diff --git a/cumulus/test/parachain/src/command.rs b/cumulus/test/parachain/src/command.rs
index 04ac325af8..369846d382 100644
--- a/cumulus/test/parachain/src/command.rs
+++ b/cumulus/test/parachain/src/command.rs
@@ -204,7 +204,7 @@ pub fn run() -> Result<()> {
 				let task_executor = config.task_executor.clone();
 				let polkadot_config =
 					SubstrateCli::create_configuration(&polkadot_cli, &polkadot_cli, task_executor)
-						.unwrap();
+						.map_err(|err| format!("Relay chain argument error: {}", err))?;
 
 				info!("Parachain id: {:?}", id);
 				info!("Parachain Account: {}", parachain_account);