diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index cdfe354c..17b8353e 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -18,7 +18,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: nightly
-          components: rust-src
+          components: rust-src, rustfmt
           override: true
       - name: install
         run: rustup target add thumbv7em-none-eabi thumbv6m-none-eabi
diff --git a/ci.sh b/ci.sh
index d726db37..d169246b 100755
--- a/ci.sh
+++ b/ci.sh
@@ -4,6 +4,8 @@ set -euxo pipefail
 
 cd $(dirname $0)
 
+cargo fmt --all -- --check
+
 # embassy std
 (cd embassy-std-examples; cargo build)
 
diff --git a/embassy/src/io/traits.rs b/embassy/src/io/traits.rs
index f1f91a46..6138adb4 100644
--- a/embassy/src/io/traits.rs
+++ b/embassy/src/io/traits.rs
@@ -1,4 +1,3 @@
-
 use core::ops::DerefMut;
 use core::pin::Pin;
 use core::task::{Context, Poll};
diff --git a/embassy/src/io/util/read.rs b/embassy/src/io/util/read.rs
index 31aaa0da..274b43a4 100644
--- a/embassy/src/io/util/read.rs
+++ b/embassy/src/io/util/read.rs
@@ -1,4 +1,4 @@
-use super::super::error::{Result};
+use super::super::error::Result;
 use super::super::traits::AsyncBufRead;
 
 use core::cmp::min;
diff --git a/embassy/src/io/util/read_buf.rs b/embassy/src/io/util/read_buf.rs
index 7489eac2..71299b05 100644
--- a/embassy/src/io/util/read_buf.rs
+++ b/embassy/src/io/util/read_buf.rs
@@ -1,4 +1,4 @@
-use super::super::error::{Result};
+use super::super::error::Result;
 use super::super::traits::AsyncBufRead;
 
 use core::pin::Pin;