diff --git a/src/test/ui/asm/aarch64/may_unwind.rs b/src/test/ui/asm/aarch64/may_unwind.rs
index 8e1ece53a47b..05892ec8a209 100644
--- a/src/test/ui/asm/aarch64/may_unwind.rs
+++ b/src/test/ui/asm/aarch64/may_unwind.rs
@@ -24,7 +24,7 @@ fn main() {
     let flag = &mut true;
     catch_unwind(AssertUnwindSafe(|| {
         let _foo = Foo(flag);
-        unsafe { asm!("bl _panicky", options(may_unwind)) };
+        unsafe { asm!("bl _panicky", clobber_abi("C"), options(may_unwind)) };
     }))
     .expect_err("expected a panic");
     assert_eq!(*flag, false);
diff --git a/src/test/ui/asm/x86_64/may_unwind.rs b/src/test/ui/asm/x86_64/may_unwind.rs
index cec597ea24ea..0d7c055fff83 100644
--- a/src/test/ui/asm/x86_64/may_unwind.rs
+++ b/src/test/ui/asm/x86_64/may_unwind.rs
@@ -24,7 +24,7 @@ fn main() {
     let flag = &mut true;
     catch_unwind(AssertUnwindSafe(|| {
         let _foo = Foo(flag);
-        unsafe { asm!("call panicky", options(may_unwind)) };
+        unsafe { asm!("call panicky", clobber_abi("C"), options(may_unwind)) };
     }))
     .expect_err("expected a panic");
     assert_eq!(*flag, false);