diff --git a/Cargo.lock b/Cargo.lock
index 792f5c92a..598dc49e0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -252,7 +252,6 @@ dependencies = [
  "hashbrown",
  "humansize",
  "ignore",
- "itertools 0.11.0",
  "lazy_static",
  "libc",
  "libmimalloc-sys",
@@ -492,15 +491,6 @@ dependencies = [
  "either",
 ]
 
-[[package]]
-name = "itertools"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1c173a5686ce8bfa551b3563d0c2170bf24ca44da99c7ca4bfdab5418c3fe57"
-dependencies = [
- "either",
-]
-
 [[package]]
 name = "itoa"
 version = "1.0.10"
@@ -673,7 +663,7 @@ checksum = "59230a63c37f3e18569bdb90e4a89cbf5bf8b06fea0b84e65ea10cc4df47addd"
 dependencies = [
  "difflib",
  "float-cmp",
- "itertools 0.10.5",
+ "itertools",
  "normalize-line-endings",
  "predicates-core",
  "regex",
diff --git a/Cargo.toml b/Cargo.toml
index c94430aed..bcc50c3fe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,7 +36,6 @@ pkg-fmt = "zip"
 [dependencies]
 regex = "1.10.4"
 clap = { version = "4.0.0", features = ["cargo", "env", "wrap_help", "string"] }
-itertools = "0.11.0"
 typed-arena = "2.0.2"
 rustc-hash = "2.0.0"
 strsim = "0.10.0"
diff --git a/src/diff/dijkstra.rs b/src/diff/dijkstra.rs
index c79eaa90c..55ffc3f9c 100644
--- a/src/diff/dijkstra.rs
+++ b/src/diff/dijkstra.rs
@@ -4,7 +4,6 @@
 use std::{cmp::Reverse, env};
 
 use bumpalo::Bump;
-use itertools::Itertools;
 use radix_heap::RadixHeapMap;
 
 use crate::{
@@ -240,7 +239,7 @@ pub(crate) fn mark_syntax<'a>(
                 )
             })
             .take(print_length)
-            .collect_vec()
+            .collect::<Vec<_>>()
     );
 
     populate_change_map(&route, change_map);
@@ -249,7 +248,6 @@ pub(crate) fn mark_syntax<'a>(
 
 #[cfg(test)]
 mod tests {
-    use itertools::Itertools;
     use line_numbers::SingleLineSpan;
     use typed_arena::Arena;
 
@@ -282,7 +280,7 @@ mod tests {
         let vertex_arena = Bump::new();
         let route = shortest_path(start, &vertex_arena, 0, DEFAULT_GRAPH_LIMIT).unwrap();
 
-        let actions = route.iter().map(|(action, _)| *action).collect_vec();
+        let actions = route.iter().map(|(action, _)| *action).collect::<Vec<_>>();
         assert_eq!(
             actions,
             vec![UnchangedNode {
@@ -324,7 +322,7 @@ mod tests {
         let vertex_arena = Bump::new();
         let route = shortest_path(start, &vertex_arena, 0, DEFAULT_GRAPH_LIMIT).unwrap();
 
-        let actions = route.iter().map(|(action, _)| *action).collect_vec();
+        let actions = route.iter().map(|(action, _)| *action).collect::<Vec<_>>();
         assert_eq!(
             actions,
             vec![
@@ -366,7 +364,7 @@ mod tests {
         let vertex_arena = Bump::new();
         let route = shortest_path(start, &vertex_arena, 0, DEFAULT_GRAPH_LIMIT).unwrap();
 
-        let actions = route.iter().map(|(action, _)| *action).collect_vec();
+        let actions = route.iter().map(|(action, _)| *action).collect::<Vec<_>>();
         assert_eq!(
             actions,
             vec![
@@ -412,7 +410,7 @@ mod tests {
         let vertex_arena = Bump::new();
         let route = shortest_path(start, &vertex_arena, 0, DEFAULT_GRAPH_LIMIT).unwrap();
 
-        let actions = route.iter().map(|(action, _)| *action).collect_vec();
+        let actions = route.iter().map(|(action, _)| *action).collect::<Vec<_>>();
         assert_eq!(
             actions,
             vec![
@@ -453,7 +451,7 @@ mod tests {
         let vertex_arena = Bump::new();
         let route = shortest_path(start, &vertex_arena, 0, DEFAULT_GRAPH_LIMIT).unwrap();
 
-        let actions = route.iter().map(|(action, _)| *action).collect_vec();
+        let actions = route.iter().map(|(action, _)| *action).collect::<Vec<_>>();
         assert_eq!(
             actions,
             vec![ReplacedComment {
@@ -485,7 +483,7 @@ mod tests {
         let vertex_arena = Bump::new();
         let route = shortest_path(start, &vertex_arena, 0, DEFAULT_GRAPH_LIMIT).unwrap();
 
-        let actions = route.iter().map(|(action, _)| *action).collect_vec();
+        let actions = route.iter().map(|(action, _)| *action).collect::<Vec<_>>();
         assert_eq!(
             actions,
             vec![ReplacedComment {
@@ -525,7 +523,7 @@ mod tests {
         let vertex_arena = Bump::new();
         let route = shortest_path(start, &vertex_arena, 0, DEFAULT_GRAPH_LIMIT).unwrap();
 
-        let actions = route.iter().map(|(action, _)| *action).collect_vec();
+        let actions = route.iter().map(|(action, _)| *action).collect::<Vec<_>>();
         assert_eq!(
             actions,
             vec![
diff --git a/src/options.rs b/src/options.rs
index 517b00ff2..2f524f4e6 100644
--- a/src/options.rs
+++ b/src/options.rs
@@ -9,7 +9,6 @@ use std::{
 
 use clap::{crate_authors, crate_description, value_parser, Arg, ArgAction, Command};
 use crossterm::tty::IsTty;
-use itertools::Itertools;
 
 use crate::{
     display::style::BackgroundColor,
@@ -612,19 +611,20 @@ fn parse_overrides_or_die(raw_overrides: &[String]) -> Vec<(LanguageOverride, Ve
         std::process::exit(EXIT_BAD_ARGUMENTS);
     }
 
-    overrides
-        .into_iter()
-        .coalesce(
-            |(prev_lang, mut prev_globs), (current_lang, current_globs)| {
-                if prev_lang == current_lang {
-                    prev_globs.extend(current_globs);
-                    Ok((prev_lang, prev_globs))
-                } else {
-                    Err(((prev_lang, prev_globs), (current_lang, current_globs)))
-                }
-            },
-        )
-        .collect()
+    let mut combined_overrides: Vec<(LanguageOverride, Vec<glob::Pattern>)> = vec![];
+    for (lang, globs) in overrides {
+        if let Some((prev_lang, prev_globs)) = combined_overrides.last_mut() {
+            if *prev_lang == lang {
+                prev_globs.extend(globs);
+            } else {
+                combined_overrides.push((lang, globs));
+            }
+        } else {
+            combined_overrides.push((lang, globs));
+        }
+    }
+
+    combined_overrides
 }
 
 /// Parse CLI arguments passed to the binary.