diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 3e850bc..5956f11 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -170,3 +170,18 @@ jobs:
         run: cp Cargo-${{ matrix.dep }}.lock Cargo.lock
       - name: "Run test script"
         run: ./maintainer-tools/ci/run_task.sh docsrs
+
+  Format:                       #  1 job, run cargo fmt directly.
+    name: Format - nightly toolchain
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - name: "Checkout repo"
+        uses: actions/checkout@v4
+      - name: "Select toolchain"
+        uses: dtolnay/rust-toolchain@nightly
+      - name: "Install rustfmt"
+        run: rustup component add rustfmt
+      - name: "Check formatting"
+        run: cargo +nightly fmt --all -- --check
diff --git a/examples/point.rs b/examples/point.rs
index f8875df..b4bdb95 100644
--- a/examples/point.rs
+++ b/examples/point.rs
@@ -17,7 +17,9 @@ fn main() {
 
     println!();
     println!("Looking in map for key: {}", a);
-    let found = map.get(Ordered::from_ref(&a)).expect("failed to look up key");
+    let found = map
+        .get(Ordered::from_ref(&a))
+        .expect("failed to look up key");
     println!("Found it, with value: {}", found);
 }
 
diff --git a/src/lib.rs b/src/lib.rs
index 1da6142..2717e63 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -87,15 +87,11 @@ impl<T> Ordered<T> {
     /// Creates an `Ordered<T>` from a reference.
     ///
     /// This allows: `let found = map.get(Ordered::from_ref(&a));`
-    pub fn from_ref(value: &T) -> &Self {
-        unsafe { &*(value as *const _ as *const Self) }
-    }
+    pub fn from_ref(value: &T) -> &Self { unsafe { &*(value as *const _ as *const Self) } }
 }
 
 impl<T: ArbitraryOrd> ArbitraryOrd for &T {
-    fn arbitrary_cmp(&self, other: &Self) -> Ordering {
-        (*self).arbitrary_cmp(other)
-    }
+    fn arbitrary_cmp(&self, other: &Self) -> Ordering { (*self).arbitrary_cmp(other) }
 }
 
 impl<T: ArbitraryOrd> PartialOrd for Ordered<T> {
@@ -155,7 +151,9 @@ mod tests {
     }
 
     impl ArbitraryOrd for Point {
-        fn arbitrary_cmp(&self, other: &Self) -> Ordering { (self.x, self.y).cmp(&(other.x, other.y)) }
+        fn arbitrary_cmp(&self, other: &Self) -> Ordering {
+            (self.x, self.y).cmp(&(other.x, other.y))
+        }
     }
 
     #[test]