diff --git a/tests/pinned_drop.rs b/tests/pinned_drop.rs
index 80451fe7..9765db98 100644
--- a/tests/pinned_drop.rs
+++ b/tests/pinned_drop.rs
@@ -137,6 +137,8 @@ fn self_inside_macro_containing_fn() {
     impl PinnedDrop for S {
         fn drop(self: Pin<&mut Self>) {
             mac!({
+                #[allow(dead_code)]
+                struct S(());
                 impl S {
                     fn _f(self) -> Self {
                         self