diff --git a/tests/assembly/targets/targets-elf.rs b/tests/assembly/targets/targets-elf.rs
index 7d50647bed18e..59d27ed649c0f 100644
--- a/tests/assembly/targets/targets-elf.rs
+++ b/tests/assembly/targets/targets-elf.rs
@@ -676,6 +676,8 @@
 #[lang = "sized"]
 trait Sized {}
 
+// Force linkage to ensure code is actually generated
+#[no_mangle]
 pub fn test() -> u8 {
     42
 }
diff --git a/tests/assembly/targets/targets-macho.rs b/tests/assembly/targets/targets-macho.rs
index 8095ae9029b75..25e9059afeb18 100644
--- a/tests/assembly/targets/targets-macho.rs
+++ b/tests/assembly/targets/targets-macho.rs
@@ -83,6 +83,8 @@
 #[lang = "sized"]
 trait Sized {}
 
+// Force linkage to ensure code is actually generated
+#[no_mangle]
 pub fn test() -> u8 {
     42
 }