diff --git a/src/bin/bios.rs b/src/bin/bios.rs
index 8f2eaedf..153f339a 100644
--- a/src/bin/bios.rs
+++ b/src/bin/bios.rs
@@ -1,6 +1,3 @@
-#![feature(lang_items)]
-#![feature(global_asm)]
-#![feature(asm)]
 #![no_std]
 #![no_main]
 
diff --git a/src/bin/uefi.rs b/src/bin/uefi.rs
index dc5223f6..d81ebfd2 100644
--- a/src/bin/uefi.rs
+++ b/src/bin/uefi.rs
@@ -1,7 +1,6 @@
 #![no_std]
 #![no_main]
 #![feature(abi_efiapi)]
-#![feature(asm)]
 #![feature(maybe_uninit_extra)]
 #![deny(unsafe_op_in_unsafe_fn)]
 
diff --git a/src/lib.rs b/src/lib.rs
index ba237106..d30fb4cc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -66,7 +66,6 @@ for all possible configuration options.
 */
 
 #![cfg_attr(not(feature = "builder"), no_std)]
-#![feature(asm)]
 #![feature(maybe_uninit_extra)]
 #![feature(maybe_uninit_slice)]
 #![deny(unsafe_op_in_unsafe_fn)]
diff --git a/tests/runner/src/main.rs b/tests/runner/src/main.rs
index a083ce15..cdad97b8 100644
--- a/tests/runner/src/main.rs
+++ b/tests/runner/src/main.rs
@@ -1,7 +1,7 @@
 use std::{
     io::Write,
     path::{Path, PathBuf},
-    process::{Command, Stdio},
+    process::Command,
 };
 
 const QEMU_ARGS: &[&str] = &[