diff --git a/src/future/future/delay.rs b/src/future/future/delay.rs
index 45658f45..641084ff 100644
--- a/src/future/future/delay.rs
+++ b/src/future/future/delay.rs
@@ -1,6 +1,6 @@
+use std::future::Future;
 use std::pin::Pin;
 use std::time::Duration;
-use std::future::Future;
 
 use futures_timer::Delay;
 use pin_project_lite::pin_project;
@@ -9,7 +9,7 @@ use crate::task::{Context, Poll};
 
 pin_project! {
     #[doc(hidden)]
-    #[derive(Debug)]
+    #[allow(missing_debug_implementations)]
     pub struct DelayFuture<F> {
         #[pin]
         future: F,
diff --git a/src/future/future/flatten.rs b/src/future/future/flatten.rs
index 1d316440..a07b140c 100644
--- a/src/future/future/flatten.rs
+++ b/src/future/future/flatten.rs
@@ -1,10 +1,11 @@
-use std::pin::Pin;
 use std::future::Future;
+use std::pin::Pin;
 
-use crate::future::{IntoFuture};
+use crate::future::IntoFuture;
 use crate::task::{ready, Context, Poll};
 
-#[derive(Debug)]
+#[doc(hidden)]
+#[allow(missing_debug_implementations)]
 pub struct FlattenFuture<Fut1, Fut2> {
     state: State<Fut1, Fut2>,
 }
diff --git a/src/future/future/mod.rs b/src/future/future/mod.rs
index 729ace7c..5fdaf4b1 100644
--- a/src/future/future/mod.rs
+++ b/src/future/future/mod.rs
@@ -152,7 +152,7 @@ extension_trait! {
         #[cfg_attr(feature = "docs", doc(cfg(unstable)))]
         fn delay(self, dur: Duration) -> impl Future<Output = Self::Output> [DelayFuture<Self>]
         where
-            Self: Future + Sized
+            Self: Sized,
         {
             DelayFuture::new(self, dur)
         }
@@ -173,10 +173,13 @@ extension_trait! {
         /// ```
         #[cfg(feature = "unstable")]
         #[cfg_attr(feature = "docs", doc(cfg(unstable)))]
-        fn flatten(self) -> impl Future<Output = <<Self as Future>::Output as IntoFuture>::Output> [FlattenFuture<Self, <<Self as Future>::Output as IntoFuture>::Future>]
+        fn flatten(
+            self,
+        ) -> impl Future<Output = <Self::Output as IntoFuture>::Output>
+            [FlattenFuture<Self, <Self::Output as IntoFuture>::Future>]
         where
-            Self: Future + Sized,
-            <Self as Future>::Output: IntoFuture
+            Self: Sized,
+            <Self as Future>::Output: IntoFuture,
         {
            FlattenFuture::new(self)
         }
@@ -214,7 +217,7 @@ extension_trait! {
         #[cfg_attr(feature = "docs", doc(cfg(unstable)))]
         fn race<F>(
             self,
-            other: F
+            other: F,
         ) -> impl Future<Output = <Self as std::future::Future>::Output> [Race<Self, F>]
         where
             Self: std::future::Future + Sized,
@@ -258,7 +261,7 @@ extension_trait! {
         "#]
         #[cfg(feature = "unstable")]
         #[cfg_attr(feature = "docs", doc(cfg(unstable)))]
-        fn try_race<F: std::future::Future, T, E>(
+        fn try_race<F, T, E>(
             self,
             other: F
         ) -> impl Future<Output = <Self as std::future::Future>::Output> [TryRace<Self, F>]
diff --git a/src/future/future/race.rs b/src/future/future/race.rs
index 2fd604a7..ed034f05 100644
--- a/src/future/future/race.rs
+++ b/src/future/future/race.rs
@@ -1,10 +1,10 @@
+use std::future::Future;
 use std::pin::Pin;
 
 use async_macros::MaybeDone;
 use pin_project_lite::pin_project;
 
 use crate::task::{Context, Poll};
-use std::future::Future;
 
 pin_project! {
     #[allow(missing_docs)]
diff --git a/src/future/into_future.rs b/src/future/into_future.rs
index a9a81875..8e5e5e04 100644
--- a/src/future/into_future.rs
+++ b/src/future/into_future.rs
@@ -45,7 +45,6 @@ pub trait IntoFuture {
 
 impl<T: Future> IntoFuture for T {
     type Output = T::Output;
-
     type Future = T;
 
     fn into_future(self) -> Self::Future {
diff --git a/src/future/pending.rs b/src/future/pending.rs
index 39f7cab1..968972b5 100644
--- a/src/future/pending.rs
+++ b/src/future/pending.rs
@@ -1,6 +1,6 @@
+use std::future::Future;
 use std::marker::PhantomData;
 use std::pin::Pin;
-use std::future::Future;
 
 use crate::task::{Context, Poll};