diff --git a/clippy_lints/src/manual_is_ascii_check.rs b/clippy_lints/src/manual_is_ascii_check.rs
index b1578627b..6ee94551d 100644
--- a/clippy_lints/src/manual_is_ascii_check.rs
+++ b/clippy_lints/src/manual_is_ascii_check.rs
@@ -24,6 +24,14 @@ declare_clippy_lint! {
     ///     assert!(matches!(b'X', b'A'..=b'Z'));
     ///     assert!(matches!('2', '0'..='9'));
     ///     assert!(matches!('x', 'A'..='Z' | 'a'..='z'));
+    ///
+    ///     assert!((b'0'..=b'9').contains(&b'0'));
+    ///     assert!((b'a'..=b'z').contains(&b'a'));
+    ///     assert!((b'A'..=b'Z').contains(&b'A'));
+    ///
+    ///     assert!(('0'..='9').contains(&'0'));
+    ///     assert!(('a'..='z').contains(&'a'));
+    ///     assert!(('A'..='Z').contains(&'A'));
     /// }
     /// ```
     /// Use instead:
@@ -33,6 +41,14 @@ declare_clippy_lint! {
     ///     assert!(b'X'.is_ascii_uppercase());
     ///     assert!('2'.is_ascii_digit());
     ///     assert!('x'.is_ascii_alphabetic());
+    ///
+    ///     assert!(b'0'.is_ascii_digit());
+    ///     assert!(b'a'.is_ascii_lowercase());
+    ///     assert!(b'A'.is_ascii_uppercase());
+    ///
+    ///     assert!('0'.is_ascii_digit());
+    ///     assert!('a'.is_ascii_lowercase());
+    ///     assert!('A'.is_ascii_uppercase());
     /// }
     /// ```
     #[clippy::version = "1.66.0"]