diff --git a/tokio/src/runtime/coop.rs b/tokio/src/runtime/coop.rs
index d94b940d475..15a4d98c08d 100644
--- a/tokio/src/runtime/coop.rs
+++ b/tokio/src/runtime/coop.rs
@@ -246,18 +246,14 @@ cfg_coop! {
 mod test {
     use super::*;
 
-    cfg_is_wasm_not_wasi! {
-        use wasm_bindgen_test::wasm_bindgen_test as test;
-    }
-
-    #[cfg(not(all(target_family = "wasm", not(target_os = "wasi"))))]
-    use std::prelude::v1::test;
+    #[cfg(all(target_family = "wasm", not(target_os = "wasi")))]
+    use wasm_bindgen_test::wasm_bindgen_test as test;
 
     fn get() -> Budget {
         context::budget(|cell| cell.get()).unwrap_or(Budget::unconstrained())
     }
 
-    #[self::test]
+    #[test]
     fn budgeting() {
         use futures::future::poll_fn;
         use tokio_test::*;
diff --git a/tokio/src/sync/tests/atomic_waker.rs b/tokio/src/sync/tests/atomic_waker.rs
index acd81ac0656..989175a53a9 100644
--- a/tokio/src/sync/tests/atomic_waker.rs
+++ b/tokio/src/sync/tests/atomic_waker.rs
@@ -12,14 +12,10 @@ impl AssertSync for AtomicWaker {}
 impl AssertSend for Waker {}
 impl AssertSync for Waker {}
 
-cfg_is_wasm_not_wasi! {
-    use wasm_bindgen_test::wasm_bindgen_test as test;
-}
-
-#[cfg(not(all(target_family = "wasm", not(target_os = "wasi"))))]
-use std::prelude::v1::test;
+#[cfg(all(target_family = "wasm", not(target_os = "wasi")))]
+use wasm_bindgen_test::wasm_bindgen_test as test;
 
-#[self::test]
+#[test]
 fn basic_usage() {
     let mut waker = task::spawn(AtomicWaker::new());
 
@@ -29,7 +25,7 @@ fn basic_usage() {
     assert!(waker.is_woken());
 }
 
-#[self::test]
+#[test]
 fn wake_without_register() {
     let mut waker = task::spawn(AtomicWaker::new());
     waker.wake();
@@ -40,7 +36,7 @@ fn wake_without_register() {
     assert!(!waker.is_woken());
 }
 
-#[self::test]
+#[test]
 #[cfg(not(target_family = "wasm"))] // wasm currently doesn't support unwinding
 fn atomic_waker_panic_safe() {
     use std::panic;
diff --git a/tokio/src/sync/tests/notify.rs b/tokio/src/sync/tests/notify.rs
index 3b48bd8929d..323b5c65ae3 100644
--- a/tokio/src/sync/tests/notify.rs
+++ b/tokio/src/sync/tests/notify.rs
@@ -3,14 +3,10 @@ use std::future::Future;
 use std::sync::Arc;
 use std::task::{Context, RawWaker, RawWakerVTable, Waker};
 
-cfg_is_wasm_not_wasi! {
-    use wasm_bindgen_test::wasm_bindgen_test as test;
-}
-
-#[cfg(not(all(target_family = "wasm", not(target_os = "wasi"))))]
-use std::prelude::v1::test;
+#[cfg(all(target_family = "wasm", not(target_os = "wasi")))]
+use wasm_bindgen_test::wasm_bindgen_test as test;
 
-#[self::test]
+#[test]
 fn notify_clones_waker_before_lock() {
     const VTABLE: &RawWakerVTable = &RawWakerVTable::new(clone_w, wake, wake_by_ref, drop_w);
 
@@ -50,7 +46,7 @@ fn notify_clones_waker_before_lock() {
 }
 
 #[cfg(panic = "unwind")]
-#[self::test]
+#[test]
 fn notify_waiters_handles_panicking_waker() {
     use futures::task::ArcWake;
 
@@ -88,7 +84,7 @@ fn notify_waiters_handles_panicking_waker() {
     }
 }
 
-#[self::test]
+#[test]
 fn notify_simple() {
     let notify = Notify::new();
 
@@ -104,7 +100,7 @@ fn notify_simple() {
     assert!(fut2.poll().is_ready());
 }
 
-#[self::test]
+#[test]
 #[cfg(not(target_family = "wasm"))]
 fn watch_test() {
     let rt = crate::runtime::Builder::new_current_thread()
diff --git a/tokio/src/sync/tests/semaphore_batch.rs b/tokio/src/sync/tests/semaphore_batch.rs
index 6c8fd2f74c6..391797b3f66 100644
--- a/tokio/src/sync/tests/semaphore_batch.rs
+++ b/tokio/src/sync/tests/semaphore_batch.rs
@@ -3,14 +3,10 @@ use tokio_test::*;
 
 const MAX_PERMITS: usize = crate::sync::Semaphore::MAX_PERMITS;
 
-cfg_is_wasm_not_wasi! {
-    use wasm_bindgen_test::wasm_bindgen_test as test;
-}
-
-#[cfg(not(all(target_family = "wasm", not(target_os = "wasi"))))]
-use std::prelude::v1::test;
+#[cfg(all(target_family = "wasm", not(target_os = "wasi")))]
+use wasm_bindgen_test::wasm_bindgen_test as test;
 
-#[self::test]
+#[test]
 fn poll_acquire_one_available() {
     let s = Semaphore::new(100);
     assert_eq!(s.available_permits(), 100);
@@ -20,7 +16,7 @@ fn poll_acquire_one_available() {
     assert_eq!(s.available_permits(), 99);
 }
 
-#[self::test]
+#[test]
 fn poll_acquire_many_available() {
     let s = Semaphore::new(100);
     assert_eq!(s.available_permits(), 100);
@@ -33,7 +29,7 @@ fn poll_acquire_many_available() {
     assert_eq!(s.available_permits(), 90);
 }
 
-#[self::test]
+#[test]
 fn try_acquire_one_available() {
     let s = Semaphore::new(100);
     assert_eq!(s.available_permits(), 100);
@@ -45,7 +41,7 @@ fn try_acquire_one_available() {
     assert_eq!(s.available_permits(), 98);
 }
 
-#[self::test]
+#[test]
 fn try_acquire_many_available() {
     let s = Semaphore::new(100);
     assert_eq!(s.available_permits(), 100);
@@ -57,7 +53,7 @@ fn try_acquire_many_available() {
     assert_eq!(s.available_permits(), 90);
 }
 
-#[self::test]
+#[test]
 fn poll_acquire_one_unavailable() {
     let s = Semaphore::new(1);
 
@@ -81,7 +77,7 @@ fn poll_acquire_one_unavailable() {
     assert_eq!(s.available_permits(), 1);
 }
 
-#[self::test]
+#[test]
 fn poll_acquire_many_unavailable() {
     let s = Semaphore::new(5);
 
@@ -118,7 +114,7 @@ fn poll_acquire_many_unavailable() {
     assert_ready_ok!(acquire_3.poll());
 }
 
-#[self::test]
+#[test]
 fn try_acquire_one_unavailable() {
     let s = Semaphore::new(1);
 
@@ -137,7 +133,7 @@ fn try_acquire_one_unavailable() {
     assert_eq!(s.available_permits(), 1);
 }
 
-#[self::test]
+#[test]
 fn try_acquire_many_unavailable() {
     let s = Semaphore::new(5);
 
@@ -159,7 +155,7 @@ fn try_acquire_many_unavailable() {
     assert_eq!(s.available_permits(), 2);
 }
 
-#[self::test]
+#[test]
 fn poll_acquire_one_zero_permits() {
     let s = Semaphore::new(0);
     assert_eq!(s.available_permits(), 0);
@@ -174,19 +170,19 @@ fn poll_acquire_one_zero_permits() {
     assert_ready_ok!(acquire.poll());
 }
 
-#[self::test]
+#[test]
 fn max_permits_doesnt_panic() {
     Semaphore::new(MAX_PERMITS);
 }
 
-#[self::test]
+#[test]
 #[should_panic]
 #[cfg(not(target_family = "wasm"))] // wasm currently doesn't support unwinding
 fn validates_max_permits() {
     Semaphore::new(MAX_PERMITS + 1);
 }
 
-#[self::test]
+#[test]
 fn close_semaphore_prevents_acquire() {
     let s = Semaphore::new(5);
     s.close();
@@ -200,7 +196,7 @@ fn close_semaphore_prevents_acquire() {
     assert_eq!(5, s.available_permits());
 }
 
-#[self::test]
+#[test]
 fn close_semaphore_notifies_permit1() {
     let s = Semaphore::new(0);
     let mut acquire = task::spawn(s.acquire(1));
@@ -213,7 +209,7 @@ fn close_semaphore_notifies_permit1() {
     assert_ready_err!(acquire.poll());
 }
 
-#[self::test]
+#[test]
 fn close_semaphore_notifies_permit2() {
     let s = Semaphore::new(2);
 
@@ -247,7 +243,7 @@ fn close_semaphore_notifies_permit2() {
     assert_eq!(2, s.available_permits());
 }
 
-#[self::test]
+#[test]
 fn cancel_acquire_releases_permits() {
     let s = Semaphore::new(10);
     s.try_acquire(4).expect("uncontended try_acquire succeeds");
@@ -263,7 +259,7 @@ fn cancel_acquire_releases_permits() {
     assert_ok!(s.try_acquire(6));
 }
 
-#[self::test]
+#[test]
 fn release_permits_at_drop() {
     use crate::sync::semaphore::*;
     use futures::task::ArcWake;