diff --git a/core/bin/external_node/src/config/mod.rs b/core/bin/external_node/src/config/mod.rs
index ed0ea50cdc04..46b97550483b 100644
--- a/core/bin/external_node/src/config/mod.rs
+++ b/core/bin/external_node/src/config/mod.rs
@@ -4,6 +4,7 @@ use anyhow::Context;
 use serde::Deserialize;
 use url::Url;
 use zksync_basic_types::{Address, L1ChainId, L2ChainId};
+use zksync_config::{configs::chain::L1BatchCommitDataGeneratorMode, ObjectStoreConfig};
 use zksync_consensus_roles::node;
 use zksync_core::{
     api_server::{
@@ -19,8 +20,6 @@ use zksync_web3_decl::{
     namespaces::{EthNamespaceClient, ZksNamespaceClient},
 };
 
-use zksync_config::{configs::chain::L1BatchCommitDataGeneratorMode, ObjectStoreConfig};
-
 #[cfg(test)]
 mod tests;
 
diff --git a/core/bin/external_node/src/config/tests.rs b/core/bin/external_node/src/config/tests.rs
index 243be39a1139..8eb9792b8eee 100644
--- a/core/bin/external_node/src/config/tests.rs
+++ b/core/bin/external_node/src/config/tests.rs
@@ -25,6 +25,10 @@ fn parsing_optional_config_from_empty_env() {
         128 * BYTES_IN_MEGABYTE
     );
     assert_eq!(config.max_response_body_size(), 10 * BYTES_IN_MEGABYTE);
+    assert_eq!(
+        config.l1_batch_commit_data_generator_mode,
+        L1BatchCommitDataGeneratorMode::Rollup
+    );
 }
 
 #[test]
@@ -44,6 +48,7 @@ fn parsing_optional_config_from_env() {
         ("EN_MERKLE_TREE_MULTI_GET_CHUNK_SIZE", "1000"),
         ("EN_MERKLE_TREE_BLOCK_CACHE_SIZE_MB", "32"),
         ("EN_MAX_RESPONSE_BODY_SIZE_MB", "1"),
+        ("EN_L1_BATCH_COMMIT_DATA_GENERATOR_MODE", "Validium"),
     ];
     let env_vars = env_vars
         .into_iter()
@@ -70,4 +75,8 @@ fn parsing_optional_config_from_env() {
         32 * BYTES_IN_MEGABYTE
     );
     assert_eq!(config.max_response_body_size(), BYTES_IN_MEGABYTE);
+    assert_eq!(
+        config.l1_batch_commit_data_generator_mode,
+        L1BatchCommitDataGeneratorMode::Validium
+    );
 }