diff --git a/planetmint/backend/tarantool/query.py b/planetmint/backend/tarantool/query.py
index 5e1f964..e2219a6 100644
--- a/planetmint/backend/tarantool/query.py
+++ b/planetmint/backend/tarantool/query.py
@@ -100,7 +100,10 @@ def get_transactions(connection, transactions_ids: list):
 def store_metadatas(connection, metadata: list):
     space = connection.space("meta_data")
     for meta in metadata:
-        space.insert((meta["id"], meta["data"] if not "metadata" in meta else meta["metadata"]))
+        print(f"METADATA : {meta}")
+        data = meta["data"] if not "metadata" in meta else meta["metadata"]
+        if data:
+            space.insert((meta["id"], meta["data"] if not "metadata" in meta else meta["metadata"]))
 
 
 @register_query(TarantoolDB)
@@ -109,6 +112,7 @@ def get_metadata(connection, transaction_ids: list):
     space = connection.space("meta_data")
     for _id in transaction_ids:
         metadata = space.select(_id, index="id_search")
+        print(f"METADATA : {metadata}")
         _returned_data.append({"id": metadata.data[0][0], "metadata": metadata.data[0][1]})
     return _returned_data
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 48cfcaf..5edccc3 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -32,6 +32,7 @@ from planetmint.common.exceptions import DatabaseDoesNotExist
 from planetmint.lib import Block
 from tests.utils import gen_vote
 from planetmint.config import Config
+from planetmint.upsert_validator import ValidatorElection
 
 TEST_DB_NAME = 'planetmint_test'