_all(HELLO).unwrap();
+    tempfile.as_file_mut().sync_data().unwrap();
 
     let file = File::open(tempfile.path()).await.unwrap();
     read_hello(&file).await;
@@ -31,6 +32,7 @@ async fn basic_read() {
 async fn basic_read_exact() {
     let mut tempfile = tempfile();
     tempfile.write_all(HELLO).unwrap();
+    tempfile.as_file_mut().sync_data().unwrap();
 
     let file = File::open(tempfile.path()).await.unwrap();
     let buf = Vec::with_capacity(HELLO.len());
@@ -49,6 +51,7 @@ async fn basic_write() {
 
     let file = File::create(tempfile.path()).await.unwrap();
     file.write_at(HELLO, 0).await.0.unwrap();
+    file.sync_all().await.unwrap();
 
     let file = std::fs::read(tempfile.path()).unwrap();
     assert_eq!(file, HELLO);
@@ -60,6 +63,7 @@ async fn basic_write_all() {
 
     let file = File::create(tempfile.path()).await.unwrap();
     file.write_all_at(HELLO, 0).await.0.unwrap();
+    file.sync_all().await.unwrap();
 
     let file = std::fs::read(tempfile.path()).unwrap();
     assert_eq!(file, HELLO);
@@ -69,6 +73,7 @@ async fn basic_write_all() {
 async fn cancel_read() {
     let mut tempfile = tempfile();
     tempfile.write_all(HELLO).unwrap();
+    tempfile.as_file_mut().sync_data().unwrap();
 
     let file = File::open(tempfile.path()).await.unwrap();
 
@@ -82,6 +87,7 @@ async fn cancel_read() {
 async fn explicit_close() {
     let mut tempfile = tempfile();
     tempfile.write_all(HELLO).unwrap();
+    tempfile.as_file_mut().sync_data().unwrap();
 
     let file = File::open(tempfile.path()).await.unwrap();
     #[cfg(unix)]
@@ -91,7 +97,7 @@ async fn explicit_close() {
 
     file.close().await.unwrap();
 
-    assert_invalid_fd(fd);
+    assert_invalid_fd(fd, tempfile.as_file().metadata().unwrap());
 }
 
 #[monoio::test_all]
@@ -101,6 +107,7 @@ async fn drop_open() {
     // Do something else
     let file_w = File::create(tempfile.path()).await.unwrap();
     file_w.write_at(HELLO, 0).await.0.unwrap();
+    file_w.sync_all().await.unwrap();
 
     let file = std::fs::read(tempfile.path()).unwrap();
     assert_eq!(file, HELLO);
@@ -125,7 +132,7 @@ fn drop_off_runtime() {
     let fd = file.as_raw_handle();
     drop(file);
 
-    assert_invalid_fd(fd);
+    assert_invalid_fd(fd, tempfile.as_file().metadata().unwrap());
 }
 
 #[monoio::test_all]
@@ -158,13 +165,29 @@ async fn poll_once(future: impl std::future::Future) {
     .await;
 }
 
-fn assert_invalid_fd(fd: RawFd) {
+fn assert_invalid_fd(fd: RawFd, base: std::fs::Metadata) {
     use std::fs::File;
     #[cfg(unix)]
-    let mut f = unsafe { File::from_raw_fd(fd) };
+    let f = unsafe { File::from_raw_fd(fd) };
     #[cfg(windows)]
-    let mut f = unsafe { File::from_raw_handle(fd) };
-    let mut buf = vec![];
-
-    assert!(f.read_to_end(&mut buf).is_err());
+    let f = unsafe { File::from_raw_handle(fd) };
+
+    let meta = f.metadata();
+    std::mem::forget(f);
+
+    if let Ok(meta) = meta {
+        if !meta.is_file() {
+            return;
+        }
+
+        #[cfg(unix)]
+        {
+            use std::os::unix::fs::MetadataExt;
+            let inode = meta.ino();
+            let actual = base.ino();
+            if inode == actual {
+                panic!();
+            }
+        }
+    }
 }