diff --git a/kclvm/tools/src/LSP/src/state.rs b/kclvm/tools/src/LSP/src/state.rs
index 36fa72db1..a3f51afcc 100644
--- a/kclvm/tools/src/LSP/src/state.rs
+++ b/kclvm/tools/src/LSP/src/state.rs
@@ -13,7 +13,6 @@ use lsp_types::{
 };
 use parking_lot::RwLock;
 use ra_ap_vfs::{FileId, Vfs};
-use ra_ap_vfs_notify::NotifyHandle;
 use std::collections::HashMap;
 use std::{sync::Arc, time::Instant};
 
@@ -103,7 +102,7 @@ impl LanguageServerState {
         let loader = {
             let (sender, _receiver) = unbounded::<ra_ap_vfs::loader::Message>();
             let handle: ra_ap_vfs_notify::NotifyHandle =
-            ra_ap_vfs::loader::Handle::spawn(Box::new(move |msg| sender.send(msg).unwrap()));
+                ra_ap_vfs::loader::Handle::spawn(Box::new(move |msg| sender.send(msg).unwrap()));
             let handle = Box::new(handle) as Box<dyn ra_ap_vfs::loader::Handle>;
             Handle { handle, _receiver }
         };
@@ -136,7 +135,7 @@ impl LanguageServerState {
             analysis: Analysis::default(),
             opened_files: IndexSet::new(),
             word_index_map,
-            loader
+            loader,
         }
     }
 
diff --git a/kclvm/tools/src/LSP/src/tests.rs b/kclvm/tools/src/LSP/src/tests.rs
index c2979ac11..e4ff5e745 100644
--- a/kclvm/tools/src/LSP/src/tests.rs
+++ b/kclvm/tools/src/LSP/src/tests.rs
@@ -582,6 +582,51 @@ fn notification_test() {
     }
 }
 
+#[test]
+fn close_file_test() {
+    let root = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    let mut path = root.clone();
+
+    path.push("src/test_data/diagnostics.k");
+
+    let path = path.to_str().unwrap();
+    let src = std::fs::read_to_string(path.clone()).unwrap();
+    let server = Project {}.server(InitializeParams::default());
+
+    // Mock open file
+    server.notification::<lsp_types::notification::DidOpenTextDocument>(
+        lsp_types::DidOpenTextDocumentParams {
+            text_document: TextDocumentItem {
+                uri: Url::from_file_path(path).unwrap(),
+                language_id: "KCL".to_string(),
+                version: 0,
+                text: src.clone(),
+            },
+        },
+    );
+
+    // Mock close file
+    server.notification::<lsp_types::notification::DidCloseTextDocument>(
+        lsp_types::DidCloseTextDocumentParams {
+            text_document: TextDocumentIdentifier {
+                uri: Url::from_file_path(path).unwrap(),
+            },
+        },
+    );
+
+    // Mock reopen file
+    server.notification::<lsp_types::notification::DidOpenTextDocument>(
+        lsp_types::DidOpenTextDocumentParams {
+            text_document: TextDocumentItem {
+                uri: Url::from_file_path(path).unwrap(),
+                language_id: "KCL".to_string(),
+                version: 0,
+                text: src,
+            },
+        },
+    );
+}
+
 #[test]
 fn goto_def_test() {
     let root = PathBuf::from(env!("CARGO_MANIFEST_DIR"));