diff --git a/testing/examples/runtime_api_tests.rs b/testing/examples/runtime_api_tests.rs
index 2eb779364..b92b4e42d 100644
--- a/testing/examples/runtime_api_tests.rs
+++ b/testing/examples/runtime_api_tests.rs
@@ -46,5 +46,6 @@ async fn main() {
 
 	// BlockBuilder
 	let extrinsic = api.balance_transfer_allow_death(bob.clone().into(), 1000);
-	let authority_id = api.apply_extrinsic(extrinsic, None).unwrap().unwrap().unwrap();
+	api.apply_extrinsic(extrinsic, None).unwrap().unwrap().unwrap();
+	let _header = api.finalize_block(None).unwrap();
 }