diff --git a/actix-rt/CHANGES.md b/actix-rt/CHANGES.md
index 1bd5af9d..373640d3 100644
--- a/actix-rt/CHANGES.md
+++ b/actix-rt/CHANGES.md
@@ -1,7 +1,7 @@
 # Changes
 
 ## Unreleased - 2021-xx-xx
-* Add `io-uring` feature for enabling async file Io on linux system. [#374]
+* Add `io-uring` feature for enabling async file I/O on linux. [#374]
 * The `spawn` method can now resolve with non-unit outputs. [#369]
 
 [#369]: https://github.com/actix/actix-net/pull/369
diff --git a/actix-rt/Cargo.toml b/actix-rt/Cargo.toml
index d4d169c8..b466bb76 100644
--- a/actix-rt/Cargo.toml
+++ b/actix-rt/Cargo.toml
@@ -29,7 +29,7 @@ actix-macros = { version = "0.2.0", optional = true }
 futures-core = { version = "0.3", default-features = false }
 tokio = { version = "1.3", features = ["rt", "net", "parking_lot", "signal", "sync", "time"] }
 
-[target."cfg(target_os = \"linux\")".dependencies]
+[target.'cfg(target_os = "linux")'.dependencies]
 tokio-uring = { version = "0.1", optional = true }
 
 [dev-dependencies]
diff --git a/actix-rt/src/arbiter.rs b/actix-rt/src/arbiter.rs
index fed7eddb..0eb06a86 100644
--- a/actix-rt/src/arbiter.rs
+++ b/actix-rt/src/arbiter.rs
@@ -91,11 +91,11 @@ pub struct Arbiter {
 }
 
 impl Arbiter {
-    #[cfg(any(not(target_os = "linux"), not(feature = "io-uring")))]
     /// Spawn a new Arbiter thread and start its event loop.
     ///
     /// # Panics
     /// Panics if a [System] is not registered on the current thread.
+    #[cfg(any(not(target_os = "linux"), not(feature = "io-uring")))]
     #[allow(clippy::new_without_default)]
     pub fn new() -> Arbiter {
         Self::with_tokio_rt(|| {
@@ -104,10 +104,10 @@ impl Arbiter {
         })
     }
 
-    #[cfg(any(not(target_os = "linux"), not(feature = "io-uring")))]
     /// Spawn a new Arbiter using the [Tokio Runtime](tokio-runtime) returned from a closure.
     ///
     /// [tokio-runtime]: tokio::runtime::Runtime
+    #[cfg(any(not(target_os = "linux"), not(feature = "io-uring")))]
     #[doc(hidden)]
     pub fn with_tokio_rt<F>(runtime_factory: F) -> Arbiter
     where
@@ -159,11 +159,11 @@ impl Arbiter {
         Arbiter { tx, thread_handle }
     }
 
-    #[cfg(all(target_os = "linux", feature = "io-uring"))]
     /// Spawn a new Arbiter thread and start its event loop with `tokio-uring` runtime.
     ///
     /// # Panics
     /// Panics if a [System] is not registered on the current thread.
+    #[cfg(all(target_os = "linux", feature = "io-uring"))]
     #[allow(clippy::new_without_default)]
     pub fn new() -> Arbiter {
         let sys = System::current();
@@ -211,7 +211,7 @@ impl Arbiter {
         Arbiter { tx, thread_handle }
     }
 
-    /// Sets up an Arbiter runner in a new System using the provided runtime local task set.
+    /// Sets up an Arbiter runner in a new System using the environment's local set.
     pub(crate) fn in_new_system() -> ArbiterHandle {
         let (tx, rx) = mpsc::unbounded_channel();
 
diff --git a/actix-rt/src/lib.rs b/actix-rt/src/lib.rs
index 86bd2a8e..e078dd06 100644
--- a/actix-rt/src/lib.rs
+++ b/actix-rt/src/lib.rs
@@ -32,6 +32,10 @@
 //! arbiter.stop();
 //! arbiter.join().unwrap();
 //! ```
+//!
+//! # `io-uring` Support
+//! There is experimental support for using io-uring with this crate by enabling the
+//! `io-uring` feature. For now, it is semver exempt.
 
 #![deny(rust_2018_idioms, nonstandard_style)]
 #![allow(clippy::type_complexity)]
diff --git a/actix-rt/src/system.rs b/actix-rt/src/system.rs
index 796c7d74..4f262ede 100644
--- a/actix-rt/src/system.rs
+++ b/actix-rt/src/system.rs
@@ -54,7 +54,6 @@ impl System {
         let (sys_tx, sys_rx) = mpsc::unbounded_channel();
 
         let rt = Runtime::from(runtime_factory());
-
         let sys_arbiter = rt.block_on(async { Arbiter::in_new_system() });
         let system = System::construct(sys_tx, sys_arbiter.clone());
 
diff --git a/actix-rt/tests/tests.rs b/actix-rt/tests/tests.rs
index 63fb6ddf..a49a033b 100644
--- a/actix-rt/tests/tests.rs
+++ b/actix-rt/tests/tests.rs
@@ -328,39 +328,30 @@ fn spawn_local() {
 }
 
 #[cfg(all(target_os = "linux", feature = "io-uring"))]
-mod linux_only {
-    use std::sync::{
-        atomic::{AtomicBool, Ordering},
-        Arc,
-    };
+#[test]
+fn tokio_uring_arbiter() {
+    let system = System::new();
+    let (tx, rx) = std::sync::mpsc::channel();
 
-    use super::*;
+    Arbiter::new().spawn(async move {
+        let handle = actix_rt::spawn(async move {
+            let f = tokio_uring::fs::File::create("test.txt").await.unwrap();
+            let buf = b"Hello World!";
 
-    #[test]
-    fn tokio_uring_arbiter() {
-        let system = System::new();
-        let (tx, rx) = std::sync::mpsc::channel();
+            let (res, _) = f.write_at(&buf[..], 0).await;
+            assert!(res.is_ok());
 
-        Arbiter::new().spawn(async move {
-            let handle = actix_rt::spawn(async move {
-                let f = tokio_uring::fs::File::create("test.txt").await.unwrap();
-                let buf = b"Hello World!";
+            f.sync_all().await.unwrap();
+            f.close().await.unwrap();
 
-                let (res, _) = f.write_at(&buf[..], 0).await;
-                assert!(res.is_ok());
-
-                f.sync_all().await.unwrap();
-                f.close().await.unwrap();
-
-                std::fs::remove_file("test.txt").unwrap();
-            });
-
-            handle.await.unwrap();
-            tx.send(true).unwrap();
+            std::fs::remove_file("test.txt").unwrap();
         });
 
-        assert!(rx.recv().unwrap());
+        handle.await.unwrap();
+        tx.send(true).unwrap();
+    });
 
-        drop(system);
-    }
+    assert!(rx.recv().unwrap());
+
+    drop(system);
 }
diff --git a/actix-server/CHANGES.md b/actix-server/CHANGES.md
index 772982dd..08b4b553 100644
--- a/actix-server/CHANGES.md
+++ b/actix-server/CHANGES.md
@@ -3,7 +3,7 @@
 ## Unreleased - 2021-xx-xx
 * Remove `config` module. `ServiceConfig`, `ServiceRuntime` public types are removed due to this change. [#349]
 * Remove `ServerBuilder::configure` [#349]
-* Add `io-uring` feature for enabling async file Io on linux system. [#374]
+* Add `io-uring` feature for enabling async file I/O on linux. [#374]
 
 [#349]: https://github.com/actix/actix-net/pull/349
 [#374]: https://github.com/actix/actix-net/pull/374