diff --git a/CHANGELOG.md b/CHANGELOG.md
index 90f7b45..038967e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,32 +6,16 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
-## [0.0.3] - 2026-03-04
+## [0.0.3] - 2026-01-11
 
 ### 🚀 Features
 
 - Remove closed flag from ChannelState
 - Add internal constructor for `Sucker`/`Sourcer`
-- Implement asynchronous channel support with tokio integration
 
 ### 🐛 Bug Fixes
 
 - Correct toolchain in flake
-
-### 🚜 Refactor
-
-- Move traits to sync module and update imports
-- Reorganize channel modules and implement async/sync structures
-
-### 🧪 Testing
-
-- Set_mut tests
-- Increase code coverage of failure paths
-
-### ⚙️ Miscellaneous Tasks
-
-- Remove unused traits module
-- Reorganize module exports for async and sync features
 ## [0.0.2] - 2025-09-04
 
 ### 🚀 Features
diff --git a/Cargo.toml b/Cargo.toml
index 49df714..db5ff2d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,24 +18,20 @@ thiserror = "2.0"
 flume = { version = "0.12", optional = true }
 crossbeam-channel = { version = "0.5", optional = true }
 arc-swap = "1.7.1"
-tokio = { version = "1.48", features = ["sync", "macros", "rt-multi-thread"], optional = true }
-async-trait = { version = "0.1", optional = true }
 
 [features]
 default = ["all"]
 
 sync = []
-async = ["dep:async-trait"]
+async = []
 
 sync-std = ["sync"]
 sync-flume = ["sync", "dep:flume"]
 sync-crossbeam = ["sync", "dep:crossbeam-channel"]
-async-tokio = ["async", "dep:tokio"]
 
 all-sync = ["sync-std", "sync-flume", "sync-crossbeam"]
-all-async = ["async-tokio"]
 
-all = ["all-sync", "all-async"]
+all = ["all-sync"]
 
 [lib]
 
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..02cb8fc
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,3 @@
+[toolchain]
+channel = "stable"
+profile = "default"
diff --git a/src/asynchronous/channel.rs b/src/asynchronous/channel.rs
deleted file mode 100644
index 532cac7..0000000
--- a/src/asynchronous/channel.rs
+++ /dev/null
@@ -1,196 +0,0 @@
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::sync::{Arc, Mutex};
-
-use crate::asynchronous::traits::{AsyncChannelReceiver, AsyncChannelSender};
-use crate::error::Error;
-use crate::types::{ChannelState, Request, Response, ValueSource};
-
-/// The consumer side of the channel that requests values asynchronously.
-pub struct AsyncSucker<T, ST, SR>
-where
-    ST: AsyncChannelSender<Request>,
-    SR: AsyncChannelReceiver<Response<T>>,
-{
-    request_tx: ST,
-    response_rx: SR,
-    closed: AtomicBool,
-    _phantom: std::marker::PhantomData<T>,
-}
-
-impl<T, ST, SR> AsyncSucker<T, ST, SR>
-where
-    ST: AsyncChannelSender<Request>,
-    SR: AsyncChannelReceiver<Response<T>>,
-{
-    pub(crate) fn new(request_tx: ST, response_rx: SR) -> Self {
-        Self {
-            request_tx,
-            response_rx,
-            closed: AtomicBool::new(false),
-            _phantom: std::marker::PhantomData,
-        }
-    }
-}
-
-/// The producer side of the channel that provides values asynchronously.
-pub struct AsyncSourcer<T, SR, ST>
-where
-    SR: AsyncChannelReceiver<Request>,
-    ST: AsyncChannelSender<Response<T>>,
-{
-    request_rx: SR,
-    response_tx: ST,
-    state: ChannelState<T>,
-    _phantom: std::marker::PhantomData<T>,
-}
-
-impl<T, SR, ST> AsyncSourcer<T, SR, ST>
-where
-    SR: AsyncChannelReceiver<Request>,
-    ST: AsyncChannelSender<Response<T>>,
-{
-    pub(crate) fn new(request_rx: SR, response_tx: ST, state: ChannelState<T>) -> Self {
-        Self {
-            request_rx,
-            response_tx,
-            state,
-            _phantom: std::marker::PhantomData,
-        }
-    }
-}
-
-impl<T, SR, ST> AsyncSourcer<T, SR, ST>
-where
-    T: Send + 'static,
-    SR: AsyncChannelReceiver<Request>,
-    ST: AsyncChannelSender<Response<T>>,
-{
-    pub fn set_static(&self, val: T) -> Result<(), Error>
-    where
-        T: Clone,
-    {
-        self.state.swap(Arc::new(ValueSource::Static {
-            val,
-            clone: T::clone,
-        }));
-        Ok(())
-    }
-
-    pub fn set<F>(&self, closure: F) -> Result<(), Error>
-    where
-        F: Fn() -> T + Send + Sync + 'static,
-    {
-        self.state
-            .swap(Arc::new(ValueSource::Dynamic(Box::new(closure))));
-        Ok(())
-    }
-
-    pub fn set_mut<F>(&self, closure: F) -> Result<(), Error>
-    where
-        F: FnMut() -> T + Send + Sync + 'static,
-    {
-        self.state
-            .swap(Arc::new(ValueSource::DynamicMut(Mutex::new(Box::new(
-                closure,
-            )))));
-        Ok(())
-    }
-
-    pub fn close(&self) -> Result<(), Error> {
-        self.state.swap(Arc::new(ValueSource::Cleared));
-        Ok(())
-    }
-
-    pub async fn run(self) -> Result<(), Error> {
-        loop {
-            match self.request_rx.recv().await {
-                Ok(Request::GetValue) => {
-                    let response = self.handle_get_value()?;
-                    if self.response_tx.send(response).await.is_err() {
-                        break;
-                    }
-                }
-                Ok(Request::Close) => {
-                    self.close()?;
-                    break;
-                }
-                Err(_) => break,
-            }
-        }
-        Ok(())
-    }
-
-    fn handle_get_value(&self) -> Result<Response<T>, Error> {
-        let state = self.state.load();
-
-        match &**state {
-            ValueSource::Static { val, clone } => {
-                let value = self.execute_closure_safely(&mut || clone(val));
-                match value {
-                    Ok(v) => Ok(Response::Value(v)),
-                    Err(_) => Ok(Response::NoSource),
-                }
-            }
-            ValueSource::Dynamic(closure) => {
-                let value = self.execute_closure_safely(&mut || closure());
-                match value {
-                    Ok(v) => Ok(Response::Value(v)),
-                    Err(_) => Ok(Response::NoSource),
-                }
-            }
-            ValueSource::DynamicMut(closure) => {
-                let mut closure = closure.lock().unwrap();
-                let value = self.execute_closure_safely(&mut *closure);
-                match value {
-                    Ok(v) => Ok(Response::Value(v)),
-                    Err(_) => Ok(Response::NoSource),
-                }
-            }
-            ValueSource::None => Ok(Response::NoSource),
-            ValueSource::Cleared => Ok(Response::Closed),
-        }
-    }
-
-    fn execute_closure_safely(
-        &self,
-        closure: &mut dyn FnMut() -> T,
-    ) -> Result<T, Box<dyn std::any::Any + Send>> {
-        std::panic::catch_unwind(std::panic::AssertUnwindSafe(closure))
-    }
-}
-
-impl<T, ST, SR> AsyncSucker<T, ST, SR>
-where
-    ST: AsyncChannelSender<Request>,
-    SR: AsyncChannelReceiver<Response<T>>,
-{
-    pub async fn get(&self) -> Result<T, Error> {
-        if self.closed.load(Ordering::Acquire) {
-            return Err(Error::ChannelClosed);
-        }
-
-        self.request_tx
-            .send(Request::GetValue)
-            .await
-            .map_err(|_| Error::ProducerDisconnected)?;
-
-        match self.response_rx.recv().await {
-            Ok(Response::Value(value)) => Ok(value),
-            Ok(Response::NoSource) => Err(Error::NoSource),
-            Ok(Response::Closed) => Err(Error::ChannelClosed),
-            Err(_) => Err(Error::ProducerDisconnected),
-        }
-    }
-
-    pub async fn is_closed(&self) -> bool {
-        self.request_tx.send(Request::GetValue).await.is_err()
-    }
-
-    pub async fn close(&self) -> Result<(), Error> {
-        self.closed.store(true, Ordering::Release);
-        self.request_tx
-            .send(Request::Close)
-            .await
-            .map_err(|_| Error::ProducerDisconnected)
-    }
-}
diff --git a/src/asynchronous/mod.rs b/src/asynchronous/mod.rs
deleted file mode 100644
index 6145b07..0000000
--- a/src/asynchronous/mod.rs
+++ /dev/null
@@ -1,8 +0,0 @@
-pub mod traits;
-pub mod channel;
-
-#[cfg(feature = "async-tokio")]
-pub mod tokio;
-
-#[cfg(feature = "async-tokio")]
-pub use tokio::TokioSuck;
diff --git a/src/asynchronous/tokio.rs b/src/asynchronous/tokio.rs
deleted file mode 100644
index 677b676..0000000
--- a/src/asynchronous/tokio.rs
+++ /dev/null
@@ -1,121 +0,0 @@
-use std::sync::Arc;
-
-use arc_swap::ArcSwap;
-use async_trait::async_trait;
-use tokio::sync::{Mutex, mpsc};
-
-use crate::asynchronous::traits::{
-    AsyncChannelReceiver, AsyncChannelSender, AsyncChannelType, ChannelError,
-};
-use crate::types;
-
-type TokioSucker<T> =
-    crate::asynchronous::channel::AsyncSucker<
-        T,
-        TokioSender<types::Request>,
-        TokioReceiver<types::Response<T>>,
-    >;
-type TokioSourcer<T> =
-    crate::asynchronous::channel::AsyncSourcer<
-        T,
-        TokioReceiver<types::Request>,
-        TokioSender<types::Response<T>>,
-    >;
-
-pub struct TokioSender<T>(mpsc::UnboundedSender<T>);
-pub struct TokioReceiver<T>(Mutex<mpsc::UnboundedReceiver<T>>);
-
-#[async_trait]
-impl<T: Send + 'static> AsyncChannelSender<T> for TokioSender<T> {
-    async fn send(&self, msg: T) -> Result<(), ChannelError> {
-        self.0
-            .send(msg)
-            .map_err(|_| ChannelError::ProducerDisconnected)
-    }
-}
-
-#[async_trait]
-impl<T: Send + 'static> AsyncChannelReceiver<T> for TokioReceiver<T> {
-    async fn recv(&self) -> Result<T, ChannelError> {
-        let mut receiver = self.0.lock().await;
-        receiver
-            .recv()
-            .await
-            .ok_or(ChannelError::ProducerDisconnected)
-    }
-}
-
-pub struct TokioChannel;
-
-impl AsyncChannelType for TokioChannel {
-    type Sender<T: Send + 'static> = TokioSender<T>;
-    type Receiver<T: Send + 'static> = TokioReceiver<T>;
-
-    fn create_request_channel() -> (Self::Sender<types::Request>, Self::Receiver<types::Request>) {
-        let (tx, rx) = mpsc::unbounded_channel();
-        (TokioSender(tx), TokioReceiver(Mutex::new(rx)))
-    }
-
-    fn create_response_channel<T: Send + 'static>() -> (
-        Self::Sender<types::Response<T>>,
-        Self::Receiver<types::Response<T>>,
-    ) {
-        let (tx, rx) = mpsc::unbounded_channel();
-        (TokioSender(tx), TokioReceiver(Mutex::new(rx)))
-    }
-}
-
-pub struct TokioSuck<T> {
-    _phantom: std::marker::PhantomData<T>,
-}
-
-impl<T> TokioSuck<T> {
-    pub fn pair() -> (TokioSucker<T>, TokioSourcer<T>)
-    where
-        T: Clone + Send + 'static,
-    {
-        let (request_tx, request_rx) = TokioChannel::create_request_channel();
-        let (response_tx, response_rx) = TokioChannel::create_response_channel::<T>();
-        let state = ArcSwap::new(Arc::new(crate::types::ValueSource::None));
-
-        let sucker = crate::asynchronous::channel::AsyncSucker::new(request_tx, response_rx);
-        let sourcer = crate::asynchronous::channel::AsyncSourcer::new(request_rx, response_tx, state);
-
-        (sucker, sourcer)
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::Error;
-
-    #[tokio::test]
-    async fn test_pre_computed_value() {
-        let (sucker, sourcer) = TokioSuck::<i32>::pair();
-
-        let producer = tokio::spawn(async move {
-            sourcer.set_static(42).unwrap();
-            sourcer.run().await.unwrap();
-        });
-
-        let value = sucker.get().await.unwrap();
-        assert_eq!(value, 42);
-        sucker.close().await.unwrap();
-        producer.await.unwrap();
-    }
-
-    #[tokio::test]
-    async fn test_no_source_error() {
-        let (sucker, sourcer) = TokioSuck::<i32>::pair();
-
-        let producer = tokio::spawn(async move {
-            sourcer.run().await.unwrap();
-        });
-
-        let result = sucker.get().await;
-        assert!(matches!(result, Err(Error::NoSource)));
-        sucker.close().await.unwrap();
-        producer.await.unwrap();
-    }
-}
diff --git a/src/asynchronous/traits.rs b/src/asynchronous/traits.rs
deleted file mode 100644
index 67b6ec3..0000000
--- a/src/asynchronous/traits.rs
+++ /dev/null
@@ -1,27 +0,0 @@
-use async_trait::async_trait;
-
-pub use crate::error::Error as ChannelError;
-
-#[async_trait]
-pub trait AsyncChannelSender<T>: Send + Sync {
-    async fn send(&self, msg: T) -> Result<(), ChannelError>;
-}
-
-#[async_trait]
-pub trait AsyncChannelReceiver<T>: Send + Sync {
-    async fn recv(&self) -> Result<T, ChannelError>;
-}
-
-pub trait AsyncChannelType {
-    type Sender<T: Send + 'static>: AsyncChannelSender<T>;
-    type Receiver<T: Send + 'static>: AsyncChannelReceiver<T>;
-
-    fn create_request_channel() -> (
-        Self::Sender<crate::types::Request>,
-        Self::Receiver<crate::types::Request>,
-    );
-    fn create_response_channel<T: Send + 'static>() -> (
-        Self::Sender<crate::types::Response<T>>,
-        Self::Receiver<crate::types::Response<T>>,
-    );
-}
diff --git a/src/sync/channel.rs b/src/channel.rs
similarity index 100%
rename from src/sync/channel.rs
rename to src/channel.rs
diff --git a/src/lib.rs b/src/lib.rs
index 120cbd7..867d924 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,17 +1,12 @@
 #![doc = include_str!("../README.md")]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
 
+pub mod channel;
 pub mod error;
 
-#[cfg(feature = "async")]
-pub mod asynchronous;
 #[cfg(feature = "sync")]
 pub mod sync;
-#[cfg(any(feature = "sync", feature = "async"))]
 pub mod types;
 
-#[cfg(feature = "async")]
-pub use asynchronous::channel::{AsyncSourcer, AsyncSucker};
-#[cfg(feature = "sync")]
-pub use sync::channel::{Sourcer, Sucker};
+pub use channel::{Sourcer, Sucker};
 pub use error::Error;
diff --git a/src/sync/crossbeam.rs b/src/sync/crossbeam.rs
index e5784b0..4e72624 100644
--- a/src/sync/crossbeam.rs
+++ b/src/sync/crossbeam.rs
@@ -7,17 +7,9 @@ use arc_swap::ArcSwap;
 use crossbeam_channel;
 
 type CrossbeamSucker<T> =
-    crate::sync::channel::Sucker<
-        T,
-        CrossbeamSender<types::Request>,
-        CrossbeamReceiver<types::Response<T>>,
-    >;
+    crate::Sucker<T, CrossbeamSender<types::Request>, CrossbeamReceiver<types::Response<T>>>;
 type CrossbeamSourcer<T> =
-    crate::sync::channel::Sourcer<
-        T,
-        CrossbeamReceiver<types::Request>,
-        CrossbeamSender<types::Response<T>>,
-    >;
+    crate::Sourcer<T, CrossbeamReceiver<types::Request>, CrossbeamSender<types::Response<T>>>;
 
 /// Internal sender type for crossbeam backend
 pub struct CrossbeamSender<T>(crossbeam_channel::Sender<T>);
@@ -75,8 +67,8 @@ impl<T> CrossbeamSuck<T> {
 
         let state = ArcSwap::new(Arc::new(crate::types::ValueSource::None));
 
-        let sucker = crate::sync::channel::Sucker::new(request_tx, response_rx);
-        let sourcer = crate::sync::channel::Sourcer::new(request_rx, response_tx, state);
+        let sucker = crate::Sucker::new(request_tx, response_rx);
+        let sourcer = crate::Sourcer::new(request_rx, response_tx, state);
 
         (sucker, sourcer)
     }
@@ -140,38 +132,6 @@ mod tests {
         producer_handle.join().unwrap();
     }
 
-    #[test]
-    fn test_mut_closure_value() {
-        let (sucker, sourcer) = CrossbeamSuck::<i32>::pair();
-
-        // Start producer
-        let producer_handle = std::thread::spawn(move || {
-            let mut count = 0;
-            sourcer
-                .set_mut(move || {
-                    count += 1;
-                    count
-                })
-                .unwrap();
-            sourcer.run().unwrap();
-        });
-
-        // Ensure consumer gets incrementing values from the mutable closure
-        let value1 = sucker.get().unwrap();
-        assert_eq!(value1, 1);
-
-        let value2 = sucker.get().unwrap();
-        assert_eq!(value2, 2);
-
-        let value3 = sucker.get().unwrap();
-        assert_eq!(value3, 3);
-
-        // Close consumer
-        sucker.close().unwrap();
-
-        producer_handle.join().unwrap();
-    }
-
     #[test]
     fn test_no_source_error() {
         let (sucker, sourcer) = CrossbeamSuck::<i32>::pair();
diff --git a/src/sync/flume.rs b/src/sync/flume.rs
index 816054b..78ec2a5 100644
--- a/src/sync/flume.rs
+++ b/src/sync/flume.rs
@@ -7,9 +7,9 @@ use arc_swap::ArcSwap;
 use flume;
 
 type FlumeSucker<T> =
-    crate::sync::channel::Sucker<T, FlumeSender<types::Request>, FlumeReceiver<types::Response<T>>>;
+    crate::Sucker<T, FlumeSender<types::Request>, FlumeReceiver<types::Response<T>>>;
 type FlumeSourcer<T> =
-    crate::sync::channel::Sourcer<T, FlumeReceiver<types::Request>, FlumeSender<types::Response<T>>>;
+    crate::Sourcer<T, FlumeReceiver<types::Request>, FlumeSender<types::Response<T>>>;
 
 /// Internal sender type for flume backend  
 pub struct FlumeSender<T>(flume::Sender<T>);
@@ -68,8 +68,8 @@ impl<T> FlumeSuck<T> {
         let state = Arc::new(crate::types::ValueSource::None);
         let state = ArcSwap::new(state);
 
-        let sucker = crate::sync::channel::Sucker::new(request_tx, response_rx);
-        let sourcer = crate::sync::channel::Sourcer::new(request_rx, response_tx, state);
+        let sucker = crate::Sucker::new(request_tx, response_rx);
+        let sourcer = crate::Sourcer::new(request_rx, response_tx, state);
 
         (sucker, sourcer)
     }
@@ -133,38 +133,6 @@ mod tests {
         producer_handle.join().unwrap();
     }
 
-    #[test]
-    fn test_mut_closure_value() {
-        let (sucker, sourcer) = FlumeSuck::<i32>::pair();
-
-        // Start producer
-        let producer_handle = std::thread::spawn(move || {
-            let mut count = 0;
-            sourcer
-                .set_mut(move || {
-                    count += 1;
-                    count
-                })
-                .unwrap();
-            sourcer.run().unwrap();
-        });
-
-        // Ensure consumer gets incrementing values from the mutable closure
-        let value1 = sucker.get().unwrap();
-        assert_eq!(value1, 1);
-
-        let value2 = sucker.get().unwrap();
-        assert_eq!(value2, 2);
-
-        let value3 = sucker.get().unwrap();
-        assert_eq!(value3, 3);
-
-        // Close consumer
-        sucker.close().unwrap();
-
-        producer_handle.join().unwrap();
-    }
-
     #[test]
     fn test_no_source_error() {
         let (sucker, sourcer) = FlumeSuck::<i32>::pair();
diff --git a/src/sync/mod.rs b/src/sync/mod.rs
index dd12595..8feab0d 100644
--- a/src/sync/mod.rs
+++ b/src/sync/mod.rs
@@ -1,5 +1,4 @@
 pub mod traits;
-pub mod channel;
 
 #[cfg(feature = "sync-crossbeam")]
 pub mod crossbeam;
diff --git a/src/sync/std.rs b/src/sync/std.rs
index cf2b06a..8184a2b 100644
--- a/src/sync/std.rs
+++ b/src/sync/std.rs
@@ -6,10 +6,8 @@ use std::sync::Arc;
 #[cfg(feature = "sync-std")]
 use std::sync::mpsc;
 
-type StdSucker<T> =
-    crate::sync::channel::Sucker<T, StdSender<types::Request>, StdReceiver<types::Response<T>>>;
-type StdSourcer<T> =
-    crate::sync::channel::Sourcer<T, StdReceiver<types::Request>, StdSender<types::Response<T>>>;
+type StdSucker<T> = crate::Sucker<T, StdSender<types::Request>, StdReceiver<types::Response<T>>>;
+type StdSourcer<T> = crate::Sourcer<T, StdReceiver<types::Request>, StdSender<types::Response<T>>>;
 
 /// Internal sender type for std backend
 pub struct StdSender<T>(mpsc::Sender<T>);
@@ -68,8 +66,8 @@ impl<T> StdSuck<T> {
         let state = Arc::new(crate::types::ValueSource::None);
         let state = ArcSwap::new(state);
 
-        let sucker = crate::sync::channel::Sucker::new(request_tx, response_rx);
-        let sourcer = crate::sync::channel::Sourcer::new(request_rx, response_tx, state);
+        let sucker = crate::Sucker::new(request_tx, response_rx);
+        let sourcer = crate::Sourcer::new(request_rx, response_tx, state);
 
         (sucker, sourcer)
     }
@@ -79,18 +77,8 @@ impl<T> StdSuck<T> {
 mod tests {
     use super::*;
     use crate::Error;
-    use crate::sync::traits::ChannelType;
     use std::thread;
 
-    #[derive(Debug)]
-    struct PanicOnClone;
-
-    impl Clone for PanicOnClone {
-        fn clone(&self) -> Self {
-            panic!("intentional panic from Clone");
-        }
-    }
-
     #[test]
     fn test_pre_computed_value() {
         let (sucker, sourcer) = StdSuck::<i32>::pair();
@@ -143,38 +131,6 @@ mod tests {
         producer_handle.join().unwrap();
     }
 
-    #[test]
-    fn test_mut_closure_value() {
-        let (sucker, sourcer) = StdSuck::<i32>::pair();
-
-        // Start producer
-        let producer_handle = std::thread::spawn(move || {
-            let mut count = 0;
-            sourcer
-                .set_mut(move || {
-                    count += 1;
-                    count
-                })
-                .unwrap();
-            sourcer.run().unwrap();
-        });
-
-        // Ensure consumer gets incrementing values from the mutable closure
-        let value1 = sucker.get().unwrap();
-        assert_eq!(value1, 1);
-
-        let value2 = sucker.get().unwrap();
-        assert_eq!(value2, 2);
-
-        let value3 = sucker.get().unwrap();
-        assert_eq!(value3, 3);
-
-        // Close consumer
-        sucker.close().unwrap();
-
-        producer_handle.join().unwrap();
-    }
-
     #[test]
     fn test_no_source_error() {
         let (sucker, sourcer) = StdSuck::<i32>::pair();
@@ -230,110 +186,6 @@ mod tests {
         let _ = producer_handle.join();
     }
 
-    #[test]
-    fn test_run_breaks_when_response_receiver_is_dropped() {
-        let (request_tx, request_rx) = StdChannel::create_request_channel();
-        let (response_tx, response_rx) = StdChannel::create_response_channel::<i32>();
-        drop(response_rx);
-
-        let state = Arc::new(crate::types::ValueSource::None);
-        let state = ArcSwap::new(state);
-        let sourcer = crate::sync::channel::Sourcer::new(request_rx, response_tx, state);
-        sourcer.set_static(42).unwrap();
-
-        let producer_handle = thread::spawn(move || sourcer.run().unwrap());
-
-        request_tx.send(crate::types::Request::GetValue).unwrap();
-
-        producer_handle.join().unwrap();
-    }
-
-    #[test]
-    fn test_run_breaks_when_request_sender_is_dropped() {
-        let (request_tx, request_rx) = StdChannel::create_request_channel();
-        let (response_tx, _response_rx) = StdChannel::create_response_channel::<i32>();
-        drop(request_tx);
-
-        let state = Arc::new(crate::types::ValueSource::None);
-        let state = ArcSwap::new(state);
-        let sourcer = crate::sync::channel::Sourcer::new(request_rx, response_tx, state);
-
-        sourcer.run().unwrap();
-    }
-
-    #[test]
-    fn test_static_source_panic_returns_no_source() {
-        let (sucker, sourcer) = StdSuck::<PanicOnClone>::pair();
-
-        let producer_handle = thread::spawn(move || {
-            sourcer.set_static(PanicOnClone).unwrap();
-            sourcer.run().unwrap();
-        });
-
-        let result = sucker.get();
-        assert!(matches!(result, Err(Error::NoSource)));
-
-        sucker.close().unwrap();
-        producer_handle.join().unwrap();
-    }
-
-    #[test]
-    fn test_dynamic_source_panic_returns_no_source() {
-        let (sucker, sourcer) = StdSuck::<i32>::pair();
-
-        let producer_handle = thread::spawn(move || {
-            sourcer
-                .set(|| -> i32 {
-                    panic!("intentional panic from Fn source");
-                })
-                .unwrap();
-            sourcer.run().unwrap();
-        });
-
-        let result = sucker.get();
-        assert!(matches!(result, Err(Error::NoSource)));
-
-        sucker.close().unwrap();
-        producer_handle.join().unwrap();
-    }
-
-    #[test]
-    fn test_dynamic_mut_source_panic_returns_no_source() {
-        let (sucker, sourcer) = StdSuck::<i32>::pair();
-
-        let producer_handle = thread::spawn(move || {
-            sourcer
-                .set_mut(|| -> i32 {
-                    panic!("intentional panic from FnMut source");
-                })
-                .unwrap();
-            sourcer.run().unwrap();
-        });
-
-        let result = sucker.get();
-        assert!(matches!(result, Err(Error::NoSource)));
-
-        sucker.close().unwrap();
-        producer_handle.join().unwrap();
-    }
-
-    #[test]
-    fn test_cleared_source_returns_channel_closed() {
-        let (sucker, sourcer) = StdSuck::<i32>::pair();
-
-        let producer_handle = thread::spawn(move || {
-            sourcer.set_static(42).unwrap();
-            sourcer.close().unwrap();
-            sourcer.run().unwrap();
-        });
-
-        let result = sucker.get();
-        assert!(matches!(result, Err(Error::ChannelClosed)));
-
-        sucker.close().unwrap();
-        producer_handle.join().unwrap();
-    }
-
     #[test]
     fn test_is_closed() {
         let (sucker, sourcer) = StdSuck::<i32>::pair();