diff --git a/deployments/sequencer/configs/overlays/hybrid/sepolia-integration/sequencer_config.jsonnet b/deployments/sequencer/configs/overlays/hybrid/sepolia-integration/sequencer_config.jsonnet
new file mode 100644
index 00000000000..a6cafadfe37
--- /dev/null
+++ b/deployments/sequencer/configs/overlays/hybrid/sepolia-integration/sequencer_config.jsonnet
@@ -0,0 +1,79 @@
+// Overrides layer for the `sepolia-integration` environment (hybrid layout).
+{
+  chain_id: 'SN_INTEGRATION_SEPOLIA',
+  native_classes_whitelist: 'All',
+  recorder_url: 'http://starknet-sepolia-integration.cende-recorder-proxy.starknet.io/',
+  starknet_url: 'https://feeder.integration-sepolia.starknet.io/',
+
+  base_layer_config: {
+    bpo1_start_block_number: 9456501,
+    bpo2_start_block_number: 9504747,
+    fusaka_no_bpo_start_block_number: 9408577,
+    starknet_contract_address: '0x4737c0c1B4D5b1A687B42610DdabEE781152359c',
+  },
+
+  batcher_config: {
+    dynamic_config: {
+      n_concurrent_txs: 2,
+    },
+    static_config: {
+      block_builder_config: {
+        bouncer_config: {
+          block_max_capacity: {
+            state_diff_size: 4000,
+          },
+        },
+        execute_config: {
+          n_workers: 1,
+        },
+      },
+      first_block_with_partial_block_hash: {
+        block_hash: '0x1ea2a9cfa3df5297d58c0a04d09d276bc68d40fe64701305bbe2ed8f417e869',
+        block_number: 35748,
+        parent_block_hash: '0x77140bef51bbb4d1932f17cc5081825ff18465a1df4440ca0429a4fa80f1dc5',
+      },
+    },
+  },
+
+  committer_config: {
+    storage_config: {
+      cache_size: 10000000,
+    },
+  },
+
+  consensus_manager_config: {
+    context_config: {
+      dynamic_config: {
+        min_l2_gas_price_per_height: '',
+      },
+    },
+    staking_manager_config: {
+      dynamic_config: {
+        default_committee: '0,10:0x64,1,0x1,true;0x65,1,0x1,true;0x66,1,0x1,true',
+      },
+    },
+  },
+
+  gateway_config: {
+    static_config: {
+      proof_archive_writer_config: {
+        bucket_name: 'starkware-starknet-integration',
+      },
+    },
+  },
+
+  sierra_compiler_config: {
+    audited_libfuncs_only: false,
+  },
+
+  state_sync_config: {
+    static_config: {
+      central_sync_client_config: {
+        sync_config: {
+          store_sierras_and_casms_block_threshold: 0,
+        },
+      },
+      network_config: null,
+    },
+  },
+}
diff --git a/deployments/sequencer/test/test_native_config.py b/deployments/sequencer/test/test_native_config.py
index 7b2286422e6..1a9acf8dafc 100644
--- a/deployments/sequencer/test/test_native_config.py
+++ b/deployments/sequencer/test/test_native_config.py
@@ -2,8 +2,8 @@
 
 Covers:
   - the null-preserving deep-merge,
-  - the per-layer lockstep test: the common base `sequencer_config.jsonnet` mirrors the combined
-    `config.sequencerConfig` of the common-layer YAMLs (folded).
+  - the per-layer lockstep test: each layer's `sequencer_config.jsonnet` mirrors the combined
+    `config.sequencerConfig` of that layer's YAMLs (folded).
 """
 
 import json
@@ -17,11 +17,12 @@
 
 LAYOUT = "hybrid"
 
-# Per-layer override-file dirs: the base/common layer holds a `sequencer_config.jsonnet` that must
-# mirror the combined `config.sequencerConfig` of the YAMLs in the same dir (see
+# Per-layer override-file dirs: each layer holds a `sequencer_config.jsonnet` that must mirror the
+# combined `config.sequencerConfig` of the YAMLs in the same dir (see
 # `_assert_layer_jsonnet_mirrors_combined_yaml`).
 HYBRID_OVERLAYS_DIR = DEPLOYMENTS_SEQUENCER / "configs" / "overlays" / LAYOUT
 COMMON_LAYER_DIR = HYBRID_OVERLAYS_DIR / "common"
+INTEGRATION_LAYER_DIR = HYBRID_OVERLAYS_DIR / "sepolia-integration"
 
 
 def test_deep_merge_preserves_explicit_null():
@@ -166,3 +167,8 @@ def test_common_layer_jsonnet_mirrors_combined_yaml():
     a stale/extra key in the jsonnet, or a value mismatch.
     """
     _assert_layer_jsonnet_mirrors_combined_yaml(COMMON_LAYER_DIR)
+
+
+def test_integration_layer_jsonnet_mirrors_combined_yaml():
+    """REGRESSION: same invariant for the `sepolia-integration` env layer."""
+    _assert_layer_jsonnet_mirrors_combined_yaml(INTEGRATION_LAYER_DIR)