diff --git a/src/confluent_kafka/schema_registry/schema_registry_client.py b/src/confluent_kafka/schema_registry/schema_registry_client.py
index f04790a98..24da93e00 100644
--- a/src/confluent_kafka/schema_registry/schema_registry_client.py
+++ b/src/confluent_kafka/schema_registry/schema_registry_client.py
@@ -351,8 +351,6 @@ class _SchemaCache(object):
 
     def __init__(self):
         self.lock = Lock()
-        self.schemaid_index = {}
-        self.schema_index = {}
         self.schema_id_index = defaultdict(dict)
         self.schema_index = defaultdict(dict)
         self.rs_id_index = defaultdict(dict)
diff --git a/tests/schema_registry/test_json_serdes.py b/tests/schema_registry/test_json_serdes.py
index d05580198..5f6226af3 100644
--- a/tests/schema_registry/test_json_serdes.py
+++ b/tests/schema_registry/test_json_serdes.py
@@ -219,7 +219,7 @@ def test_json_serialize_references():
         'bytesField': base64.b64encode(b'foobar').decode('utf-8'),
     }
     obj = {
-        'refField': referenced
+        'otherField': referenced
     }
     ref_schema = {
         "type": "object",