diff --git a/arch/src/x86_64/mod.rs b/arch/src/x86_64/mod.rs
index ba9c131bc..c39870070 100644
--- a/arch/src/x86_64/mod.rs
+++ b/arch/src/x86_64/mod.rs
@@ -991,7 +991,7 @@ mod tests {
     #[test]
     fn test_system_configuration() {
         let no_vcpus = 4;
-        let gm = GuestMemoryMmap::from_ranges(&vec![(GuestAddress(0), 0x10000)]).unwrap();
+        let gm = GuestMemoryMmap::from_ranges(&[(GuestAddress(0), 0x10000)]).unwrap();
         let config_err = configure_system(
             &gm,
             GuestAddress(0),
diff --git a/arch/src/x86_64/regs.rs b/arch/src/x86_64/regs.rs
index 0d2543306..344fa5481 100644
--- a/arch/src/x86_64/regs.rs
+++ b/arch/src/x86_64/regs.rs
@@ -264,7 +264,7 @@ mod tests {
     use vm_memory::{GuestAddress, GuestMemoryMmap};
 
     fn create_guest_mem() -> GuestMemoryMmap {
-        GuestMemoryMmap::from_ranges(&vec![(GuestAddress(0), 0x10000)]).unwrap()
+        GuestMemoryMmap::from_ranges(&[(GuestAddress(0), 0x10000)]).unwrap()
     }
 
     fn read_u64(gm: &GuestMemoryMmap, offset: GuestAddress) -> u64 {