diff --git a/bin/node/cli/src/chain_spec.rs b/bin/node/cli/src/chain_spec.rs
index 8b86cb865b2da..cf47d25bc6506 100644
--- a/bin/node/cli/src/chain_spec.rs
+++ b/bin/node/cli/src/chain_spec.rs
@@ -349,8 +349,7 @@ pub fn local_testnet_config() -> ChainSpec {
 #[cfg(test)]
 pub(crate) mod tests {
 	use super::*;
-	use crate::service::new_full;
-	use sc_service::Roles;
+	use crate::service::{new_full, new_light};
 	use sc_service_test;
 
 	fn local_testnet_genesis_instant_single() -> GenesisConfig {
@@ -398,12 +397,7 @@ pub(crate) mod tests {
 		sc_service_test::connectivity(
 			integration_test_config_with_two_authorities(),
 			|config| new_full(config),
-			|mut config| {
-				// light nodes are unsupported
-				config.roles = Roles::FULL;
-				new_full(config)
-			},
-			true,
+			|config| new_light(config),
 		);
 	}
 }
diff --git a/bin/node/cli/src/service.rs b/bin/node/cli/src/service.rs
index 7716f5a1c34fc..1403393866fdd 100644
--- a/bin/node/cli/src/service.rs
+++ b/bin/node/cli/src/service.rs
@@ -408,8 +408,8 @@ mod tests {
 	use sp_timestamp;
 	use sp_finality_tracker;
 	use sp_keyring::AccountKeyring;
-	use sc_service::{AbstractService, Roles};
-	use crate::service::new_full;
+	use sc_service::AbstractService;
+	use crate::service::{new_full, new_light};
 	use sp_runtime::traits::IdentifyAccount;
 
 	type AccountPublic = <Signature as Verify>::Signer;
@@ -470,11 +470,7 @@ mod tests {
 		sc_service_test::sync(
 			sc_chain_spec::integration_test_config(),
 			|config| new_full(config),
-			|mut config| {
-				// light nodes are unsupported
-				config.roles = Roles::FULL;
-				new_full(config)
-			},
+			|mut config| new_light(config),
 			block_factory,
 			extrinsic_factory,
 		);
@@ -510,11 +506,7 @@ mod tests {
 					setup_handles = Some((block_import.clone(), babe_link.clone()));
 				}).map(move |(node, x)| (node, (x, setup_handles.unwrap())))
 			},
-			|mut config| {
-				// light nodes are unsupported
-				config.roles = Roles::FULL;
-				new_full(config)
-			},
+			|config| new_light(config),
 			|service, &mut (ref inherent_data_providers, (ref mut block_import, ref babe_link))| {
 				let mut inherent_data = inherent_data_providers
 					.create_inherent_data()
@@ -638,11 +630,7 @@ mod tests {
 		sc_service_test::consensus(
 			crate::chain_spec::tests::integration_test_config_with_two_authorities(),
 			|config| new_full(config),
-			|mut config| {
-				// light nodes are unsupported
-				config.roles = Roles::FULL;
-				new_full(config)
-			},
+			|config| new_light(config),
 			vec![
 				"//Alice".into(),
 				"//Bob".into(),
diff --git a/client/service/test/src/lib.rs b/client/service/test/src/lib.rs
index e1eb919a6f652..dae0f5604fcc8 100644
--- a/client/service/test/src/lib.rs
+++ b/client/service/test/src/lib.rs
@@ -299,8 +299,6 @@ pub fn connectivity<G, E, Fb, F, Lb, L>(
 	spec: ChainSpec<G, E>,
 	full_builder: Fb,
 	light_builder: Lb,
-	light_node_interconnectivity: bool, // should normally be false, unless the light nodes
-	// aren't actually light.
 ) where
 	E: Clone,
 	Fb: Fn(Configuration<(), G, E>) -> Result<F, Error>,
@@ -312,11 +310,7 @@ pub fn connectivity<G, E, Fb, F, Lb, L>(
 	const NUM_LIGHT_NODES: usize = 5;
 
 	let expected_full_connections = NUM_FULL_NODES - 1 + NUM_LIGHT_NODES;
-	let expected_light_connections = if light_node_interconnectivity {
-		expected_full_connections
-	} else {
-		NUM_FULL_NODES
-	};
+	let expected_light_connections = NUM_FULL_NODES;
 
 	{
 		let temp = tempdir_with_prefix("substrate-connectivity-test");