diff --git a/src/backtest_engine/schemas/strategy-bot/v1/official-backtest-request.schema.json b/src/backtest_engine/schemas/strategy-bot/v1/official-backtest-request.schema.json
index a5b3e33..9b37edc 100644
--- a/src/backtest_engine/schemas/strategy-bot/v1/official-backtest-request.schema.json
+++ b/src/backtest_engine/schemas/strategy-bot/v1/official-backtest-request.schema.json
@@ -59,7 +59,6 @@
     "requestReason": {"const": "STRATEGY_RELEASE"},
     "featureMaterializations": {
       "type": "array",
-      "minItems": 1,
       "items": {
         "type": "object",
         "required": ["featureMaterializationId", "lockedResultHash"],
diff --git a/tests/test_contracts.py b/tests/test_contracts.py
index 0eb78a6..1d3ceb6 100644
--- a/tests/test_contracts.py
+++ b/tests/test_contracts.py
@@ -271,6 +271,16 @@ def test_consumer_accepts_bs_official_backtest_request_verbatim(
     assert accepted["datasetManifestId"] == B_DATASET_MANIFEST_ID
 
 
+def test_official_request_accepts_no_feature_materializations(
+    official_request: dict[str, Any],
+) -> None:
+    official_request["featureMaterializations"] = []
+
+    accepted = validate_official_backtest_request(official_request)
+
+    assert accepted["featureMaterializations"] == []
+
+
 def test_official_request_identity_covers_every_server_selected_dataset(
     official_request: dict[str, Any],
 ) -> None: