add required env vars to mocked celery startup

test/conftest.py

@@ -197,6 +197,11 @@ def mocked_worker_module(
         mocker, mocked_redis, data_config,
         cached_test_data, mocked_netifaces):
 
+    os.environ['BROKER_HOSTNAME'] = 'a.b.c'
+    os.environ['BROKER_PORT'] = '123'
+    os.environ['BROKER_DB_INDEX'] = '456'
+    os.environ['BROKER_SCHEME'] = 'redis'
+
     worker.InventoryTask.config = data_config
 
     def _mocked_snmp_interfaces(hostname, community, _):