diff --git a/src/bin/ruff.rs b/src/bin/ruff.rs
index b74360f97f..5ed99d7ec0 100644
--- a/src/bin/ruff.rs
+++ b/src/bin/ruff.rs
@@ -116,7 +116,7 @@ fn inner_main() -> Result<ExitCode> {
     let paths: Vec<&Path> = cli.files.iter().map(PathBuf::as_path).collect();
     let mut settings = Settings::from_paths(paths)?;
     if !cli.select.is_empty() {
-        settings.select(&cli.select);
+        settings.select(cli.select);
     }
     if !cli.ignore.is_empty() {
         settings.ignore(&cli.ignore);
diff --git a/src/settings.rs b/src/settings.rs
index e207451630..9c2d2acc1f 100644
--- a/src/settings.rs
+++ b/src/settings.rs
@@ -55,11 +55,16 @@ impl Settings {
         })
     }
 
-    pub fn select(&mut self, codes: &[CheckCode]) {
-        self.select.retain(|code| codes.contains(code));
+    pub fn select(&mut self, codes: Vec<CheckCode>) {
+        self.select.clear();
+        for code in codes {
+            self.select.insert(code);
+        }
     }
 
     pub fn ignore(&mut self, codes: &[CheckCode]) {
-        self.select.retain(|code| !codes.contains(code));
+        for code in codes {
+            self.select.remove(code);
+        }
     }
 }