Allow &self without a type when the block only has one type
diff --git a/tests/ffi/tests.h b/tests/ffi/tests.h
index 43ac229..ed6d541 100644
--- a/tests/ffi/tests.h
+++ b/tests/ffi/tests.h
@@ -13,6 +13,8 @@
   C(size_t n);
   size_t get() const;
   size_t set(size_t n);
+  size_t get2() const;
+  size_t set2(size_t n);
 
 private:
   size_t n;