diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fe6b3df6..548993d0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -51,7 +51,7 @@ jobs:
           submodules: true
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: ${{ matrix.rust }}
+          toolchain: nightly
           override: true
           components: rustfmt
       - name: Check format
diff --git a/src/types/external/tokio/sync/mod.rs b/src/types/external/tokio/sync/mod.rs
index 86312700..55c3490d 100644
--- a/src/types/external/tokio/sync/mod.rs
+++ b/src/types/external/tokio/sync/mod.rs
@@ -1,4 +1,4 @@
 #[cfg(feature = "tokio-sync")]
-mod rw_lock;
-#[cfg(feature = "tokio-sync")]
 mod mutex;
+#[cfg(feature = "tokio-sync")]
+mod rw_lock;
diff --git a/src/types/external/tokio/sync/mutex.rs b/src/types/external/tokio/sync/mutex.rs
index 42d1a6bc..e0d2888a 100644
--- a/src/types/external/tokio/sync/mutex.rs
+++ b/src/types/external/tokio/sync/mutex.rs
@@ -1,13 +1,12 @@
-use tokio::sync::Mutex;
 use std::borrow::Cow;
 
 use async_graphql_parser::types::Field;
+use tokio::sync::Mutex;
 
 use crate::{registry, ContextSelectionSet, OutputType, Positioned, ServerResult, Value};
 
 #[async_trait::async_trait]
-impl<T: OutputType> OutputType for Mutex<T>
-{
+impl<T: OutputType> OutputType for Mutex<T> {
     fn type_name() -> Cow<'static, str> {
         T::type_name()
     }
diff --git a/src/types/external/tokio/sync/rw_lock.rs b/src/types/external/tokio/sync/rw_lock.rs
index de28940b..10eb996d 100644
--- a/src/types/external/tokio/sync/rw_lock.rs
+++ b/src/types/external/tokio/sync/rw_lock.rs
@@ -1,13 +1,12 @@
-use tokio::sync::RwLock;
 use std::borrow::Cow;
 
 use async_graphql_parser::types::Field;
+use tokio::sync::RwLock;
 
 use crate::{registry, ContextSelectionSet, OutputType, Positioned, ServerResult, Value};
 
 #[async_trait::async_trait]
-impl<T: OutputType> OutputType for RwLock<T>
-{
+impl<T: OutputType> OutputType for RwLock<T> {
     fn type_name() -> Cow<'static, str> {
         T::type_name()
     }