diff --git a/codegen/src/main.rs b/codegen/src/main.rs
index 4b88039a1..7659ad93d 100644
--- a/codegen/src/main.rs
+++ b/codegen/src/main.rs
@@ -1,4 +1,4 @@
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 
 fn main() {
     // tonic-health
@@ -45,11 +45,11 @@ fn main() {
 }
 
 fn codegen(
-    root_dir: &PathBuf,
+    root_dir: &Path,
     iface_files: &[&str],
     include_dirs: &[&str],
-    out_dir: &PathBuf,
-    file_descriptor_set_path: &PathBuf,
+    out_dir: &Path,
+    file_descriptor_set_path: &Path,
     build_client: bool,
     build_server: bool,
 ) {
@@ -59,12 +59,12 @@ fn codegen(
         .unwrap();
 
     let iface_files: Vec<PathBuf> = iface_files
-        .into_iter()
+        .iter()
         .map(|&path| root_dir.join(path))
         .collect();
 
     let include_dirs: Vec<PathBuf> = include_dirs
-        .into_iter()
+        .iter()
         .map(|&path| root_dir.join(path))
         .collect();
     let out_dir = root_dir.join(out_dir);
diff --git a/examples/src/dynamic/server.rs b/examples/src/dynamic/server.rs
index e25c7e8ae..300ec868c 100644
--- a/examples/src/dynamic/server.rs
+++ b/examples/src/dynamic/server.rs
@@ -32,10 +32,7 @@ impl Echo for MyEcho {
 }
 
 fn init_echo(args: &[String], builder: &mut RoutesBuilder) {
-    let enabled = args
-        .into_iter()
-        .find(|arg| arg.as_str() == "echo")
-        .is_some();
+    let enabled = args.iter().any(|arg| arg.as_str() == "echo");
     if enabled {
         println!("Adding Echo service...");
         let svc = EchoServer::new(MyEcho::default());
@@ -62,10 +59,7 @@ impl Greeter for MyGreeter {
 }
 
 fn init_greeter(args: &[String], builder: &mut RoutesBuilder) {
-    let enabled = args
-        .into_iter()
-        .find(|arg| arg.as_str() == "greeter")
-        .is_some();
+    let enabled = args.iter().any(|arg| arg.as_str() == "greeter");
 
     if enabled {
         println!("Adding Greeter service...");
diff --git a/tonic-build/src/server.rs b/tonic-build/src/server.rs
index 9e42789ef..d9ab1ad6b 100644
--- a/tonic-build/src/server.rs
+++ b/tonic-build/src/server.rs
@@ -9,6 +9,7 @@ use proc_macro2::{Span, TokenStream};
 use quote::quote;
 use syn::{Ident, Lit, LitStr};
 
+#[allow(clippy::too_many_arguments)]
 pub(crate) fn generate_internal<T: Service>(
     service: &T,
     emit_package: bool,
@@ -209,6 +210,7 @@ pub(crate) fn generate_internal<T: Service>(
     }
 }
 
+#[allow(clippy::too_many_arguments)]
 fn generate_trait<T: Service>(
     service: &T,
     emit_package: bool,
diff --git a/tonic-web/src/call.rs b/tonic-web/src/call.rs
index 353e644e5..68c9674bb 100644
--- a/tonic-web/src/call.rs
+++ b/tonic-web/src/call.rs
@@ -423,7 +423,7 @@ fn make_trailers_frame(trailers: HeaderMap) -> Vec<u8> {
 /// or the buffer jsut contained grpc message frames.
 fn find_trailers(buf: &[u8]) -> FindTrailers {
     let mut len = 0;
-    let mut temp_buf = &buf[..];
+    let mut temp_buf = buf;
 
     loop {
         // To check each frame, there must be at least GRPC_HEADER_SIZE
@@ -448,7 +448,7 @@ fn find_trailers(buf: &[u8]) -> FindTrailers {
             return FindTrailers::IncompleteBuf;
         }
 
-        temp_buf = &buf[len as usize..];
+        temp_buf = &buf[len..];
     }
 }
 
@@ -503,7 +503,7 @@ mod tests {
     fn find_trailers_non_buffered() {
         // Byte version of this:
         // b"\x80\0\0\0\x0fgrpc-status:0\r\n"
-        let buf = vec![
+        let buf = [
             128, 0, 0, 0, 15, 103, 114, 112, 99, 45, 115, 116, 97, 116, 117, 115, 58, 48, 13, 10,
         ];
 
@@ -516,7 +516,7 @@ mod tests {
     fn find_trailers_buffered() {
         // Byte version of this:
         // b"\0\0\0\0L\n$975738af-1a17-4aea-b887-ed0bbced6093\x1a$da609e9b-f470-4cc0-a691-3fd6a005a436\x80\0\0\0\x0fgrpc-status:0\r\n"
-        let buf = vec![
+        let buf = [
             0, 0, 0, 0, 76, 10, 36, 57, 55, 53, 55, 51, 56, 97, 102, 45, 49, 97, 49, 55, 45, 52,
             97, 101, 97, 45, 98, 56, 56, 55, 45, 101, 100, 48, 98, 98, 99, 101, 100, 54, 48, 57,
             51, 26, 36, 100, 97, 54, 48, 57, 101, 57, 98, 45, 102, 52, 55, 48, 45, 52, 99, 99, 48,
diff --git a/tonic-web/tests/integration/tests/grpc.rs b/tonic-web/tests/integration/tests/grpc.rs
index 8e81ef68c..98eca1f92 100644
--- a/tonic-web/tests/integration/tests/grpc.rs
+++ b/tonic-web/tests/integration/tests/grpc.rs
@@ -129,7 +129,7 @@ async fn spawn() -> Result<(Client, Client, Client, Client), Error> {
     let ((s1, u1), (s2, u2), (s3, u3), (s4, u4)) =
         join!(grpc(true), grpc(false), grpc_web(true), grpc_web(false));
 
-    let _ = tokio::spawn(async move { join!(s1, s2, s3, s4) });
+    drop(tokio::spawn(async move { join!(s1, s2, s3, s4) }));
 
     tokio::time::sleep(Duration::from_millis(30)).await;
 
diff --git a/tonic-web/tests/integration/tests/grpc_web.rs b/tonic-web/tests/integration/tests/grpc_web.rs
index e062a8380..3343d754c 100644
--- a/tonic-web/tests/integration/tests/grpc_web.rs
+++ b/tonic-web/tests/integration/tests/grpc_web.rs
@@ -65,7 +65,7 @@ async fn spawn() -> String {
     let url = format!("http://{}", listener.local_addr().unwrap());
     let listener_stream = TcpListenerStream::new(listener);
 
-    let _ = tokio::spawn(async move {
+    drop(tokio::spawn(async move {
         Server::builder()
             .accept_http1(true)
             .layer(GrpcWebLayer::new())
@@ -73,7 +73,7 @@ async fn spawn() -> String {
             .serve_with_incoming(listener_stream)
             .await
             .unwrap()
-    });
+    }));
 
     url
 }
diff --git a/tonic/src/codec/encode.rs b/tonic/src/codec/encode.rs
index bd48ee47b..593634f93 100644
--- a/tonic/src/codec/encode.rs
+++ b/tonic/src/codec/encode.rs
@@ -106,14 +106,14 @@ where
             BytesMut::new()
         };
 
-        return EncodedBytes {
+        Self {
             source: Fuse::new(source),
             encoder,
             compression_encoding,
             max_message_size,
             buf,
             uncompression_buf,
-        };
+        }
     }
 }
 
diff --git a/tonic/src/codec/prost.rs b/tonic/src/codec/prost.rs
index 47e736a71..d2f1652f4 100644
--- a/tonic/src/codec/prost.rs
+++ b/tonic/src/codec/prost.rs
@@ -326,7 +326,6 @@ mod tests {
                 }
             }
 
-            #[allow(clippy::drop_ref)]
             fn poll_trailers(
                 self: Pin<&mut Self>,
                 _cx: &mut Context<'_>,