diff --git a/client/service/test/src/lib.rs b/client/service/test/src/lib.rs
index 63c7e0795dc1a..74f5e12873ba2 100644
--- a/client/service/test/src/lib.rs
+++ b/client/service/test/src/lib.rs
@@ -210,6 +210,7 @@ fn node_config<G: RuntimeGenesis + 'static, E: ChainSpecExtension + Clone + 'sta
 		tracing_receiver: Default::default(),
 		max_runtime_instances: 8,
 		announce_block: true,
+		informant_prefix: Default::default(),
 	}
 }
 
diff --git a/utils/browser/src/lib.rs b/utils/browser/src/lib.rs
index 408ba24cfed22..2293501d06ee0 100644
--- a/utils/browser/src/lib.rs
+++ b/utils/browser/src/lib.rs
@@ -97,6 +97,7 @@ where
 		wasm_method: Default::default(),
 		max_runtime_instances: 8,
 		announce_block: true,
+		informant_prefix: Default::default(),
 	};
 
 	Ok(config)
@@ -118,7 +119,10 @@ struct RpcMessage {
 pub fn start_client(mut service: impl AbstractService) -> Client {
 	// Spawn informant
 	wasm_bindgen_futures::spawn_local(
-		sc_informant::build(&service, sc_informant::OutputFormat::Plain).map(drop)
+		sc_informant::build(
+			&service,
+			sc_informant::OutputFormat::Plain { prefix: Default::default() },
+		).map(drop)
 	);
 
 	// We dispatch a background task responsible for processing the service.