diff --git a/tests/ui/intrinsics/bad-intrinsic-monomorphization.rs b/tests/ui/intrinsics/bad-intrinsic-monomorphization.rs
index fa9cbe4400c..254ac24f0b9 100644
--- a/tests/ui/intrinsics/bad-intrinsic-monomorphization.rs
+++ b/tests/ui/intrinsics/bad-intrinsic-monomorphization.rs
@@ -16,7 +16,7 @@ use std::intrinsics;
 #[derive(Copy, Clone)]
 pub struct Foo(i64);
 
-pub fn test_cttz(v: Foo) -> Foo {
+pub fn test_cttz(v: Foo) -> u32 {
     intrinsics::cttz(v)
     //~^ ERROR `cttz` intrinsic: expected basic integer type, found `Foo`
 }
diff --git a/tests/ui/intrinsics/intrinsics-integer.rs b/tests/ui/intrinsics/intrinsics-integer.rs
index bfd7e4714fe..7dbc4b8b7ce 100644
--- a/tests/ui/intrinsics/intrinsics-integer.rs
+++ b/tests/ui/intrinsics/intrinsics-integer.rs
@@ -6,13 +6,13 @@
 mod rusti {
     extern "rust-intrinsic" {
         #[rustc_safe_intrinsic]
-        pub fn ctpop<T>(x: T) -> T;
+        pub fn ctpop<T>(x: T) -> u32;
         #[rustc_safe_intrinsic]
-        pub fn ctlz<T>(x: T) -> T;
-        pub fn ctlz_nonzero<T>(x: T) -> T;
+        pub fn ctlz<T>(x: T) -> u32;
+        pub fn ctlz_nonzero<T>(x: T) -> u32;
         #[rustc_safe_intrinsic]
-        pub fn cttz<T>(x: T) -> T;
-        pub fn cttz_nonzero<T>(x: T) -> T;
+        pub fn cttz<T>(x: T) -> u32;
+        pub fn cttz_nonzero<T>(x: T) -> u32;
         #[rustc_safe_intrinsic]
         pub fn bswap<T>(x: T) -> T;
         #[rustc_safe_intrinsic]