diff --git a/src/libs/kata-sys-util/src/fs.rs b/src/libs/kata-sys-util/src/fs.rs
index 32bfafee9d..bec806c46c 100644
--- a/src/libs/kata-sys-util/src/fs.rs
+++ b/src/libs/kata-sys-util/src/fs.rs
@@ -145,7 +145,7 @@ pub fn reflink_copy<S: AsRef<Path>, D: AsRef<Path>>(src: S, dst: D) -> Result<()
 // Copy file using cp command, which handles sparse file copy.
 fn do_regular_copy(src: &str, dst: &str) -> Result<()> {
     let mut cmd = Command::new("/bin/cp");
-    cmd.args(&["--sparse=auto", src, dst]);
+    cmd.args(["--sparse=auto", src, dst]);
 
     match cmd.output() {
         Ok(output) => match output.status.success() {
diff --git a/src/libs/kata-sys-util/src/mount.rs b/src/libs/kata-sys-util/src/mount.rs
index 58613f3a72..efbcf6a4f5 100644
--- a/src/libs/kata-sys-util/src/mount.rs
+++ b/src/libs/kata-sys-util/src/mount.rs
@@ -820,11 +820,11 @@ mod tests {
         let tmpdir2 = tempfile::tempdir().unwrap();
 
         assert!(matches!(
-            bind_remount(&PathBuf::from(""), true),
+            bind_remount(PathBuf::from(""), true),
             Err(Error::NullMountPointPath)
         ));
         assert!(matches!(
-            bind_remount(&PathBuf::from("../______doesn't____exist____nnn"), true),
+            bind_remount(PathBuf::from("../______doesn't____exist____nnn"), true),
             Err(Error::InvalidPath(_))
         ));
 
@@ -1066,7 +1066,7 @@ mod tests {
         .unwrap_err();
 
         let src = path.join("src");
-        fs::write(&src, "test").unwrap();
+        fs::write(src, "test").unwrap();
         let dst = path.join("dst");
         fs::write(&dst, "test1").unwrap();
         mount_at(
diff --git a/src/libs/kata-sys-util/src/numa.rs b/src/libs/kata-sys-util/src/numa.rs
index ece5cd8e7f..4a6b2e5767 100644
--- a/src/libs/kata-sys-util/src/numa.rs
+++ b/src/libs/kata-sys-util/src/numa.rs
@@ -37,9 +37,9 @@ pub type Result<T> = std::result::Result<T, Error>;
 lazy_static! {
     static ref SYS_FS_PREFIX: PathBuf = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("test/texture");
     // numa node file for UT, we can mock data
-    static ref NUMA_NODE_PATH: PathBuf = (&*SYS_FS_PREFIX).join("sys/devices/system/node");
+    static ref NUMA_NODE_PATH: PathBuf = (*SYS_FS_PREFIX).join("sys/devices/system/node");
     // sysfs directory for CPU devices
-    static ref NUMA_CPU_PATH: PathBuf = (&*SYS_FS_PREFIX).join("sys/devices/system/cpu");
+    static ref NUMA_CPU_PATH: PathBuf = (*SYS_FS_PREFIX).join("sys/devices/system/cpu");
 }
 
 // global config in release