diff --git a/gcc/testsuite/rust/compile/non_foreign_variadic_function.rs b/gcc/testsuite/rust/compile/non_foreign_variadic_function.rs
new file mode 100644
index 000000000000..2a4d3090a66b
--- /dev/null
+++ b/gcc/testsuite/rust/compile/non_foreign_variadic_function.rs
@@ -0,0 +1,4 @@
+pub fn toto(a: i32, ...) {}
+// { dg-error "only foreign or .unsafe extern .C.. functions may be C-variadic" "" { target *-*-* } .-1 }
+
+fn main() {}