diff --git a/cli/src/main.rs b/cli/src/main.rs
index 0a2b94ebc..eaa429c70 100644
--- a/cli/src/main.rs
+++ b/cli/src/main.rs
@@ -2,7 +2,7 @@ use std::cell::{RefCell, RefMut};
 use std::collections::HashMap;
 use std::fs::{self, File};
 use std::hash::Hash;
-use std::io::{self, Read, Write};
+use std::io::{self, Write};
 use std::path::{Path, PathBuf};
 use std::process;
 
@@ -559,11 +559,8 @@ impl PathHash {
 /// Read a file.
 fn read(path: &Path) -> FileResult<Vec<u8>> {
     let f = |e| FileError::from_io(e, path);
-    let mut file = File::open(path).map_err(f)?;
-    if file.metadata().map_err(f)?.is_file() {
-        let mut data = vec![];
-        file.read_to_end(&mut data).map_err(f)?;
-        Ok(data)
+    if fs::metadata(&path).map_err(f)?.is_file() {
+        fs::read(&path).map_err(f)
     } else {
         Err(FileError::IsDirectory)
     }
diff --git a/docs/src/general/changelog.md b/docs/src/general/changelog.md
index ab12344e6..45de2dd69 100644
--- a/docs/src/general/changelog.md
+++ b/docs/src/general/changelog.md
@@ -5,6 +5,9 @@ description: |
 ---
 
 # Changelog
+## Unreleased
+- Reduced maximum function call depth from 256 to 64.
+
 ## March 28, 2023
 - **Breaking:** Enumerations now require a space after their marker, that is,
   `[1.ok]` must now be written as `[1. ok]`
diff --git a/src/eval/mod.rs b/src/eval/mod.rs
index 8790bc189..e278d787b 100644
--- a/src/eval/mod.rs
+++ b/src/eval/mod.rs
@@ -60,7 +60,7 @@ use crate::util::PathExt;
 use crate::World;
 
 const MAX_ITERATIONS: usize = 10_000;
-const MAX_CALL_DEPTH: usize = 256;
+const MAX_CALL_DEPTH: usize = 64;
 
 /// Evaluate a source file and return the resulting module.
 #[comemo::memoize]
diff --git a/tests/src/tests.rs b/tests/src/tests.rs
index 12f1ecdc1..66eb532f1 100644
--- a/tests/src/tests.rs
+++ b/tests/src/tests.rs
@@ -2,8 +2,7 @@ use std::cell::{RefCell, RefMut};
 use std::collections::HashMap;
 use std::env;
 use std::ffi::OsStr;
-use std::fs::{self, File};
-use std::io::Read;
+use std::fs;
 use std::ops::Range;
 use std::path::{Path, PathBuf};
 
@@ -325,11 +324,8 @@ fn read(path: &Path) -> FileResult<Vec<u8>> {
         .unwrap_or_else(|_| path.into());
 
     let f = |e| FileError::from_io(e, &suffix);
-    let mut file = File::open(&path).map_err(f)?;
-    if file.metadata().map_err(f)?.is_file() {
-        let mut data = vec![];
-        file.read_to_end(&mut data).map_err(f)?;
-        Ok(data)
+    if fs::metadata(&path).map_err(f)?.is_file() {
+        fs::read(&path).map_err(f)
     } else {
         Err(FileError::IsDirectory)
     }
@@ -472,7 +468,7 @@ fn test_part(
     let mut errors: Vec<_> = errors
         .into_iter()
         .filter(|error| error.span.source() == id)
-        .map(|error| (error.range(world), error.message.to_string()))
+        .map(|error| (error.range(world), error.message.replace('\\', "/")))
         .collect();
 
     errors.sort_by_key(|error| error.0.start);