diff --git a/clash_lib/build.rs b/clash_lib/build.rs
index 3194ade1d..aa8dfbf64 100644
--- a/clash_lib/build.rs
+++ b/clash_lib/build.rs
@@ -1,5 +1,5 @@
-fn main(){
+fn main() {
     if std::env::var("CLASH_RS_CI").is_ok() {
         println!("cargo:rustc-cfg=ci");
     }
-}
\ No newline at end of file
+}
diff --git a/clash_lib/src/proxy/utils/test_utils/docker_runner.rs b/clash_lib/src/proxy/utils/test_utils/docker_runner.rs
index e24920301..0f78316a3 100644
--- a/clash_lib/src/proxy/utils/test_utils/docker_runner.rs
+++ b/clash_lib/src/proxy/utils/test_utils/docker_runner.rs
@@ -1,5 +1,3 @@
-//! This example will run a non-interactive command inside the container using `docker exec`
-
 use std::collections::HashMap;
 
 use bollard::container::{Config, RemoveContainerOptions};
@@ -11,6 +9,8 @@ use bollard::image::CreateImageOptions;
 use anyhow::Result;
 use futures::{Future, TryStreamExt};
 
+const TIMEOUT_DURATION: u64 = 3;
+
 pub struct DockerTestRunner {
     instance: Docker,
     id: String,
@@ -51,7 +51,7 @@ impl DockerTestRunner {
             res = fut => {
                 res
             },
-            _ = tokio::time::sleep(std::time::Duration::from_secs(3))=> {
+            _ = tokio::time::sleep(std::time::Duration::from_secs(TIMEOUT_DURATION))=> {
                 tracing::warn!("timeout");
                 Ok(())
             }