diff --git a/vmm/src/config.rs b/vmm/src/config.rs
index f2476da84..fa89555b0 100644
--- a/vmm/src/config.rs
+++ b/vmm/src/config.rs
@@ -2138,8 +2138,6 @@ impl VmConfig {
 
 #[cfg(test)]
 mod tests {
-    use std::{fs::File, os::fd::AsRawFd};
-
     use super::*;
     use net_util::MacAddr;
 
@@ -2353,6 +2351,17 @@ mod tests {
         Ok(())
     }
 
+    fn memfd_create(name: &std::ffi::CStr, flags: u32) -> std::result::Result<i32, std::io::Error> {
+        // SAFETY: FFI call with correct arguments
+        let res = unsafe { libc::syscall(libc::SYS_memfd_create, name.as_ptr(), flags) };
+
+        if res < 0 {
+            Err(std::io::Error::last_os_error())
+        } else {
+            Ok(res as i32)
+        }
+    }
+
     #[test]
     fn test_net_parsing() -> Result<()> {
         // mac address is random
@@ -2431,10 +2440,10 @@ mod tests {
             }
         );
 
-        // SAFETY: Safe as the file was just opened
-        let fd1 = unsafe { libc::dup(File::open("/dev/null").unwrap().as_raw_fd()) };
-        // SAFETY: Safe as the file was just opened
-        let fd2 = unsafe { libc::dup(File::open("/dev/null").unwrap().as_raw_fd()) };
+        let fd1 =
+            memfd_create(&std::ffi::CString::new("test_net_parsing_fd1").unwrap(), 0).unwrap();
+        let fd2 =
+            memfd_create(&std::ffi::CString::new("test_net_parsing_fd2").unwrap(), 0).unwrap();
 
         assert_eq!(
             &format!(