diff --git a/src/conditional/etag.rs b/src/conditional/etag.rs
index 00d59194..548e4bdb 100644
--- a/src/conditional/etag.rs
+++ b/src/conditional/etag.rs
@@ -117,7 +117,7 @@ impl ETag {
 
         if !s
             .bytes()
-            .all(|c| c == 0x21 || (c >= 0x23 && c <= 0x7E) || c >= 0x80)
+            .all(|c| c == 0x21 || (0x23..=0x7E).contains(&c) || c >= 0x80)
         {
             return Err(Error::from_str(
                 StatusCode::BadRequest,
diff --git a/src/headers/header_name.rs b/src/headers/header_name.rs
index 2d584e3d..d4eb21be 100644
--- a/src/headers/header_name.rs
+++ b/src/headers/header_name.rs
@@ -135,6 +135,7 @@ mod tests {
     use super::*;
 
     #[test]
+    #[allow(clippy::eq_op)]
     fn test_header_name_static_non_static() {
         let static_header = HeaderName::from_lowercase_str("hello");
         let non_static_header = HeaderName::from_str("hello").unwrap();
diff --git a/src/other/retry_after.rs b/src/other/retry_after.rs
index 295c0184..bfe81f22 100644
--- a/src/other/retry_after.rs
+++ b/src/other/retry_after.rs
@@ -109,9 +109,9 @@ impl RetryAfter {
     }
 }
 
-impl Into<SystemTime> for RetryAfter {
-    fn into(self) -> SystemTime {
-        match self.inner {
+impl From<RetryAfter> for SystemTime {
+    fn from(retry_after: RetryAfter) -> Self {
+        match retry_after.inner {
             RetryDirective::Duration(dur) => SystemTime::now() + dur,
             RetryDirective::SystemTime(at) => at,
         }
diff --git a/src/status_code.rs b/src/status_code.rs
index 749e9128..b98ee9bd 100644
--- a/src/status_code.rs
+++ b/src/status_code.rs
@@ -434,7 +434,7 @@ impl StatusCode {
     /// continuing process.
     pub fn is_informational(&self) -> bool {
         let num: u16 = self.clone().into();
-        num >= 100 && num < 200
+        (100..200).contains(&num)
     }
 
     /// Returns `true` if the status code is the `2xx` range.
@@ -443,7 +443,7 @@ impl StatusCode {
     /// received, understood, and accepted.
     pub fn is_success(&self) -> bool {
         let num: u16 = self.clone().into();
-        num >= 200 && num < 300
+        (200..300).contains(&num)
     }
 
     /// Returns `true` if the status code is the `3xx` range.
@@ -452,7 +452,7 @@ impl StatusCode {
     /// taken in order to complete the request.
     pub fn is_redirection(&self) -> bool {
         let num: u16 = self.clone().into();
-        num >= 300 && num < 400
+        (300..400).contains(&num)
     }
 
     /// Returns `true` if the status code is the `4xx` range.
@@ -461,7 +461,7 @@ impl StatusCode {
     /// or cannot be fulfilled.
     pub fn is_client_error(&self) -> bool {
         let num: u16 = self.clone().into();
-        num >= 400 && num < 500
+        (400..500).contains(&num)
     }
 
     /// Returns `true` if the status code is the `5xx` range.
@@ -470,7 +470,7 @@ impl StatusCode {
     /// apparently valid request.
     pub fn is_server_error(&self) -> bool {
         let num: u16 = self.clone().into();
-        num >= 500 && num < 600
+        (500..600).contains(&num)
     }
 
     /// The canonical reason for a given status code