diff --git a/src/test/ui/issues/issue-59020.rs b/src/test/ui/issues/issue-59020.rs
index e7544934da0..a2b11764a2f 100644
--- a/src/test/ui/issues/issue-59020.rs
+++ b/src/test/ui/issues/issue-59020.rs
@@ -1,7 +1,6 @@
 // edition:2018
 // run-pass
 // ignore-emscripten no threads support
-// ignore-sgx no thread sleep support
 
 use std::thread;
 use std::time::Duration;
diff --git a/src/test/ui/issues/issue-9396.rs b/src/test/ui/issues/issue-9396.rs
index 27b5185377d..3e7e9a51cdd 100644
--- a/src/test/ui/issues/issue-9396.rs
+++ b/src/test/ui/issues/issue-9396.rs
@@ -2,7 +2,6 @@
 #![allow(unused_must_use)]
 #![allow(deprecated)]
 // ignore-emscripten no threads support
-// ignore-sgx no thread sleep support
 
 use std::sync::mpsc::{TryRecvError, channel};
 use std::thread;
diff --git a/src/test/ui/mpsc_stress.rs b/src/test/ui/mpsc_stress.rs
index bce5fdcd119..81c000839bd 100644
--- a/src/test/ui/mpsc_stress.rs
+++ b/src/test/ui/mpsc_stress.rs
@@ -1,7 +1,6 @@
 // run-pass
 // compile-flags:--test
 // ignore-emscripten
-// ignore-sgx no thread sleep support
 
 use std::sync::mpsc::channel;
 use std::sync::mpsc::TryRecvError;
@@ -37,6 +36,7 @@ impl Barrier {
     fn wait(self) {
         self.shared.fetch_add(1, Ordering::SeqCst);
         while self.shared.load(Ordering::SeqCst) != self.count {
+            thread::yield_now();
         }
     }
 }
diff --git a/src/test/ui/sleep.rs b/src/test/ui/sleep.rs
index 757578b8475..3b3a4a4f325 100644
--- a/src/test/ui/sleep.rs
+++ b/src/test/ui/sleep.rs
@@ -1,6 +1,5 @@
 // run-pass
 // ignore-emscripten no threads support
-// ignore-sgx no thread sleep support
 
 use std::thread::{self, sleep};
 use std::time::Duration;
diff --git a/src/test/ui/tcp-stress.rs b/src/test/ui/tcp-stress.rs
index 1f1948fa8fa..08b47dc5318 100644
--- a/src/test/ui/tcp-stress.rs
+++ b/src/test/ui/tcp-stress.rs
@@ -4,7 +4,6 @@
 // ignore-emscripten no threads or sockets support
 // ignore-netbsd system ulimit (Too many open files)
 // ignore-openbsd system ulimit (Too many open files)
-// ignore-sgx no thread sleep support
 
 use std::io::prelude::*;
 use std::net::{TcpListener, TcpStream};