diff --git a/arch/src/x86_64/mod.rs b/arch/src/x86_64/mod.rs
index c39870070..8d1b30643 100644
--- a/arch/src/x86_64/mod.rs
+++ b/arch/src/x86_64/mod.rs
@@ -974,7 +974,7 @@ mod tests {
 
     #[test]
     fn regions_lt_4gb() {
-        let regions = arch_memory_regions(1 << 29 as GuestUsize);
+        let regions = arch_memory_regions(1 << 29);
         assert_eq!(3, regions.len());
         assert_eq!(GuestAddress(0), regions[0].0);
         assert_eq!(1usize << 29, regions[0].1);
@@ -982,7 +982,7 @@ mod tests {
 
     #[test]
     fn regions_gt_4gb() {
-        let regions = arch_memory_regions((1 << 32 as GuestUsize) + 0x8000);
+        let regions = arch_memory_regions((1 << 32) + 0x8000);
         assert_eq!(4, regions.len());
         assert_eq!(GuestAddress(0), regions[0].0);
         assert_eq!(GuestAddress(1 << 32), regions[1].0);
diff --git a/devices/src/ioapic.rs b/devices/src/ioapic.rs
index 771eab251..89d8a0bda 100644
--- a/devices/src/ioapic.rs
+++ b/devices/src/ioapic.rs
@@ -193,7 +193,7 @@ impl Ioapic {
     ) -> Result<Ioapic> {
         let interrupt_source_group = interrupt_manager
             .create_group(MsiIrqGroupConfig {
-                base: 0 as InterruptIndex,
+                base: 0,
                 count: NUM_IOAPIC_PINS as InterruptIndex,
             })
             .map_err(Error::CreateInterruptSourceGroup)?;
diff --git a/devices/src/legacy/serial.rs b/devices/src/legacy/serial.rs
index 85caaf6fa..945101cd3 100644
--- a/devices/src/legacy/serial.rs
+++ b/devices/src/legacy/serial.rs
@@ -474,13 +474,13 @@ mod tests {
             Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
         );
 
-        serial.write(0, LCR as u64, &[LCR_DLAB_BIT as u8]);
-        serial.write(0, DLAB_LOW as u64, &[0x12 as u8]);
-        serial.write(0, DLAB_HIGH as u64, &[0x34 as u8]);
+        serial.write(0, LCR as u64, &[LCR_DLAB_BIT]);
+        serial.write(0, DLAB_LOW as u64, &[0x12]);
+        serial.write(0, DLAB_HIGH as u64, &[0x34]);
 
         let mut data = [0u8];
         serial.read(0, LCR as u64, &mut data[..]);
-        assert_eq!(data[0], LCR_DLAB_BIT as u8);
+        assert_eq!(data[0], LCR_DLAB_BIT);
         serial.read(0, DLAB_LOW as u64, &mut data[..]);
         assert_eq!(data[0], 0x12);
         serial.read(0, DLAB_HIGH as u64, &mut data[..]);
@@ -495,16 +495,16 @@ mod tests {
             Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
         );
 
-        serial.write(0, MCR as u64, &[MCR_LOOP_BIT as u8]);
+        serial.write(0, MCR as u64, &[MCR_LOOP_BIT]);
         serial.write(0, DATA as u64, &[b'a']);
         serial.write(0, DATA as u64, &[b'b']);
         serial.write(0, DATA as u64, &[b'c']);
 
         let mut data = [0u8];
         serial.read(0, MSR as u64, &mut data[..]);
-        assert_eq!(data[0], DEFAULT_MODEM_STATUS as u8);
+        assert_eq!(data[0], DEFAULT_MODEM_STATUS);
         serial.read(0, MCR as u64, &mut data[..]);
-        assert_eq!(data[0], MCR_LOOP_BIT as u8);
+        assert_eq!(data[0], MCR_LOOP_BIT);
         serial.read(0, DATA as u64, &mut data[..]);
         assert_eq!(data[0], b'a');
         serial.read(0, DATA as u64, &mut data[..]);
@@ -521,10 +521,10 @@ mod tests {
             Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
         );
 
-        serial.write(0, SCR as u64, &[0x12 as u8]);
+        serial.write(0, SCR as u64, &[0x12]);
 
         let mut data = [0u8];
         serial.read(0, SCR as u64, &mut data[..]);
-        assert_eq!(data[0], 0x12 as u8);
+        assert_eq!(data[0], 0x12);
     }
 }
diff --git a/hypervisor/src/arch/x86/emulator/instructions/mov.rs b/hypervisor/src/arch/x86/emulator/instructions/mov.rs
index 9657d05c2..2aebe6253 100644
--- a/hypervisor/src/arch/x86/emulator/instructions/mov.rs
+++ b/hypervisor/src/arch/x86/emulator/instructions/mov.rs
@@ -508,7 +508,7 @@ mod tests {
         // Only run the first instruction.
         assert!(vmm.emulate_first_insn(cpu_id, &insn).is_ok());
 
-        assert_eq!(ip + 7 as u64, vmm.cpu_state(cpu_id).unwrap().ip());
+        assert_eq!(ip + 7, vmm.cpu_state(cpu_id).unwrap().ip());
 
         let new_rax: u64 = vmm
             .cpu_state(cpu_id)
@@ -541,7 +541,7 @@ mod tests {
         // Run the 2 first instructions.
         assert!(vmm.emulate_insn(cpu_id, &insn, Some(2)).is_ok());
 
-        assert_eq!(ip + 7 + 4 as u64, vmm.cpu_state(cpu_id).unwrap().ip());
+        assert_eq!(ip + 7 + 4, vmm.cpu_state(cpu_id).unwrap().ip());
 
         let rbx: u64 = vmm
             .cpu_state(cpu_id)
diff --git a/hypervisor/src/mshv/mod.rs b/hypervisor/src/mshv/mod.rs
index d802a63fc..8a8f9e80a 100644
--- a/hypervisor/src/mshv/mod.rs
+++ b/hypervisor/src/mshv/mod.rs
@@ -307,7 +307,7 @@ impl hypervisor::Hypervisor for MshvHypervisor {
     /// Get the supported CpuID
     ///
     fn get_cpuid(&self) -> hypervisor::Result<CpuId> {
-        Ok(CpuId::new(1 as usize))
+        Ok(CpuId::new(1))
     }
     #[cfg(target_arch = "x86_64")]
     ///
@@ -601,7 +601,7 @@ impl cpu::Vcpu for MshvVcpu {
                 }
                 hv_message_type_HVMSG_X64_MSR_INTERCEPT => {
                     let info = x.to_msr_info().unwrap();
-                    if info.header.intercept_access_type == 0 as u8 {
+                    if info.header.intercept_access_type == 0 {
                         debug!("msr read: {:x}", info.msr_number);
                     } else {
                         debug!("msr write: {:x}", info.msr_number);
@@ -935,7 +935,7 @@ impl vm::Vm for MshvVm {
         let vcpu = MshvVcpu {
             fd: vcpu_fd,
             vp_index: id,
-            cpuid: CpuId::new(1 as usize),
+            cpuid: CpuId::new(1),
             msrs: self.msrs.clone(),
             ioeventfds: self.ioeventfds.clone(),
             gsi_routes: self.gsi_routes.clone(),
diff --git a/virtio-devices/src/vhost_user/fs.rs b/virtio-devices/src/vhost_user/fs.rs
index 23f77d851..99bfc1a3e 100644
--- a/virtio-devices/src/vhost_user/fs.rs
+++ b/virtio-devices/src/vhost_user/fs.rs
@@ -128,7 +128,7 @@ impl VhostUserMasterReqHandler for SlaveReqHandler {
                     libc::PROT_NONE,
                     libc::MAP_ANONYMOUS | libc::MAP_PRIVATE | libc::MAP_FIXED,
                     -1,
-                    0 as libc::off_t,
+                    0,
                 )
             };
             if ret == libc::MAP_FAILED {
diff --git a/vm-virtio/src/queue.rs b/vm-virtio/src/queue.rs
index f97cd74c7..6508d2c31 100644
--- a/vm-virtio/src/queue.rs
+++ b/vm-virtio/src/queue.rs
@@ -1051,7 +1051,7 @@ pub mod tests {
         assert!(c.is_indirect());
 
         // create an indirect table with 4 chained descriptors
-        let mut indirect_table = Vec::with_capacity(4 as usize);
+        let mut indirect_table = Vec::with_capacity(4);
         for j in 0..4 {
             let desc = VirtqDesc::new(GuestAddress(0x1000 + (j * 16)), m);
             desc.set(0x1000, 0x1000, VIRTQ_DESC_F_NEXT, (j + 1) as u16);
diff --git a/vmm/src/memory_manager.rs b/vmm/src/memory_manager.rs
index 5f4b6462d..1f8b77e87 100644
--- a/vmm/src/memory_manager.rs
+++ b/vmm/src/memory_manager.rs
@@ -699,7 +699,7 @@ impl MemoryManager {
                 },
                 #[cfg(target_arch = "x86_64")]
                 {
-                    1 << 16 as GuestUsize
+                    1 << 16
                 },
                 GuestAddress(0),
                 mmio_address_space_size,
@@ -1370,7 +1370,7 @@ impl MemoryManager {
                     prot,
                     flags,
                     file.as_raw_fd(),
-                    0 as libc::off_t,
+                    0,
                 )
             } as u64;