diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f733406..9eccc22 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -169,7 +169,10 @@ jobs:
         run: cargo fmt --all -- --check
 
       - name: Run cargo clippy
-        run: cargo clippy --all-features
+        run: |
+          cargo clippy --tests --all-features
+          # See PR#75: https://github.com/asynchronics/nexosim/pull/75
+          cargo clippy --examples --all-features -- -A clippy::new_without_default -A clippy::manual_async_fn
 
   docs:
     name: Docs
diff --git a/nexosim-util/examples/observables.rs b/nexosim-util/examples/observables.rs
index 16e598c..c80f2b0 100644
--- a/nexosim-util/examples/observables.rs
+++ b/nexosim-util/examples/observables.rs
@@ -48,18 +48,14 @@ pub enum ModeId {
 }
 
 /// Processor state.
+#[derive(Default)]
 pub enum State {
+    #[default]
     Off,
     Idle,
     Processing(AutoActionKey),
 }
 
-impl Default for State {
-    fn default() -> Self {
-        State::Off
-    }
-}
-
 impl Observable<ModeId> for State {
     fn observe(&self) -> ModeId {
         match *self {
diff --git a/nexosim/src/channel/queue.rs b/nexosim/src/channel/queue.rs
index 57747de..6c15c58 100644
--- a/nexosim/src/channel/queue.rs
+++ b/nexosim/src/channel/queue.rs
@@ -482,7 +482,7 @@ mod tests {
 
         assert!(matches!(c.pop(), Err(PopError::Empty)));
 
-        assert!(matches!(p.push(|b| RecycleBox::recycle(b, 42)), Ok(_)));
+        assert!(p.push(|b| RecycleBox::recycle(b, 42)).is_ok());
         p.close();
 
         assert_eq!(*c.pop().unwrap(), 42);
@@ -493,12 +493,12 @@ mod tests {
     fn queue_closed_by_consumer() {
         let (p, mut c) = queue(3);
 
-        assert_eq!(p.is_closed(), false);
-        assert!(matches!(p.push(|b| RecycleBox::recycle(b, 42)), Ok(_)));
+        assert!(!p.is_closed());
+        assert!(p.push(|b| RecycleBox::recycle(b, 42)).is_ok());
 
         c.close();
 
-        assert_eq!(p.is_closed(), true);
+        assert!(p.is_closed());
         assert!(matches!(
             p.push(|b| RecycleBox::recycle(b, 13)),
             Err(PushError::Closed)
diff --git a/nexosim/src/executor.rs b/nexosim/src/executor.rs
index 90f8884..b2d145c 100644
--- a/nexosim/src/executor.rs
+++ b/nexosim/src/executor.rs
@@ -173,7 +173,9 @@ mod tests {
     }
     impl<F: FnOnce()> Drop for RunOnDrop<F> {
         fn drop(&mut self) {
-            self.drop_fn.take().map(|f| f());
+            if let Some(f) = self.drop_fn.take() {
+                f()
+            }
         }
     }
 
diff --git a/nexosim/src/executor/task/tests/general.rs b/nexosim/src/executor/task/tests/general.rs
index 00c42b7..0937ac9 100644
--- a/nexosim/src/executor/task/tests/general.rs
+++ b/nexosim/src/executor/task/tests/general.rs
@@ -164,13 +164,13 @@ fn task_schedule() {
 
     let (future, future_is_alive, output_is_alive) = MonitoredFuture::new(async move { 42 });
     let (promise, runnable, _cancel_token) = spawn(future, schedule_runnable, ());
-    assert_eq!(future_is_alive.get(), true);
-    assert_eq!(output_is_alive.get(), false);
+    assert!(future_is_alive.get());
+    assert!(!output_is_alive.get());
 
     // The task should complete immediately when ran.
     runnable.run();
-    assert_eq!(future_is_alive.get(), false);
-    assert_eq!(output_is_alive.get(), true);
+    assert!(!future_is_alive.get());
+    assert!(output_is_alive.get());
     assert_eq!(promise.poll().map(|v| *v), Stage::Ready(42));
 }
 
@@ -200,13 +200,13 @@ fn task_schedule_and_forget() {
 
     let (future, future_is_alive, output_is_alive) = MonitoredFuture::new(async {});
     let (runnable, _cancel_token) = spawn_and_forget(future, schedule_runnable, ());
-    assert_eq!(future_is_alive.get(), true);
-    assert_eq!(output_is_alive.get(), false);
+    assert!(future_is_alive.get());
+    assert!(!output_is_alive.get());
 
     // The task should complete immediately when ran.
     runnable.run();
-    assert_eq!(future_is_alive.get(), false);
-    assert_eq!(output_is_alive.get(), true);
+    assert!(!future_is_alive.get());
+    assert!(output_is_alive.get());
 }
 
 #[test]
@@ -215,25 +215,23 @@ fn task_wake() {
 
     let (sender, receiver) = oneshot::channel();
 
-    let (future, future_is_alive, output_is_alive) = MonitoredFuture::new(async move {
-        let result = receiver.await.unwrap();
-        result
-    });
+    let (future, future_is_alive, output_is_alive) =
+        MonitoredFuture::new(async move { receiver.await.unwrap() });
 
     let (promise, runnable, _cancel_token) = spawn(future, schedule_runnable, ());
     runnable.run();
 
     // The future should have been polled but should not have completed.
-    assert_eq!(output_is_alive.get(), false);
+    assert!(!output_is_alive.get());
     assert!(promise.poll().is_pending());
 
     // Wake the task.
     sender.send(42).unwrap();
 
     // The task should have been scheduled by the channel sender.
-    assert_eq!(run_scheduled_runnable(), true);
-    assert_eq!(future_is_alive.get(), false);
-    assert_eq!(output_is_alive.get(), true);
+    assert!(run_scheduled_runnable());
+    assert!(!future_is_alive.get());
+    assert!(output_is_alive.get());
     assert_eq!(promise.poll().map(|v| *v), Stage::Ready(42));
 }
 
@@ -244,10 +242,7 @@ fn task_wake_mt() {
     let (sender, receiver) = oneshot::channel();
 
     let (promise, runnable, _cancel_token) = spawn(
-        async move {
-            let result = receiver.await.unwrap();
-            result
-        },
+        async move { receiver.await.unwrap() },
         schedule_runnable,
         (),
     );
@@ -284,15 +279,15 @@ fn task_wake_and_forget() {
     runnable.run();
 
     // The future should have been polled but should not have completed.
-    assert_eq!(output_is_alive.get(), false);
+    assert!(!output_is_alive.get());
 
     // Wake the task.
     sender.send(42).unwrap();
 
     // The task should have been scheduled by the channel sender.
-    assert_eq!(run_scheduled_runnable(), true);
-    assert_eq!(future_is_alive.get(), false);
-    assert_eq!(output_is_alive.get(), true);
+    assert!(run_scheduled_runnable());
+    assert!(!future_is_alive.get());
+    assert!(output_is_alive.get());
 }
 
 #[test]
@@ -321,7 +316,7 @@ fn task_multiple_wake() {
     sender.try_send(3).unwrap();
 
     // The task should have been scheduled by the channel sender.
-    assert_eq!(run_scheduled_runnable(), true);
+    assert!(run_scheduled_runnable());
     assert!(promise.poll().is_pending());
 
     // The channel should be empty. Wake the task 2 more times.
@@ -329,11 +324,11 @@ fn task_multiple_wake() {
     sender.try_send(5).unwrap();
 
     // The task should have been scheduled by the channel sender.
-    assert_eq!(run_scheduled_runnable(), true);
+    assert!(run_scheduled_runnable());
 
     // The task should have completed.
-    assert_eq!(future_is_alive.get(), false);
-    assert_eq!(output_is_alive.get(), true);
+    assert!(!future_is_alive.get());
+    assert!(output_is_alive.get());
     assert_eq!(promise.poll().map(|v| *v), Stage::Ready(15));
 }
 
@@ -401,13 +396,13 @@ fn task_cancel_scheduled() {
 
     // The future should not be dropped while the `Runnable` exists, even if the
     // task is cancelled, but the task should be seen as cancelled.
-    assert_eq!(future_is_alive.get(), true);
+    assert!(future_is_alive.get());
     assert!(promise.poll().is_cancelled());
 
     // An attempt to run the task should now drop the future without polling it.
     runnable.run();
-    assert_eq!(future_is_alive.get(), false);
-    assert_eq!(output_is_alive.get(), false);
+    assert!(!future_is_alive.get());
+    assert!(!output_is_alive.get());
 }
 
 #[test]
@@ -422,8 +417,8 @@ fn task_cancel_unscheduled() {
 
     let (promise, runnable, cancel_token) = spawn(future, schedule_runnable, ());
     runnable.run();
-    assert_eq!(future_is_alive.get(), true);
-    assert_eq!(output_is_alive.get(), false);
+    assert!(future_is_alive.get());
+    assert!(!output_is_alive.get());
 
     // Cancel the task while no `Runnable` exists (the task is not scheduled as
     // it needs to be woken by the channel sender first).
@@ -433,8 +428,8 @@ fn task_cancel_unscheduled() {
 
     // The future should be dropped immediately upon cancellation without
     // completing.
-    assert_eq!(future_is_alive.get(), false);
-    assert_eq!(output_is_alive.get(), false);
+    assert!(!future_is_alive.get());
+    assert!(!output_is_alive.get());
 }
 
 #[test]
@@ -445,12 +440,12 @@ fn task_cancel_completed() {
 
     let (promise, runnable, cancel_token) = spawn(future, schedule_runnable, ());
     runnable.run();
-    assert_eq!(future_is_alive.get(), false);
-    assert_eq!(output_is_alive.get(), true);
+    assert!(!future_is_alive.get());
+    assert!(output_is_alive.get());
 
     // Cancel the already completed task.
     cancel_token.cancel();
-    assert_eq!(output_is_alive.get(), true);
+    assert!(output_is_alive.get());
     assert_eq!(promise.poll().map(|v| *v), Stage::Ready(42));
 }
 
@@ -479,8 +474,8 @@ fn task_drop_promise_scheduled() {
 
     // The task should complete immediately when ran.
     runnable.run();
-    assert_eq!(future_is_alive.get(), false);
-    assert_eq!(output_is_alive.get(), true);
+    assert!(!future_is_alive.get());
+    assert!(output_is_alive.get());
 }
 
 #[test]
@@ -504,9 +499,9 @@ fn task_drop_promise_unscheduled() {
     assert!(sender.send(()).is_ok());
 
     // The task should have been scheduled by the channel sender.
-    assert_eq!(run_scheduled_runnable(), true);
-    assert_eq!(future_is_alive.get(), false);
-    assert_eq!(output_is_alive.get(), true);
+    assert!(run_scheduled_runnable());
+    assert!(!future_is_alive.get());
+    assert!(output_is_alive.get());
 }
 
 #[test]
@@ -538,9 +533,9 @@ fn task_drop_runnable() {
     assert!(sender.send(()).is_ok());
 
     // Drop the task scheduled by the channel sender.
-    assert_eq!(drop_runnable(), true);
-    assert_eq!(future_is_alive.get(), false);
-    assert_eq!(output_is_alive.get(), false);
+    assert!(drop_runnable());
+    assert!(!future_is_alive.get());
+    assert!(!output_is_alive.get());
     assert!(promise.poll().is_cancelled());
 }
 
diff --git a/nexosim/src/ports/output/broadcaster.rs b/nexosim/src/ports/output/broadcaster.rs
index 4da1d4a..0a2f9a4 100644
--- a/nexosim/src/ports/output/broadcaster.rs
+++ b/nexosim/src/ports/output/broadcaster.rs
@@ -672,9 +672,8 @@ mod tests {
 
         let th_broadcast = thread::spawn(move || {
             let iter = block_on(broadcaster.broadcast(MESSAGE)).unwrap();
-            let sum = iter.fold(0, |acc, val| acc + val);
 
-            sum
+            iter.sum::<usize>()
         });
 
         let th_recv: Vec<_> = mailboxes
@@ -727,11 +726,7 @@ mod tests {
 
                 // Send messages reaching only one receiver each.
                 for id in 0..N_RECV {
-                    sum += broadcaster
-                        .broadcast(id)
-                        .await
-                        .unwrap()
-                        .fold(0, |acc, val| acc + val);
+                    sum += broadcaster.broadcast(id).await.unwrap().sum::<usize>();
                 }
 
                 // Broadcast the special value to all receivers.
@@ -739,15 +734,11 @@ mod tests {
                     .broadcast(BROADCAST_ALL)
                     .await
                     .unwrap()
-                    .fold(0, |acc, val| acc + val);
+                    .sum::<usize>();
 
                 // Send again messages reaching only one receiver each.
                 for id in 0..N_RECV {
-                    sum += broadcaster
-                        .broadcast(id)
-                        .await
-                        .unwrap()
-                        .fold(0, |acc, val| acc + val);
+                    sum += broadcaster.broadcast(id).await.unwrap().sum::<usize>();
                 }
 
                 sum
diff --git a/nexosim/src/ports/source/broadcaster.rs b/nexosim/src/ports/source/broadcaster.rs
index 69c91ed..107b96a 100644
--- a/nexosim/src/ports/source/broadcaster.rs
+++ b/nexosim/src/ports/source/broadcaster.rs
@@ -567,9 +567,8 @@ mod tests {
 
         let th_broadcast = thread::spawn(move || {
             let iter = block_on(broadcaster.broadcast(MESSAGE)).unwrap();
-            let sum = iter.fold(0, |acc, val| acc + val);
 
-            sum
+            iter.sum::<usize>()
         });
 
         let th_recv: Vec<_> = mailboxes
@@ -622,11 +621,7 @@ mod tests {
 
                 // Send messages reaching only one receiver each.
                 for id in 0..N_RECV {
-                    sum += broadcaster
-                        .broadcast(id)
-                        .await
-                        .unwrap()
-                        .fold(0, |acc, val| acc + val);
+                    sum += broadcaster.broadcast(id).await.unwrap().sum::<usize>();
                 }
 
                 // Broadcast the special value to all receivers.
@@ -634,15 +629,11 @@ mod tests {
                     .broadcast(BROADCAST_ALL)
                     .await
                     .unwrap()
-                    .fold(0, |acc, val| acc + val);
+                    .sum::<usize>();
 
                 // Send again messages reaching only one receiver each.
                 for id in 0..N_RECV {
-                    sum += broadcaster
-                        .broadcast(id)
-                        .await
-                        .unwrap()
-                        .fold(0, |acc, val| acc + val);
+                    sum += broadcaster.broadcast(id).await.unwrap().sum::<usize>();
                 }
 
                 sum
diff --git a/nexosim/src/util/indexed_priority_queue.rs b/nexosim/src/util/indexed_priority_queue.rs
index 7b28ca5..c2d8967 100644
--- a/nexosim/src/util/indexed_priority_queue.rs
+++ b/nexosim/src/util/indexed_priority_queue.rs
@@ -649,14 +649,12 @@ mod tests {
         let delete_marked_fn =
             |queue: &mut IndexedPriorityQueue<u64, u64>,
              shadow_queue: &mut BTreeMap<(u64, usize), u64>| {
-                let success = match marked.take() {
-                    Some(delete_key) => Some(queue.extract(delete_key).is_some()),
-                    None => None,
-                };
-                let shadow_success = match shadow_marked.take() {
-                    Some(delete_key) => Some(shadow_queue.remove(&delete_key).is_some()),
-                    None => None,
-                };
+                let success = marked
+                    .take()
+                    .map(|delete_key| queue.extract(delete_key).is_some());
+                let shadow_success = shadow_marked
+                    .take()
+                    .map(|delete_key| shadow_queue.remove(&delete_key).is_some());
                 assert_eq!(success, shadow_success);
             };