diff --git a/crates/analyzer/src/names.rs b/crates/analyzer/src/names.rs
index 9bed3ad5..2a6e2b91 100644
--- a/crates/analyzer/src/names.rs
+++ b/crates/analyzer/src/names.rs
@@ -25,7 +25,7 @@ pub struct ModuleName(Arc<str>);
 
 impl ModuleName {
     pub fn iter(&self) -> impl Iterator<Item = &str> {
-        self.0.split(".")
+        self.0.split('.')
     }
 }
 
diff --git a/crates/analyzer/src/resolver/module.rs b/crates/analyzer/src/resolver/module.rs
index 1cdafb55..3f4ecd38 100644
--- a/crates/analyzer/src/resolver/module.rs
+++ b/crates/analyzer/src/resolver/module.rs
@@ -35,7 +35,7 @@ impl ModuleMap {
     }
 
     pub fn file_id(&self, module_name: &ModuleName) -> FileId {
-        *self.name_to_file.get(&module_name).unwrap()
+        *self.name_to_file.get(module_name).unwrap()
     }
 
     pub fn module_name(&self, file_id: FileId) -> ModuleName {
diff --git a/crates/lexing/src/lexer.rs b/crates/lexing/src/lexer.rs
index 6fcfe39b..c542ee1d 100644
--- a/crates/lexing/src/lexer.rs
+++ b/crates/lexing/src/lexer.rs
@@ -415,5 +415,5 @@ fn is_lower_start(c: char) -> bool {
 }
 
 fn is_hex_digit(c: char) -> bool {
-    matches!(c, 'a'..='f' | 'A'..='F' | '0'..='9')
+    c.is_ascii_hexdigit()
 }