diff --git a/selene-lib/src/lints.rs b/selene-lib/src/lints.rs
index d3ba8989..6f3a1584 100644
--- a/selene-lib/src/lints.rs
+++ b/selene-lib/src/lints.rs
@@ -137,7 +137,7 @@ impl Diagnostic {
                     if suggestion_str.is_empty() {
                         "consider removing this".to_string()
                     } else {
-                        format!("try: `{}`", suggestion_str)
+                        format!("try: `{suggestion_str}`")
                     },
                 );
             }
@@ -196,14 +196,17 @@ impl Diagnostic {
         }
     }
 
+    #[must_use]
     pub fn start_position(&self) -> u32 {
         self.primary_label.range.0
     }
 
+    #[must_use]
     pub fn has_machine_applicable_fix(&self) -> bool {
         self.suggestion.is_some() && self.applicability == Applicability::MachineApplicable
     }
 
+    #[must_use]
     pub fn has_maybe_incorrect_fix(&self) -> bool {
         self.suggestion.is_some() && self.applicability == Applicability::MaybeIncorrect
     }
@@ -211,13 +214,13 @@ impl Diagnostic {
     /// After applying suggestions, calls `get_new_diagnostics` and reruns to ensure fixes didn't produce new errors
     pub fn get_applied_suggestions_code<F>(
         code: &str,
-        diagnostics: Vec<&Diagnostic>,
+        diagnostics: &[&Diagnostic],
         get_new_diagnostics: F,
     ) -> String
     where
         F: Fn(&str) -> Vec<Diagnostic>,
     {
-        let mut chosen_diagnostics = Self::get_independent_suggestions(&diagnostics);
+        let mut chosen_diagnostics = Self::get_independent_suggestions(diagnostics);
         let mut owned_diagnostics_ref;
         let mut owned_diagnostics;
 
diff --git a/selene-lib/src/lints/test_util.rs b/selene-lib/src/lints/test_util.rs
index 5216d385..c4b2d7c8 100644
--- a/selene-lib/src/lints/test_util.rs
+++ b/selene-lib/src/lints/test_util.rs
@@ -142,7 +142,7 @@ pub fn test_lint_config_with_output<
 
     suggestion = Diagnostic::get_applied_suggestions_code(
         suggestion.as_str(),
-        fixed_diagnostics,
+        &fixed_diagnostics,
         |new_code| {
             let fixed_ast = full_moon::parse(new_code).unwrap_or_else(|_| {
                 panic!(
diff --git a/selene/src/main.rs b/selene/src/main.rs
index 3a640bf8..98f490f5 100644
--- a/selene/src/main.rs
+++ b/selene/src/main.rs
@@ -297,7 +297,7 @@ fn read<R: Read>(
 
         suggestion = Diagnostic::get_applied_suggestions_code(
             suggestion.as_str(),
-            diagnostics
+            &diagnostics
                 .iter()
                 .filter(|diagnostic| diagnostic.diagnostic.has_machine_applicable_fix())
                 .map(|diagnostic| &diagnostic.diagnostic)