diff --git a/Cargo.toml b/Cargo.toml
index 7fa67c6828..f722042e84 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -41,6 +41,8 @@ want = { version = "0.3", optional = true }
 
 [dev-dependencies]
 form_urlencoded = "1"
+futures-channel = { version = "0.3", features = ["sink"] }
+futures-util = { version = "0.3", default-features = false, features = ["sink"] }
 http-body-util = "0.1"
 pretty_env_logger = "0.5"
 spmc = "0.3"
diff --git a/benches/end_to_end.rs b/benches/end_to_end.rs
index 3558e5c611..08d5c90548 100644
--- a/benches/end_to_end.rs
+++ b/benches/end_to_end.rs
@@ -140,7 +140,6 @@ fn http2_parallel_x10_req_10mb(b: &mut test::Bencher) {
 }
 
 #[bench]
-#[ignore]
 fn http2_parallel_x10_req_10kb_100_chunks(b: &mut test::Bencher) {
     let body = &[b'x'; 1024 * 10];
     opts()
@@ -152,7 +151,6 @@ fn http2_parallel_x10_req_10kb_100_chunks(b: &mut test::Bencher) {
 }
 
 #[bench]
-#[ignore]
 fn http2_parallel_x10_req_10kb_100_chunks_adaptive_window(b: &mut test::Bencher) {
     let body = &[b'x'; 1024 * 10];
     opts()
@@ -165,7 +163,6 @@ fn http2_parallel_x10_req_10kb_100_chunks_adaptive_window(b: &mut test::Bencher)
 }
 
 #[bench]
-#[ignore]
 fn http2_parallel_x10_req_10kb_100_chunks_max_window(b: &mut test::Bencher) {
     let body = &[b'x'; 1024 * 10];
     opts()
@@ -294,7 +291,7 @@ impl Opts {
                 .build()
                 .expect("rt build"),
         );
-        //let exec = rt.clone();
+        let exec = rt.clone();
 
         let req_len = self.request_body.map(|b| b.len()).unwrap_or(0) as u64;
         let req_len = if self.request_chunks > 0 {
@@ -344,19 +341,21 @@ impl Opts {
         let make_request = || {
             let chunk_cnt = self.request_chunks;
             let body = if chunk_cnt > 0 {
-                /*
-                let (mut tx, body) = Body::channel();
+                let (mut tx, rx) = futures_channel::mpsc::channel(0);
+
                 let chunk = self
                     .request_body
                     .expect("request_chunks means request_body");
                 exec.spawn(async move {
+                    use futures_util::SinkExt;
+                    use hyper::body::Frame;
                     for _ in 0..chunk_cnt {
-                        tx.send_data(chunk.into()).await.expect("send_data");
+                        tx.send(Ok(Frame::data(bytes::Bytes::from(chunk))))
+                            .await
+                            .expect("send_data");
                     }
                 });
-                body
-                */
-                todo!("request_chunks");
+                http_body_util::StreamBody::new(rx).boxed()
             } else if let Some(chunk) = self.request_body {
                 http_body_util::Full::new(bytes::Bytes::from(chunk)).boxed()
             } else {
diff --git a/src/client/dispatch.rs b/src/client/dispatch.rs
index 88b3107877..60504e68b3 100644
--- a/src/client/dispatch.rs
+++ b/src/client/dispatch.rs
@@ -342,7 +342,7 @@ mod tests {
     use super::{channel, Callback, Receiver};
 
     #[derive(Debug)]
-    struct Custom(i32);
+    struct Custom(#[allow(dead_code)] i32);
 
     impl<T, U> Future for Receiver<T, U> {
         type Output = Option<(T, Callback<T, U>)>;