diff --git a/.gitignore b/.gitignore
index b0e1363..ba28109 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 .vscode/
 test/
 .workspace/
+expand.rs
diff --git a/Cargo.lock b/Cargo.lock
index d5f1a70..8b9003b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -976,6 +976,41 @@ dependencies = [
  "minimal-lexical",
 ]
 
+[[package]]
+name = "num"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8536030f9fea7127f841b45bb6243b27255787fb4eb83958aa1ef9d2fdc0c36"
+dependencies = [
+ "num-bigint",
+ "num-complex",
+ "num-integer",
+ "num-iter",
+ "num-rational",
+ "num-traits",
+]
+
+[[package]]
+name = "num-bigint"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "090c7f9998ee0ff65aa5b723e4009f7b217707f1fb5ea551329cc4d6231fb304"
+dependencies = [
+ "autocfg",
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-complex"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6b19411a9719e753aff12e5187b74d60d3dc449ec3f4dc21e3989c3f554bc95"
+dependencies = [
+ "autocfg",
+ "num-traits",
+]
+
 [[package]]
 name = "num-integer"
 version = "0.1.45"
@@ -986,6 +1021,29 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "num-iter"
+version = "0.1.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d03e6c028c5dc5cac6e2dec0efda81fc887605bb3d884578bb6d6bf7514e252"
+dependencies = [
+ "autocfg",
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c000134b5dbf44adc5cb772486d335293351644b801551abe8f75c84cfa4aef"
+dependencies = [
+ "autocfg",
+ "num-bigint",
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.15"
@@ -1080,6 +1138,17 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "944553dd59c802559559161f9816429058b869003836120e262e8caec061b7ae"
 
+[[package]]
+name = "parse_duration"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7037e5e93e0172a5a96874380bf73bc6ecef022e26fa25f2be26864d6b3ba95d"
+dependencies = [
+ "lazy_static",
+ "num",
+ "regex",
+]
+
 [[package]]
 name = "peeking_take_while"
 version = "0.1.2"
@@ -1212,6 +1281,7 @@ dependencies = [
 name = "proc_macros"
 version = "0.0.1"
 dependencies = [
+ "parse_duration",
  "quote",
  "syn",
 ]
diff --git a/proc_macros/Cargo.toml b/proc_macros/Cargo.toml
index 68ca6f6..f70487c 100644
--- a/proc_macros/Cargo.toml
+++ b/proc_macros/Cargo.toml
@@ -11,5 +11,6 @@ path = "proc_macros.rs"
 proc-macro = true
 
 [dependencies]
+parse_duration = "2"
 quote = "1"
-syn = "1"
+syn = { version = "1", features = ["full"] }
diff --git a/proc_macros/proc_macros.rs b/proc_macros/proc_macros.rs
index 4fae577..50d25d0 100644
--- a/proc_macros/proc_macros.rs
+++ b/proc_macros/proc_macros.rs
@@ -1,3 +1,4 @@
+extern crate parse_duration;
 extern crate quote;
 extern crate syn;
 
@@ -5,6 +6,9 @@ use proc_macro::TokenStream;
 use quote::quote;
 use syn::parse_macro_input;
 use syn::Ident;
+use syn::ItemFn;
+use syn::LitInt;
+use syn::LitStr;
 
 #[proc_macro]
 pub fn define_struct_reader_fn(item: TokenStream) -> TokenStream {
@@ -79,3 +83,31 @@ pub fn impl_struct_writer_write(item: TokenStream) -> TokenStream {
     };
     stream.into()
 }
+
+#[proc_macro_attribute]
+pub fn async_timeout_test(attr: TokenStream, item: TokenStream) -> TokenStream {
+    let ItemFn {
+        attrs,
+        vis,
+        sig,
+        block,
+    } = parse_macro_input!(item as ItemFn);
+    let meta = parse_macro_input!(attr as LitStr);
+    let dura = parse_duration::parse(meta.value().as_str()).unwrap();
+    let secs = LitInt::new(format!("{}", dura.as_secs()).as_str(), sig.ident.span());
+    let nanos = LitInt::new(
+        format!("{}", dura.subsec_nanos()).as_str(),
+        sig.ident.span(),
+    );
+    let stmts = &block.stmts;
+    let stream = quote! {
+        #(#attrs)* #vis #sig {
+            let dura = std::time::Duration::new(#secs, #nanos);
+            let f = async {
+                #(#stmts)*
+            };
+            tokio::time::timeout(dura, f).await.unwrap();
+        }
+    };
+    stream.into()
+}
diff --git a/src/downloader/downloader.rs b/src/downloader/downloader.rs
index 1c934b8..96a909a 100644
--- a/src/downloader/downloader.rs
+++ b/src/downloader/downloader.rs
@@ -679,6 +679,7 @@ impl<T: Write + Seek + Send + Sync + ClearFile + GetTargetFileName> Drop for Dow
     }
 }
 
+#[proc_macros::async_timeout_test("100s")]
 #[tokio::test(flavor = "multi_thread", worker_threads = 4)]
 async fn test_downloader() {
     let p = Path::new("./test");
@@ -720,6 +721,7 @@ async fn test_downloader() {
     }
 }
 
+#[proc_macros::async_timeout_test("60s")]
 #[tokio::test(flavor = "multi_thread", worker_threads = 4)]
 async fn test_failed_downloader() {
     let p = Path::new("./test");
@@ -756,6 +758,7 @@ async fn test_failed_downloader() {
     }
 }
 
+#[proc_macros::async_timeout_test("60s")]
 #[tokio::test(flavor = "multi_thread", worker_threads = 4)]
 async fn test_downloader_dropped() {
     let p = Path::new("./test");