diff --git a/testing/examples/chain_tests.rs b/testing/examples/chain_tests.rs
index 3cf6cd591..973a725ba 100644
--- a/testing/examples/chain_tests.rs
+++ b/testing/examples/chain_tests.rs
@@ -15,8 +15,9 @@
 
 //! Tests for the chain rpc interface functions.
 
+use sp_keyring::AccountKeyring;
 use substrate_api_client::{
-	ac_primitives::AssetRuntimeConfig,
+	ac_primitives::{DefaultRuntimeConfig, ExtrinsicSigner},
 	rpc::{HandleSubscription, JsonrpseeClient},
 	Api, GetChainInfo, SubscribeChain,
 };
@@ -25,7 +26,9 @@ use substrate_api_client::{
 async fn main() {
 	// Setup
 	let client = JsonrpseeClient::with_default_url().unwrap();
-	let api = Api::<AssetRuntimeConfig, _>::new(client).unwrap();
+	let mut api = Api::<DefaultRuntimeConfig, _>::new(client).unwrap();
+	let signer = AccountKeyring::Alice.pair();
+	api.set_signer(ExtrinsicSigner::<DefaultRuntimeConfig>::new(signer));
 
 	// GetChainInfo
 	let finalized_header_hash = api.get_finalized_head().unwrap().unwrap();