diff --git a/tests/compile-fail/deallocate-bad-alignment.rs b/tests/compile-fail/deallocate-bad-alignment.rs
index f2cd87bac622..9b5ee9a934b0 100644
--- a/tests/compile-fail/deallocate-bad-alignment.rs
+++ b/tests/compile-fail/deallocate-bad-alignment.rs
@@ -1,15 +1,10 @@
-#![feature(allocator_api)]
-
-extern crate alloc;
-
-use alloc::alloc::Global;
-use std::alloc::{AllocRef, Layout};
+use std::alloc::{alloc, dealloc, realloc, Layout};
 
 // error-pattern: allocation has size 1 and alignment 1, but gave size 1 and alignment 2
 
 fn main() {
     unsafe {
-        let x = Global.alloc(Layout::from_size_align_unchecked(1, 1)).unwrap().0;
-        Global.dealloc(x, Layout::from_size_align_unchecked(1, 2));
+        let x = alloc(Layout::from_size_align_unchecked(1, 1));
+        dealloc(x, Layout::from_size_align_unchecked(1, 2));
     }
 }
diff --git a/tests/compile-fail/deallocate-bad-size.rs b/tests/compile-fail/deallocate-bad-size.rs
index 498a662518e5..39a0d48c8b1a 100644
--- a/tests/compile-fail/deallocate-bad-size.rs
+++ b/tests/compile-fail/deallocate-bad-size.rs
@@ -1,15 +1,10 @@
-#![feature(allocator_api)]
-
-extern crate alloc;
-
-use alloc::alloc::Global;
-use std::alloc::{AllocRef, Layout};
+use std::alloc::{alloc, dealloc, realloc, Layout};
 
 // error-pattern: allocation has size 1 and alignment 1, but gave size 2 and alignment 1
 
 fn main() {
     unsafe {
-        let x = Global.alloc(Layout::from_size_align_unchecked(1, 1)).unwrap().0;
-        Global.dealloc(x, Layout::from_size_align_unchecked(2, 1));
+        let x = alloc(Layout::from_size_align_unchecked(1, 1));
+        dealloc(x, Layout::from_size_align_unchecked(2, 1));
     }
 }
diff --git a/tests/compile-fail/deallocate-twice.rs b/tests/compile-fail/deallocate-twice.rs
index a851d75b9d5c..3c5e8e96360c 100644
--- a/tests/compile-fail/deallocate-twice.rs
+++ b/tests/compile-fail/deallocate-twice.rs
@@ -1,16 +1,11 @@
-#![feature(allocator_api)]
-
-extern crate alloc;
-
-use alloc::alloc::Global;
-use std::alloc::{AllocRef, Layout};
+use std::alloc::{alloc, dealloc, realloc, Layout};
 
 // error-pattern: dereferenced after this allocation got freed
 
 fn main() {
     unsafe {
-        let x = Global.alloc(Layout::from_size_align_unchecked(1, 1)).unwrap().0;
-        Global.dealloc(x, Layout::from_size_align_unchecked(1, 1));
-        Global.dealloc(x, Layout::from_size_align_unchecked(1, 1));
+        let x = alloc(Layout::from_size_align_unchecked(1, 1));
+        dealloc(x, Layout::from_size_align_unchecked(1, 1));
+        dealloc(x, Layout::from_size_align_unchecked(1, 1));
     }
 }
diff --git a/tests/compile-fail/reallocate-bad-size.rs b/tests/compile-fail/reallocate-bad-size.rs
index a62c1adae7e6..bbdef4421b6c 100644
--- a/tests/compile-fail/reallocate-bad-size.rs
+++ b/tests/compile-fail/reallocate-bad-size.rs
@@ -1,15 +1,10 @@
-#![feature(allocator_api)]
-
-extern crate alloc;
-
-use alloc::alloc::Global;
-use std::alloc::{AllocRef, Layout};
+use std::alloc::{alloc, dealloc, realloc, Layout};
 
 // error-pattern: allocation has size 1 and alignment 1, but gave size 2 and alignment 1
 
 fn main() {
     unsafe {
-        let x = Global.alloc(Layout::from_size_align_unchecked(1, 1)).unwrap().0;
-        Global.realloc(x, Layout::from_size_align_unchecked(2, 1), 1).unwrap();
+        let x = alloc(Layout::from_size_align_unchecked(1, 1));
+        realloc(x, Layout::from_size_align_unchecked(2, 1), 1);
     }
 }
diff --git a/tests/compile-fail/reallocate-change-alloc.rs b/tests/compile-fail/reallocate-change-alloc.rs
index 0d4b60e0a336..8130d72dee59 100644
--- a/tests/compile-fail/reallocate-change-alloc.rs
+++ b/tests/compile-fail/reallocate-change-alloc.rs
@@ -1,14 +1,9 @@
-#![feature(allocator_api)]
-
-extern crate alloc;
-
-use alloc::alloc::Global;
-use std::alloc::{AllocRef, Layout};
+use std::alloc::{alloc, dealloc, realloc, Layout};
 
 fn main() {
     unsafe {
-        let x = Global.alloc(Layout::from_size_align_unchecked(1, 1)).unwrap().0;
-        Global.realloc(x, Layout::from_size_align_unchecked(1, 1), 1).unwrap();
-        let _z = *(x.as_ptr() as *mut u8); //~ ERROR dereferenced after this allocation got freed
+        let x = alloc(Layout::from_size_align_unchecked(1, 1));
+        realloc(x, Layout::from_size_align_unchecked(1, 1), 1);
+        let _z = *x; //~ ERROR dereferenced after this allocation got freed
     }
 }
diff --git a/tests/compile-fail/reallocate-dangling.rs b/tests/compile-fail/reallocate-dangling.rs
index 9661d7e96674..702ddc0724a3 100644
--- a/tests/compile-fail/reallocate-dangling.rs
+++ b/tests/compile-fail/reallocate-dangling.rs
@@ -1,16 +1,11 @@
-#![feature(allocator_api)]
-
-extern crate alloc;
-
-use alloc::alloc::Global;
-use std::alloc::{AllocRef, Layout};
+use std::alloc::{alloc, dealloc, realloc, Layout};
 
 // error-pattern: dereferenced after this allocation got freed
 
 fn main() {
     unsafe {
-        let x = Global.alloc(Layout::from_size_align_unchecked(1, 1)).unwrap().0;
-        Global.dealloc(x, Layout::from_size_align_unchecked(1, 1));
-        Global.realloc(x, Layout::from_size_align_unchecked(1, 1), 1).unwrap();
+        let x = alloc(Layout::from_size_align_unchecked(1, 1));
+        dealloc(x, Layout::from_size_align_unchecked(1, 1));
+        realloc(x, Layout::from_size_align_unchecked(1, 1), 1);
     }
 }