diff --git a/polkadot/node/service/src/chain_spec.rs b/polkadot/node/service/src/chain_spec.rs
index 072fffc6d0987f38de00b345c9f61341538e14ed..37098dddbee3bd8e01b4b2fdf1cbed0c4f78c577 100644
--- a/polkadot/node/service/src/chain_spec.rs
+++ b/polkadot/node/service/src/chain_spec.rs
@@ -889,8 +889,8 @@ fn rococo_staging_testnet_config_genesis(wasm_binary: &[u8]) -> rococo_runtime::
 		},
 		parachains_configuration: rococo_runtime::ParachainsConfigurationConfig {
 			config: polkadot_runtime_parachains::configuration::HostConfiguration {
-				validation_upgrade_frequency: 600u32,
-				validation_upgrade_delay: 300,
+				validation_upgrade_frequency: 1u32,
+				validation_upgrade_delay: 1,
 				code_retention_period: 1200,
 				max_code_size: 5 * 1024 * 1024,
 				max_pov_size: MAX_POV_SIZE,
@@ -899,7 +899,7 @@ fn rococo_staging_testnet_config_genesis(wasm_binary: &[u8]) -> rococo_runtime::
 				chain_availability_period: 4,
 				thread_availability_period: 4,
 				max_upward_queue_count: 8,
-				max_upward_queue_size: 8 * 1024,
+				max_upward_queue_size: 1024 * 1024,
 				max_downward_message_size: 1024,
 				// this is approximatelly 4ms.
 				//
@@ -907,7 +907,7 @@ fn rococo_staging_testnet_config_genesis(wasm_binary: &[u8]) -> rococo_runtime::
 				// an import since that's a made up number and should be replaced with a constant
 				// obtained by benchmarking anyway.
 				preferred_dispatchable_upward_messages_step_weight: 4 * 1_000_000_000,
-				max_upward_message_size: 1024,
+				max_upward_message_size: 1024 * 1024,
 				max_upward_message_num_per_candidate: 5,
 				hrmp_open_request_ttl: 5,
 				hrmp_sender_deposit: 0,
@@ -916,7 +916,7 @@ fn rococo_staging_testnet_config_genesis(wasm_binary: &[u8]) -> rococo_runtime::
 				hrmp_channel_max_total_size: 8 * 1024,
 				hrmp_max_parachain_inbound_channels: 4,
 				hrmp_max_parathread_inbound_channels: 4,
-				hrmp_channel_max_message_size: 1024,
+				hrmp_channel_max_message_size: 1024 * 1024,
 				hrmp_max_parachain_outbound_channels: 4,
 				hrmp_max_parathread_outbound_channels: 4,
 				hrmp_max_message_num_per_candidate: 5,
@@ -924,7 +924,7 @@ fn rococo_staging_testnet_config_genesis(wasm_binary: &[u8]) -> rococo_runtime::
 				no_show_slots: 2,
 				n_delay_tranches: 25,
 				needed_approvals: 2,
-				relay_vrf_modulo_samples: 10,
+				relay_vrf_modulo_samples: 2,
 				zeroth_delay_tranche_width: 0,
 				..Default::default()
 			},