diff --git a/Cargo.toml b/Cargo.toml
index 4c6307cf6..fc2c37c4f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -196,7 +196,6 @@ tsan = []
 
 [workspace.lints]
 rust.non_camel_case_types = "allow"
-rust.non_upper_case_globals = "allow"
 rust.unknown_lints = { level = "allow", priority = -1 }
 rust.unstable_name_collisions = "allow"
 rustdoc.private_intra_doc_links = "allow"
diff --git a/src/builtins/pwd.rs b/src/builtins/pwd.rs
index 8f0343334..83b2c07fb 100644
--- a/src/builtins/pwd.rs
+++ b/src/builtins/pwd.rs
@@ -5,8 +5,8 @@
 use crate::{builtins::error::Error, env::Environment as _, err_fmt, wutil::wrealpath};
 
 // The pwd builtin. Respect -P to resolve symbolic links. Respect -L to not do that (the default).
-const short_options: &wstr = L!("LPh");
-const long_options: &[WOption] = &[
+const SHORT_OPTIONS: &wstr = L!("LPh");
+const LONG_OPTIONS: &[WOption] = &[
     wopt(L!("help"), NoArgument, 'h'),
     wopt(L!("logical"), NoArgument, 'L'),
     wopt(L!("physical"), NoArgument, 'P'),
@@ -16,7 +16,7 @@ pub fn pwd(parser: &Parser, streams: &mut IoStreams, argv: &mut [&wstr]) -> Buil
     let cmd = argv[0];
     let argc = argv.len();
     let mut resolve_symlinks = false;
-    let mut w = WGetopter::new(short_options, long_options, argv);
+    let mut w = WGetopter::new(SHORT_OPTIONS, LONG_OPTIONS, argv);
     while let Some(opt) = w.next_opt() {
         match opt {
             'L' => resolve_symlinks = false,
diff --git a/src/builtins/realpath.rs b/src/builtins/realpath.rs
index 9dd10a4a3..a7f3f9fbf 100644
--- a/src/builtins/realpath.rs
+++ b/src/builtins/realpath.rs
@@ -16,8 +16,8 @@ struct Options {
     no_symlinks: bool,
 }
 
-const short_options: &wstr = L!("+hs");
-const long_options: &[WOption] = &[
+const SHORT_OPTIONS: &wstr = L!("+hs");
+const LONG_OPTIONS: &[WOption] = &[
     wopt(L!("no-symlinks"), NoArgument, 's'),
     wopt(L!("help"), NoArgument, 'h'),
 ];
@@ -31,7 +31,7 @@ fn parse_options(
 
     let mut opts = Options::default();
 
-    let mut w = WGetopter::new(short_options, long_options, args);
+    let mut w = WGetopter::new(SHORT_OPTIONS, LONG_OPTIONS, args);
 
     while let Some(c) = w.next_opt() {
         match c {
diff --git a/src/fork_exec/spawn.rs b/src/fork_exec/spawn.rs
index f1a5ed8af..834009569 100644
--- a/src/fork_exec/spawn.rs
+++ b/src/fork_exec/spawn.rs
@@ -5,7 +5,7 @@
 use crate::exec::{PgroupPolicy, is_thompson_shell_script};
 use crate::proc::Job;
 use crate::redirection::Dup2List;
-use crate::signal::signals_to_default;
+use crate::signal::SIGNALS_TO_DEFAULT;
 use errno::Errno;
 use libc::{c_char, posix_spawn_file_actions_t, posix_spawnattr_t};
 use std::ffi::{CStr, CString};
@@ -129,7 +129,7 @@ pub fn new(
         }
 
         // Everybody gets default handlers.
-        attr.set_sigdefault(&signals_to_default)?;
+        attr.set_sigdefault(&SIGNALS_TO_DEFAULT)?;
 
         // Reset the sigmask.
         let mut sigmask = MaybeUninit::uninit();
diff --git a/src/signal.rs b/src/signal.rs
index 43467874a..1de630469 100644
--- a/src/signal.rs
+++ b/src/signal.rs
@@ -273,7 +273,7 @@ pub fn signal_handle(sig: Signal) {
     sigaction(sig, &act, std::ptr::null_mut());
 }
 
-pub static signals_to_default: LazyLock<libc::sigset_t> = LazyLock::new(|| {
+pub static SIGNALS_TO_DEFAULT: LazyLock<libc::sigset_t> = LazyLock::new(|| {
     let mut set = MaybeUninit::uninit();
     unsafe { libc::sigemptyset(set.as_mut_ptr()) };
     for data in SIGNAL_TABLE.iter() {