diff --git a/tokio/tests/io_copy_bidirectional.rs b/tokio/tests/io_copy_bidirectional.rs
index 0ce7f85c5..0e82b29ea 100644
--- a/tokio/tests/io_copy_bidirectional.rs
+++ b/tokio/tests/io_copy_bidirectional.rs
@@ -26,7 +26,7 @@ async fn block_write(s: &mut TcpStream) -> usize {
             result = s.write(&BUF) => {
                 copied += result.expect("write error")
             },
-            _ = tokio::time::sleep(Duration::from_millis(100)) => {
+            _ = tokio::time::sleep(Duration::from_millis(10)) => {
                 break;
             }
         }
diff --git a/tokio/tests/macros_select.rs b/tokio/tests/macros_select.rs
index a089602cb..4da88fb5b 100644
--- a/tokio/tests/macros_select.rs
+++ b/tokio/tests/macros_select.rs
@@ -360,7 +360,21 @@ async fn use_future_in_if_condition() {
     use tokio::time::{self, Duration};
 
     tokio::select! {
-        _ = time::sleep(Duration::from_millis(50)), if false => {
+        _ = time::sleep(Duration::from_millis(10)), if false => {
+            panic!("if condition ignored")
+        }
+        _ = async { 1u32 } => {
+        }
+    }
+}
+
+#[tokio::test]
+async fn use_future_in_if_condition_biased() {
+    use tokio::time::{self, Duration};
+
+    tokio::select! {
+        biased;
+        _ = time::sleep(Duration::from_millis(10)), if false => {
             panic!("if condition ignored")
         }
         _ = async { 1u32 } => {
@@ -456,10 +470,7 @@ async fn require_mutable(_: &mut i32) {}
 async fn async_noop() {}
 
 async fn async_never() -> ! {
-    use tokio::time::Duration;
-    loop {
-        tokio::time::sleep(Duration::from_millis(10)).await;
-    }
+    futures::future::pending().await
 }
 
 // From https://github.com/tokio-rs/tokio/issues/2857
diff --git a/tokio/tests/named_pipe.rs b/tokio/tests/named_pipe.rs
index fd33203f8..2055c3ce5 100644
--- a/tokio/tests/named_pipe.rs
+++ b/tokio/tests/named_pipe.rs
@@ -126,7 +126,7 @@ async fn test_named_pipe_multi_client() -> io::Result<()> {
                 }
 
                 // Wait for a named pipe to become available.
-                time::sleep(Duration::from_millis(50)).await;
+                time::sleep(Duration::from_millis(10)).await;
             };
 
             let mut client = BufReader::new(client);
@@ -255,7 +255,7 @@ async fn test_named_pipe_multi_client_ready() -> io::Result<()> {
                 }
 
                 // Wait for a named pipe to become available.
-                time::sleep(Duration::from_millis(50)).await;
+                time::sleep(Duration::from_millis(10)).await;
             };
 
             let mut read_buf = [0u8; 5];
diff --git a/tokio/tests/no_rt.rs b/tokio/tests/no_rt.rs
index 8437b8046..6845850a4 100644
--- a/tokio/tests/no_rt.rs
+++ b/tokio/tests/no_rt.rs
@@ -26,7 +26,7 @@ fn panics_when_no_reactor() {
 
 async fn timeout_value() {
     let (_tx, rx) = oneshot::channel::<()>();
-    let dur = Duration::from_millis(20);
+    let dur = Duration::from_millis(10);
     let _ = timeout(dur, rx).await;
 }
 
diff --git a/tokio/tests/task_abort.rs b/tokio/tests/task_abort.rs
index cdaa405b8..fe6b50cd4 100644
--- a/tokio/tests/task_abort.rs
+++ b/tokio/tests/task_abort.rs
@@ -3,7 +3,7 @@
 
 use std::sync::Arc;
 use std::thread::sleep;
-use std::time::Duration;
+use tokio::time::Duration;
 
 use tokio::runtime::Builder;
 
@@ -28,11 +28,11 @@ fn test_abort_without_panic_3157() {
     rt.block_on(async move {
         let handle = tokio::spawn(async move {
             println!("task started");
-            tokio::time::sleep(std::time::Duration::new(100, 0)).await
+            tokio::time::sleep(Duration::new(100, 0)).await
         });
 
         // wait for task to sleep.
-        tokio::time::sleep(std::time::Duration::new(1, 0)).await;
+        tokio::time::sleep(Duration::from_millis(10)).await;
 
         handle.abort();
         let _ = handle.await;
@@ -138,7 +138,7 @@ fn remote_abort_local_set_3929() {
     });
 
     let jh2 = std::thread::spawn(move || {
-        sleep(Duration::from_millis(50));
+        sleep(Duration::from_millis(10));
         jh.abort();
     });
 
@@ -160,17 +160,17 @@ fn test_abort_wakes_task_3964() {
             // Make sure the Arc is moved into the task
             let _notify_dropped = notify_dropped;
             println!("task started");
-            tokio::time::sleep(std::time::Duration::new(100, 0)).await
+            tokio::time::sleep(Duration::new(100, 0)).await
         });
 
         // wait for task to sleep.
-        tokio::time::sleep(std::time::Duration::from_millis(10)).await;
+        tokio::time::sleep(Duration::from_millis(10)).await;
 
         handle.abort();
         drop(handle);
 
         // wait for task to abort.
-        tokio::time::sleep(std::time::Duration::from_millis(10)).await;
+        tokio::time::sleep(Duration::from_millis(10)).await;
 
         // Check that the Arc has been dropped.
         assert!(weak_notify_dropped.upgrade().is_none());
@@ -188,17 +188,17 @@ fn test_abort_task_that_panics_on_drop_contained() {
             // Make sure the Arc is moved into the task
             let _panic_dropped = PanicOnDrop;
             println!("task started");
-            tokio::time::sleep(std::time::Duration::new(100, 0)).await
+            tokio::time::sleep(Duration::new(100, 0)).await
         });
 
         // wait for task to sleep.
-        tokio::time::sleep(std::time::Duration::from_millis(10)).await;
+        tokio::time::sleep(Duration::from_millis(10)).await;
 
         handle.abort();
         drop(handle);
 
         // wait for task to abort.
-        tokio::time::sleep(std::time::Duration::from_millis(10)).await;
+        tokio::time::sleep(Duration::from_millis(10)).await;
     });
 }
 
@@ -212,11 +212,11 @@ fn test_abort_task_that_panics_on_drop_returned() {
             // Make sure the Arc is moved into the task
             let _panic_dropped = PanicOnDrop;
             println!("task started");
-            tokio::time::sleep(std::time::Duration::new(100, 0)).await
+            tokio::time::sleep(Duration::new(100, 0)).await
         });
 
         // wait for task to sleep.
-        tokio::time::sleep(std::time::Duration::from_millis(10)).await;
+        tokio::time::sleep(Duration::from_millis(10)).await;
 
         handle.abort();
         assert!(handle.await.unwrap_err().is_panic());
diff --git a/tokio/tests/task_local_set.rs b/tokio/tests/task_local_set.rs
index 58d510948..d1869e28e 100644
--- a/tokio/tests/task_local_set.rs
+++ b/tokio/tests/task_local_set.rs
@@ -67,11 +67,11 @@ async fn localset_future_timers() {
 
     let local = LocalSet::new();
     local.spawn_local(async move {
-        time::sleep(Duration::from_millis(10)).await;
+        time::sleep(Duration::from_millis(5)).await;
         RAN1.store(true, Ordering::SeqCst);
     });
     local.spawn_local(async move {
-        time::sleep(Duration::from_millis(20)).await;
+        time::sleep(Duration::from_millis(10)).await;
         RAN2.store(true, Ordering::SeqCst);
     });
     local.await;
@@ -299,9 +299,7 @@ fn drop_cancels_tasks() {
         let _rc2 = rc2;
 
         started_tx.send(()).unwrap();
-        loop {
-            time::sleep(Duration::from_secs(3600)).await;
-        }
+        futures::future::pending::<()>().await;
     });
 
     local.block_on(&rt, async {
@@ -416,7 +414,7 @@ async fn local_tasks_are_polled_after_tick() {
         .run_until(async {
             let task2 = task::spawn(async move {
                 // Wait a bit
-                time::sleep(Duration::from_millis(100)).await;
+                time::sleep(Duration::from_millis(10)).await;
 
                 let mut oneshots = Vec::with_capacity(EXPECTED);
 
@@ -427,13 +425,13 @@ async fn local_tasks_are_polled_after_tick() {
                     tx.send(oneshot_rx).unwrap();
                 }
 
-                time::sleep(Duration::from_millis(100)).await;
+                time::sleep(Duration::from_millis(10)).await;
 
                 for tx in oneshots.drain(..) {
                     tx.send(()).unwrap();
                 }
 
-                time::sleep(Duration::from_millis(300)).await;
+                time::sleep(Duration::from_millis(10)).await;
                 let rx1 = RX1.load(SeqCst);
                 let rx2 = RX2.load(SeqCst);
                 println!("EXPECT = {}; RX1 = {}; RX2 = {}", EXPECTED, rx1, rx2);
diff --git a/tokio/tests/tcp_into_split.rs b/tokio/tests/tcp_into_split.rs
index b4bb2eeb9..2e06643a0 100644
--- a/tokio/tests/tcp_into_split.rs
+++ b/tokio/tests/tcp_into_split.rs
@@ -116,7 +116,7 @@ async fn drop_write() -> Result<()> {
 
     // drop it while the read is in progress
     std::thread::spawn(move || {
-        thread::sleep(std::time::Duration::from_millis(50));
+        thread::sleep(std::time::Duration::from_millis(10));
         drop(write_half);
     });
 
diff --git a/tokio/tests/time_rt.rs b/tokio/tests/time_rt.rs
index 077534352..23367be41 100644
--- a/tokio/tests/time_rt.rs
+++ b/tokio/tests/time_rt.rs
@@ -13,7 +13,7 @@ fn timer_with_threaded_runtime() {
     let (tx, rx) = mpsc::channel();
 
     rt.spawn(async move {
-        let when = Instant::now() + Duration::from_millis(100);
+        let when = Instant::now() + Duration::from_millis(10);
 
         sleep_until(when).await;
         assert!(Instant::now() >= when);
@@ -32,7 +32,7 @@ fn timer_with_basic_scheduler() {
     let (tx, rx) = mpsc::channel();
 
     rt.block_on(async move {
-        let when = Instant::now() + Duration::from_millis(100);
+        let when = Instant::now() + Duration::from_millis(10);
 
         sleep_until(when).await;
         assert!(Instant::now() >= when);
@@ -67,7 +67,7 @@ async fn starving() {
         }
     }
 
-    let when = Instant::now() + Duration::from_millis(20);
+    let when = Instant::now() + Duration::from_millis(10);
     let starve = Starve(Box::pin(sleep_until(when)), 0);
 
     starve.await;
@@ -81,7 +81,7 @@ async fn timeout_value() {
     let (_tx, rx) = oneshot::channel::<()>();
 
     let now = Instant::now();
-    let dur = Duration::from_millis(20);
+    let dur = Duration::from_millis(10);
 
     let res = timeout(dur, rx).await;
     assert!(res.is_err());
diff --git a/tokio/tests/time_sleep.rs b/tokio/tests/time_sleep.rs
index e3e27b0c9..20477d26b 100644
--- a/tokio/tests/time_sleep.rs
+++ b/tokio/tests/time_sleep.rs
@@ -24,7 +24,7 @@ async fn immediate_sleep() {
 async fn is_elapsed() {
     time::pause();
 
-    let sleep = time::sleep(Duration::from_millis(50));
+    let sleep = time::sleep(Duration::from_millis(10));
 
     tokio::pin!(sleep);