diff --git a/src/test/compile-fail/issue-17718-static-sync.rs b/src/test/compile-fail/issue-17718-static-sync.rs
index 394a9cc69bee..fa8035a79652 100644
--- a/src/test/compile-fail/issue-17718-static-sync.rs
+++ b/src/test/compile-fail/issue-17718-static-sync.rs
@@ -8,12 +8,15 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::marker;
+#![feature(optin_builtin_traits)]
 
-struct Foo { marker: marker::NoSync }
+use std::marker::Sync;
+
+struct Foo;
+impl !Sync for Foo {}
 
 static FOO: usize = 3;
-static BAR: Foo = Foo { marker: marker::NoSync };
+static BAR: Foo = Foo;
 //~^ ERROR: the trait `core::marker::Sync` is not implemented
 
 fn main() {}
diff --git a/src/test/compile-fail/issue-7013.rs b/src/test/compile-fail/issue-7013.rs
index d246e4e54d01..90ecfb6015dc 100644
--- a/src/test/compile-fail/issue-7013.rs
+++ b/src/test/compile-fail/issue-7013.rs
@@ -35,5 +35,4 @@ struct A {
 fn main() {
     let a = A {v: box B{v: None} as Box<Foo+Send>};
     //~^ ERROR the trait `core::marker::Send` is not implemented
-    //~^^ ERROR the trait `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/kindck-nonsendable-1.rs b/src/test/compile-fail/kindck-nonsendable-1.rs
index 79aec386d9a7..5bc769f8e117 100644
--- a/src/test/compile-fail/kindck-nonsendable-1.rs
+++ b/src/test/compile-fail/kindck-nonsendable-1.rs
@@ -19,6 +19,5 @@ fn main() {
     let x = Rc::new(3us);
     bar(move|| foo(x));
     //~^ ERROR `core::marker::Send` is not implemented
-    //~^^ ERROR `core::marker::Send` is not implemented
 }
 
diff --git a/src/test/compile-fail/marker-no-send.rs b/src/test/compile-fail/marker-no-send.rs
index 032718d7e9a1..cd253b2f9e5d 100644
--- a/src/test/compile-fail/marker-no-send.rs
+++ b/src/test/compile-fail/marker-no-send.rs
@@ -8,6 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-stage1
+// ignore-stage2
+// ignore-stage3
+
 use std::marker;
 
 fn foo<P:Send>(p: P) { }
diff --git a/src/test/compile-fail/marker-no-share.rs b/src/test/compile-fail/marker-no-share.rs
index b29f7fab2ccf..d86b6a0a674e 100644
--- a/src/test/compile-fail/marker-no-share.rs
+++ b/src/test/compile-fail/marker-no-share.rs
@@ -8,6 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-stage1
+// ignore-stage2
+// ignore-stage3
+
 use std::marker;
 
 fn foo<P: Sync>(p: P) { }
diff --git a/src/test/compile-fail/mutable-enum-indirect.rs b/src/test/compile-fail/mutable-enum-indirect.rs
index f90bb610d374..1657d602e24c 100644
--- a/src/test/compile-fail/mutable-enum-indirect.rs
+++ b/src/test/compile-fail/mutable-enum-indirect.rs
@@ -11,13 +11,18 @@
 // Tests that an `&` pointer to something inherently mutable is itself
 // to be considered mutable.
 
-use std::marker;
+#![feature(optin_builtin_traits)]
 
-enum Foo { A(marker::NoSync) }
+use std::marker::Sync;
+
+struct NoSync;
+impl !Sync for NoSync {}
+
+enum Foo { A(NoSync) }
 
 fn bar<T: Sync>(_: T) {}
 
 fn main() {
-    let x = Foo::A(marker::NoSync);
+    let x = Foo::A(NoSync);
     bar(&x); //~ ERROR the trait `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/no-send-res-ports.rs b/src/test/compile-fail/no-send-res-ports.rs
index 551953af1352..52335ab76bda 100644
--- a/src/test/compile-fail/no-send-res-ports.rs
+++ b/src/test/compile-fail/no-send-res-ports.rs
@@ -37,7 +37,6 @@ fn main() {
 
     Thread::spawn(move|| {
         //~^ ERROR `core::marker::Send` is not implemented
-        //~^^ ERROR `core::marker::Send` is not implemented
         let y = x;
         println!("{:?}", y);
     });
diff --git a/src/test/compile-fail/no_send-enum.rs b/src/test/compile-fail/no_send-enum.rs
index cf1f13e8bb86..625d51260c4d 100644
--- a/src/test/compile-fail/no_send-enum.rs
+++ b/src/test/compile-fail/no_send-enum.rs
@@ -8,16 +8,21 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::marker;
+#![feature(optin_builtin_traits)]
+
+use std::marker::Send;
+
+struct NoSend;
+impl !Send for NoSend {}
 
 enum Foo {
-    A(marker::NoSend)
+    A(NoSend)
 }
 
 fn bar<T: Send>(_: T) {}
 
 fn main() {
-    let x = Foo::A(marker::NoSend);
+    let x = Foo::A(NoSend);
     bar(x);
     //~^ ERROR `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/no_send-rc.rs b/src/test/compile-fail/no_send-rc.rs
index 82cc319466a6..d404988bd984 100644
--- a/src/test/compile-fail/no_send-rc.rs
+++ b/src/test/compile-fail/no_send-rc.rs
@@ -16,5 +16,4 @@ fn main() {
     let x = Rc::new(5is);
     bar(x);
     //~^ ERROR `core::marker::Send` is not implemented
-    //~^^ ERROR `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/no_send-struct.rs b/src/test/compile-fail/no_send-struct.rs
index bef705237872..7f16db0ba947 100644
--- a/src/test/compile-fail/no_send-struct.rs
+++ b/src/test/compile-fail/no_send-struct.rs
@@ -8,17 +8,20 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::marker;
+#![feature(optin_builtin_traits)]
+
+use std::marker::Send;
 
 struct Foo {
     a: isize,
-    ns: marker::NoSend
 }
 
+impl !Send for Foo {}
+
 fn bar<T: Send>(_: T) {}
 
 fn main() {
-    let x = Foo { a: 5, ns: marker::NoSend };
+    let x = Foo { a: 5 };
     bar(x);
     //~^ ERROR the trait `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/no_share-enum.rs b/src/test/compile-fail/no_share-enum.rs
index 33222eef44e7..9331afdbbb5d 100644
--- a/src/test/compile-fail/no_share-enum.rs
+++ b/src/test/compile-fail/no_share-enum.rs
@@ -8,14 +8,19 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::marker;
+#![feature(optin_builtin_traits)]
 
-enum Foo { A(marker::NoSync) }
+use std::marker::Sync;
+
+struct NoSync;
+impl !Sync for NoSync {}
+
+enum Foo { A(NoSync) }
 
 fn bar<T: Sync>(_: T) {}
 
 fn main() {
-    let x = Foo::A(marker::NoSync);
+    let x = Foo::A(NoSync);
     bar(x);
     //~^ ERROR the trait `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/no_share-rc.rs b/src/test/compile-fail/no_share-rc.rs
index 0d3e380d4a12..4917db602e17 100644
--- a/src/test/compile-fail/no_share-rc.rs
+++ b/src/test/compile-fail/no_share-rc.rs
@@ -17,5 +17,4 @@ fn main() {
     let x = Rc::new(RefCell::new(5is));
     bar(x);
     //~^ ERROR the trait `core::marker::Sync` is not implemented
-    //~^^ ERROR the trait `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/no_share-struct.rs b/src/test/compile-fail/no_share-struct.rs
index c7028ce97869..b5ccceb3b2a7 100644
--- a/src/test/compile-fail/no_share-struct.rs
+++ b/src/test/compile-fail/no_share-struct.rs
@@ -8,14 +8,17 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::marker;
+#![feature(optin_builtin_traits)]
 
-struct Foo { a: isize, m: marker::NoSync }
+use std::marker::Sync;
+
+struct Foo { a: isize }
+impl !Sync for Foo {}
 
 fn bar<T: Sync>(_: T) {}
 
 fn main() {
-    let x = Foo { a: 5, m: marker::NoSync };
+    let x = Foo { a: 5 };
     bar(x);
     //~^ ERROR the trait `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/task-rng-isnt-sendable.rs b/src/test/compile-fail/task-rng-isnt-sendable.rs
index fe31d81983e1..dc3385f4bb92 100644
--- a/src/test/compile-fail/task-rng-isnt-sendable.rs
+++ b/src/test/compile-fail/task-rng-isnt-sendable.rs
@@ -17,5 +17,4 @@ fn test_send<S: Send>() {}
 pub fn main() {
     test_send::<rand::ThreadRng>();
     //~^ ERROR `core::marker::Send` is not implemented
-    //~^^ ERROR `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/typeck-unsafe-always-share.rs b/src/test/compile-fail/typeck-unsafe-always-share.rs
index a9113c6e99f4..38e3b5763483 100644
--- a/src/test/compile-fail/typeck-unsafe-always-share.rs
+++ b/src/test/compile-fail/typeck-unsafe-always-share.rs
@@ -10,29 +10,26 @@
 
 // Verify that UnsafeCell is *always* sync regardless if `T` is sync.
 
-// ignore-tidy-linelength
+#![feature(optin_builtin_traits)]
 
 use std::cell::UnsafeCell;
-use std::marker;
+use std::marker::Sync;
 
 struct MySync<T> {
     u: UnsafeCell<T>
 }
 
-struct NoSync {
-    m: marker::NoSync
-}
+struct NoSync;
+impl !Sync for NoSync {}
 
-fn test<T: Sync>(s: T){
-
-}
+fn test<T: Sync>(s: T) {}
 
 fn main() {
     let us = UnsafeCell::new(MySync{u: UnsafeCell::new(0is)});
     test(us);
     //~^ ERROR `core::marker::Sync` is not implemented
 
-    let uns = UnsafeCell::new(NoSync{m: marker::NoSync});
+    let uns = UnsafeCell::new(NoSync);
     test(uns);
     //~^ ERROR `core::marker::Sync` is not implemented
 
@@ -40,7 +37,6 @@ fn main() {
     test(ms);
     //~^ ERROR `core::marker::Sync` is not implemented
 
-    let ns = NoSync{m: marker::NoSync};
-    test(ns);
+    test(NoSync);
     //~^ ERROR `core::marker::Sync` is not implemented
 }
diff --git a/src/test/compile-fail/unique-unique-kind.rs b/src/test/compile-fail/unique-unique-kind.rs
index 4b7f11b05609..322de45daf03 100644
--- a/src/test/compile-fail/unique-unique-kind.rs
+++ b/src/test/compile-fail/unique-unique-kind.rs
@@ -19,5 +19,4 @@ fn main() {
     let i = box Rc::new(100is);
     f(i);
     //~^ ERROR `core::marker::Send` is not implemented
-    //~^^ ERROR `core::marker::Send` is not implemented
 }
diff --git a/src/test/compile-fail/unsendable-class.rs b/src/test/compile-fail/unsendable-class.rs
index abd93fdfc6c6..f51eee379347 100644
--- a/src/test/compile-fail/unsendable-class.rs
+++ b/src/test/compile-fail/unsendable-class.rs
@@ -31,6 +31,5 @@ fn main() {
   let cat = "kitty".to_string();
   let (tx, _) = channel();
   //~^ ERROR `core::marker::Send` is not implemented
-  //~^^ ERROR `core::marker::Send` is not implemented
   tx.send(foo(42, Rc::new(cat)));
 }
diff --git a/src/test/run-pass/coherence-negative-impls-safe.rs b/src/test/run-pass/coherence-negative-impls-safe.rs
index 646da74992f3..7844ef3faca4 100644
--- a/src/test/run-pass/coherence-negative-impls-safe.rs
+++ b/src/test/run-pass/coherence-negative-impls-safe.rs
@@ -14,8 +14,6 @@ use std::marker::Send;
 
 struct TestType;
 
-unsafe impl Send for TestType {}
-
 impl !Send for TestType {}
 
 fn main() {}
diff --git a/src/test/run-pass/syntax-trait-polarity.rs b/src/test/run-pass/syntax-trait-polarity.rs
index a91e5da15376..7c29675f3f4f 100644
--- a/src/test/run-pass/syntax-trait-polarity.rs
+++ b/src/test/run-pass/syntax-trait-polarity.rs
@@ -18,14 +18,14 @@ impl TestType {}
 
 trait TestTrait {}
 
-unsafe impl !Send for TestType {}
+impl !Send for TestType {}
 impl !TestTrait for TestType {}
 
 struct TestType2<T>;
 
 impl<T> TestType2<T> {}
 
-unsafe impl<T> !Send for TestType2<T> {}
+impl<T> !Send for TestType2<T> {}
 impl<T> !TestTrait for TestType2<T> {}
 
 fn main() {}