diff --git a/examples/capy_stream_await.hpp b/examples/capy_stream_await.hpp
index ea9cf30..3edefb6 100644
--- a/examples/capy_stream_await.hpp
+++ b/examples/capy_stream_await.hpp
@@ -6,7 +6,7 @@
 
 class StreamIoAwaitable {
     public:
-    StreamIoAwaitable(cudaStream_t stream) : m_stream(stream) {}
+    explicit StreamIoAwaitable(cudaStream_t stream) : m_stream(stream) {}
 
     bool await_ready() const noexcept { return false; }
 
diff --git a/examples/capy_task.cpp b/examples/capy_task.cpp
index 652a365..319a648 100644
--- a/examples/capy_task.cpp
+++ b/examples/capy_task.cpp
@@ -27,7 +27,7 @@ template <boost::capy::Executor Ex>
 class VerboseExecutor {
 
     public:
-    VerboseExecutor(Ex& ex) : m_executor(&ex) {
+    explicit VerboseExecutor(Ex& ex) : m_executor(&ex) {
         static_assert(boost::capy::Executor<VerboseExecutor<Ex>>,
                       "VerboseExecutor should be a valid capy Executor");
     }
diff --git a/examples/capy_task_arena_executor.hpp b/examples/capy_task_arena_executor.hpp
index af0dbfc..ab1d3e6 100644
--- a/examples/capy_task_arena_executor.hpp
+++ b/examples/capy_task_arena_executor.hpp
@@ -7,7 +7,7 @@
 
 class TaskArenaContext : public boost::capy::execution_context {
     public:
-    TaskArenaContext(tbb::task_arena& arena) : m_arena(&arena) {}
+    explicit TaskArenaContext(tbb::task_arena& arena) : m_arena(&arena) {}
 
     void schedule(std::coroutine_handle<> h) const {
         m_arena->enqueue([h]() { h.resume(); });
@@ -23,7 +23,7 @@ class TaskArenaContext : public boost::capy::execution_context {
 class TaskArenaExecutor {
 
     public:
-    TaskArenaExecutor(TaskArenaContext& context) noexcept
+    explicit TaskArenaExecutor(TaskArenaContext& context) noexcept
         : m_context(&context) {
         static_assert(boost::capy::Executor<TaskArenaExecutor>,
                       "TaskArenaExecutor should be a valid capy Executor");
diff --git a/examples/exec_stream_await_sender.hpp b/examples/exec_stream_await_sender.hpp
index 76136e0..91ecd49 100644
--- a/examples/exec_stream_await_sender.hpp
+++ b/examples/exec_stream_await_sender.hpp
@@ -17,7 +17,8 @@ class stream_await_sender {
     using completion_signatures =
         stdexec::completion_signatures<stdexec::set_value_t(cudaError_t)>;
 
-    stream_await_sender(const cudaStream_t stream) : m_stream(stream) {}
+    explicit stream_await_sender(const cudaStream_t stream)
+        : m_stream(stream) {}
     stdexec::env<> get_env() const noexcept { return {}; }
 
     template <stdexec::receiver Receiver>
diff --git a/include/CoroutineTests/alien/algorithm.hpp b/include/CoroutineTests/alien/algorithm.hpp
index c74a842..bb301bd 100644
--- a/include/CoroutineTests/alien/algorithm.hpp
+++ b/include/CoroutineTests/alien/algorithm.hpp
@@ -57,7 +57,8 @@ class [[nodiscard]] Task {
     using scheduler_type = std::function<void(std::coroutine_handle<>)>;
 
     // Required by coroutines
-    Task(handle_type coroutine_handle) : m_coroutine(coroutine_handle) {}
+    explicit Task(handle_type coroutine_handle)
+        : m_coroutine(coroutine_handle) {}
     ~Task() {
         if (m_coroutine) {
             m_coroutine.destroy();
@@ -100,7 +101,7 @@ struct Task<ResultType>::promise_type {
     const auto& get_scheduler() const { return m_scheduler; }
 
     // Required by coroutines: create the object
-    Task get_return_object() { return {handle_type::from_promise(*this)}; }
+    Task get_return_object() { return Task{handle_type::from_promise(*this)}; }
     // Required by coroutines: suspend immediately on start (lazy execution)
     std::suspend_always initial_suspend() const noexcept { return {}; }
     // Required by coroutines: suspend on completion
diff --git a/include/CoroutineTests/alien/manual_algorithm.hpp b/include/CoroutineTests/alien/manual_algorithm.hpp
index 16b8d22..9d539cd 100644
--- a/include/CoroutineTests/alien/manual_algorithm.hpp
+++ b/include/CoroutineTests/alien/manual_algorithm.hpp
@@ -49,7 +49,8 @@ class [[nodiscard]] Task {
     using scheduler_type = std::function<void(std::coroutine_handle<>)>;
 
     // Required by coroutines
-    Task(handle_type coroutine_handle) : m_coroutine(coroutine_handle) {}
+    explicit Task(handle_type coroutine_handle)
+        : m_coroutine(coroutine_handle) {}
     ~Task() {
         if (m_coroutine) {
             m_coroutine.destroy();
@@ -100,7 +101,7 @@ struct Task<ResultType>::promise_type {
     const auto& get_scheduler() const { return m_scheduler; }
 
     // Required by coroutines: create the object
-    Task get_return_object() { return {handle_type::from_promise(*this)}; }
+    Task get_return_object() { return Task{handle_type::from_promise(*this)}; }
     // Required by coroutines: suspend immediately on start (lazy execution)
     std::suspend_always initial_suspend() const noexcept { return {}; }
     // Required by coroutines: suspend on completion
diff --git a/include/CoroutineTests/alien/schedule_on.hpp b/include/CoroutineTests/alien/schedule_on.hpp
index b4f4b41..bac0b28 100644
--- a/include/CoroutineTests/alien/schedule_on.hpp
+++ b/include/CoroutineTests/alien/schedule_on.hpp
@@ -34,7 +34,8 @@ class [[nodiscard]] Task {
         std::coroutine_handle<promise_type>;  // not required but useful
 
     // Constructor from coroutine handle
-    Task(handle_type coroutine_handle) : m_coroutine(coroutine_handle) {}
+    explicit Task(handle_type coroutine_handle)
+        : m_coroutine(coroutine_handle) {}
     ~Task() {
         if (m_coroutine) {
             m_coroutine.destroy();
@@ -122,7 +123,7 @@ struct Task<ResultType>::promise_type
     void reschedule() { m_scheduler(handle_type::from_promise(*this)); }
 
     // Required by coroutines: create the object
-    Task get_return_object() { return {handle_type::from_promise(*this)}; }
+    Task get_return_object() { return Task{handle_type::from_promise(*this)}; }
     // Required by coroutines: suspend immediately on start (lazy execution)
     std::suspend_always initial_suspend() const { return {}; }
     // Required by coroutines: handle completion and resume parent
diff --git a/include/CoroutineTests/alien/subtool.hpp b/include/CoroutineTests/alien/subtool.hpp
index 43a18e8..d229dc9 100644
--- a/include/CoroutineTests/alien/subtool.hpp
+++ b/include/CoroutineTests/alien/subtool.hpp
@@ -67,7 +67,8 @@ class [[nodiscard]] Task {
         std::coroutine_handle<promise_type>;  // not required but useful
 
     // Constructor from coroutine handle
-    Task(handle_type coroutine_handle) : m_coroutine(coroutine_handle) {}
+    explicit Task(handle_type coroutine_handle)
+        : m_coroutine(coroutine_handle) {}
     ~Task() {
         if (m_coroutine) {
             m_coroutine.destroy();
@@ -145,7 +146,7 @@ struct Task<ResultType>::promise_type
     void reschedule() { m_scheduler(handle_type::from_promise(*this)); }
 
     // Required by coroutines: create the object
-    Task get_return_object() { return {handle_type::from_promise(*this)}; }
+    Task get_return_object() { return Task{handle_type::from_promise(*this)}; }
     // Required by coroutines: suspend immediately on start (lazy execution)
     std::suspend_always initial_suspend() const { return {}; }
     // Required by coroutines: handle completion and resume parent
diff --git a/include/CoroutineTests/alien/tool.hpp b/include/CoroutineTests/alien/tool.hpp
index 4e4b033..8b7c29a 100644
--- a/include/CoroutineTests/alien/tool.hpp
+++ b/include/CoroutineTests/alien/tool.hpp
@@ -67,7 +67,8 @@ class [[nodiscard]] Task {
         std::coroutine_handle<promise_type>;  // not required but useful
 
     // Constructor from coroutine handle
-    Task(handle_type coroutine_handle) : m_coroutine(coroutine_handle) {}
+    explicit Task(handle_type coroutine_handle)
+        : m_coroutine(coroutine_handle) {}
     ~Task() {
         if (m_coroutine) {
             m_coroutine.destroy();
@@ -145,7 +146,7 @@ struct Task<ResultType>::promise_type
     void reschedule() { m_scheduler(handle_type::from_promise(*this)); }
 
     // Required by coroutines: create the object
-    Task get_return_object() { return {handle_type::from_promise(*this)}; }
+    Task get_return_object() { return Task{handle_type::from_promise(*this)}; }
     // Required by coroutines: suspend immediately on start (lazy execution)
     std::suspend_always initial_suspend() const { return {}; }
     // Required by coroutines: handle completion and resume parent
diff --git a/include/CoroutineTests/async.hpp b/include/CoroutineTests/async.hpp
index ec6f505..6120397 100644
--- a/include/CoroutineTests/async.hpp
+++ b/include/CoroutineTests/async.hpp
@@ -15,7 +15,7 @@ class [[nodiscard]] Async {
     using handle_type =
         std::coroutine_handle<promise_type>;  // not required but useful
 
-    Async(handle_type coroutine_handle)
+    explicit Async(handle_type coroutine_handle)
         : m_coroutine(coroutine_handle) {}  // required by coroutines
     ~Async() {
         if (m_coroutine) {
@@ -71,7 +71,7 @@ struct Async::promise_type {
     }
     // required by coroutines
     Async get_return_object() {
-        return {Async::handle_type::from_promise(*this)};
+        return Async{Async::handle_type::from_promise(*this)};
     }
     // called on coroutine start
     std::suspend_always initial_suspend() const { return {}; }
diff --git a/include/CoroutineTests/datasink.hpp b/include/CoroutineTests/datasink.hpp
index ff19e81..1c60276 100644
--- a/include/CoroutineTests/datasink.hpp
+++ b/include/CoroutineTests/datasink.hpp
@@ -14,7 +14,7 @@ class [[nodiscard]] DataSink {
     using handle_type =
         std::coroutine_handle<promise_type>;  // not required but useful
 
-    DataSink(handle_type coroutine_handle)
+    explicit DataSink(handle_type coroutine_handle)
         : m_coroutine(coroutine_handle) {}  // required by coroutines
     ~DataSink() {
         if (m_coroutine) {
@@ -61,7 +61,7 @@ struct DataSink<T>::promise_type {
 
     // required by coroutines
     DataSink get_return_object() {
-        return {DataSink::handle_type::from_promise(*this)};
+        return DataSink{DataSink::handle_type::from_promise(*this)};
     }
     // called on coroutine start
     // resume immediately and proceed to first co_await
diff --git a/include/CoroutineTests/datasource.hpp b/include/CoroutineTests/datasource.hpp
index eaf415a..edf679a 100644
--- a/include/CoroutineTests/datasource.hpp
+++ b/include/CoroutineTests/datasource.hpp
@@ -17,7 +17,7 @@ class [[nodiscard]] DataSource {
     using handle_type =
         std::coroutine_handle<promise_type>;  // not required but useful
 
-    DataSource(handle_type coroutine_handle)
+    explicit DataSource(handle_type coroutine_handle)
         : m_coroutine(coroutine_handle) {}  // required by coroutines
     ~DataSource() {
         if (m_coroutine) {
@@ -68,7 +68,7 @@ struct DataSource<T>::promise_type {
 
     // required by coroutines
     DataSource get_return_object() {
-        return {DataSource::handle_type::from_promise(*this)};
+        return DataSource{DataSource::handle_type::from_promise(*this)};
     }
     // called on coroutine start
     std::suspend_always initial_suspend() const { return {}; }
@@ -85,7 +85,7 @@ struct DataSource<T>::promise_type {
 // This could be potentially replaced by just co_yield
 template <typename T>
 struct OutputAwaiter {
-    OutputAwaiter(T value) : m_value(value) {}
+    explicit OutputAwaiter(T value) : m_value(value) {}
     T m_value;
     // don't resume immediately
     bool await_ready() const { return false; }
diff --git a/include/CoroutineTests/generator.hpp b/include/CoroutineTests/generator.hpp
index bf774c9..b93c74c 100644
--- a/include/CoroutineTests/generator.hpp
+++ b/include/CoroutineTests/generator.hpp
@@ -18,7 +18,7 @@ class [[nodiscard]] Generator
     using handle_type =
         std::coroutine_handle<promise_type>;  // not required but useful
 
-    Generator(handle_type coroutine_handle)
+    explicit Generator(handle_type coroutine_handle)
         : m_coroutine(coroutine_handle) {}  // required by coroutines
     ~Generator() {
         if (m_coroutine) {
@@ -61,8 +61,8 @@ struct Generator<T>::promise_type {
     T m_current_value;
     std::exception_ptr m_exception;
     // required by coroutines
-    Generator<T> get_return_object() {
-        return {Generator<T>::handle_type::from_promise(*this)};
+    Generator get_return_object() {
+        return Generator{Generator<T>::handle_type::from_promise(*this)};
     }
     // called on coroutine start
     std::suspend_always initial_suspend() const { return {}; }
diff --git a/include/CoroutineTests/lazy.hpp b/include/CoroutineTests/lazy.hpp
index fb2ba8e..85b1fe8 100644
--- a/include/CoroutineTests/lazy.hpp
+++ b/include/CoroutineTests/lazy.hpp
@@ -17,7 +17,7 @@ class [[nodiscard]] MaybeLazy {
     using handle_type =
         std::coroutine_handle<promise_type>;  // not required but useful
 
-    MaybeLazy(handle_type coroutine_handle)
+    explicit MaybeLazy(handle_type coroutine_handle)
         : m_coroutine(coroutine_handle) {}  // required by coroutines
     ~MaybeLazy() {
         if (m_coroutine) {
@@ -61,8 +61,8 @@ struct MaybeLazy<T, is_lazy>::promise_type {
     T m_current_value;
     std::exception_ptr m_exception;
     // required by coroutines
-    MaybeLazy<T, is_lazy> get_return_object() {
-        return {MaybeLazy<T, is_lazy>::handle_type::from_promise(*this)};
+    MaybeLazy get_return_object() {
+        return MaybeLazy{MaybeLazy::handle_type::from_promise(*this)};
     }
     // called on coroutine start
     auto initial_suspend() const {
diff --git a/include/CoroutineTests/nestabletask.hpp b/include/CoroutineTests/nestabletask.hpp
index 28db10f..086213e 100644
--- a/include/CoroutineTests/nestabletask.hpp
+++ b/include/CoroutineTests/nestabletask.hpp
@@ -14,7 +14,7 @@ class [[nodiscard]] NestableTask {
     using handle_type =
         std::coroutine_handle<promise_type>;  // not required but useful
 
-    NestableTask(handle_type coroutine_handle)
+    explicit NestableTask(handle_type coroutine_handle)
         : m_coroutine(coroutine_handle) {}  // required by coroutines
     ~NestableTask() {
         if (m_coroutine) {
@@ -62,7 +62,7 @@ struct NestableTask::promise_type {
     handle_type m_parent;
     // required by coroutines
     NestableTask get_return_object() {
-        return {NestableTask::handle_type::from_promise(*this)};
+        return NestableTask{NestableTask::handle_type::from_promise(*this)};
     }
     // called on coroutine start
     std::suspend_always initial_suspend() const { return {}; }
diff --git a/include/CoroutineTests/pingpong.hpp b/include/CoroutineTests/pingpong.hpp
index 6c3a108..bc9b2fb 100644
--- a/include/CoroutineTests/pingpong.hpp
+++ b/include/CoroutineTests/pingpong.hpp
@@ -11,7 +11,7 @@ class [[nodiscard]] Player {
     using handle_type =
         std::coroutine_handle<promise_type>;  // not required but useful
 
-    Player(handle_type coroutine_handle)
+    explicit Player(handle_type coroutine_handle)
         : m_coroutine(coroutine_handle) {}  // required by coroutines
     ~Player() {
         if (m_coroutine) {
@@ -54,7 +54,7 @@ struct Player::promise_type {
     handle_type m_peer;
     // required by coroutines
     Player get_return_object() {
-        return {Player::handle_type::from_promise(*this)};
+        return Player{Player::handle_type::from_promise(*this)};
     }
     // called on coroutine start
     std::suspend_always initial_suspend() const { return {}; }
diff --git a/include/CoroutineTests/simplegenerator.hpp b/include/CoroutineTests/simplegenerator.hpp
index 9881b54..f029854 100644
--- a/include/CoroutineTests/simplegenerator.hpp
+++ b/include/CoroutineTests/simplegenerator.hpp
@@ -14,7 +14,7 @@ class [[nodiscard]] SimpleGenerator {
     using handle_type =
         std::coroutine_handle<promise_type>;  // not required but useful
 
-    SimpleGenerator(handle_type coroutine_handle)
+    explicit SimpleGenerator(handle_type coroutine_handle)
         : m_coroutine(coroutine_handle) {}  // required by coroutines
     ~SimpleGenerator() {
         if (m_coroutine) {
@@ -64,7 +64,8 @@ struct SimpleGenerator<T>::promise_type {
     T m_value{};
     // required by coroutines
     SimpleGenerator get_return_object() {
-        return {SimpleGenerator::handle_type::from_promise(*this)};
+        return SimpleGenerator{
+            SimpleGenerator::handle_type::from_promise(*this)};
     }
     // called on coroutine start
     std::suspend_always initial_suspend() const { return {}; }
diff --git a/include/CoroutineTests/task.hpp b/include/CoroutineTests/task.hpp
index 9f59268..c0b9546 100644
--- a/include/CoroutineTests/task.hpp
+++ b/include/CoroutineTests/task.hpp
@@ -13,7 +13,7 @@ class [[nodiscard]] Task {
     using handle_type =
         std::coroutine_handle<promise_type>;  // not required but useful
 
-    Task(handle_type coroutine_handle)
+    explicit Task(handle_type coroutine_handle)
         : m_coroutine(coroutine_handle) {}  // required by coroutines
     ~Task() {
         if (m_coroutine) {
@@ -50,7 +50,7 @@ struct Task::promise_type {
     std::exception_ptr m_exception;
     // required by coroutines
     Task get_return_object() {
-        return {Task::handle_type::from_promise(*this)};
+        return Task{Task::handle_type::from_promise(*this)};
     }
     // called on coroutine start
     std::suspend_always initial_suspend() const { return {}; }