diff --git a/tests/fixtures/test_env_contract.json b/tests/fixtures/test_env_contract.json
index e662d698..6bc862a3 100644
--- a/tests/fixtures/test_env_contract.json
+++ b/tests/fixtures/test_env_contract.json
@@ -64,6 +64,7 @@
     "KAFKA": ["URL", "HOST", "PORT", "CONTAINER"],
     "RABBITMQ": ["URL", "HOST", "PORT"],
     "MQTT": ["URL", "AUTH_URL", "TLS_URL", "EMQX_URL", "USERNAME", "PASSWORD", "CA_FILE"],
+    "NATS": ["URL"],
     "SMTP": ["HOST", "PORT"],
     "IMAP": ["HOST", "PORT"],
     "MAIL_TLS": ["HOST", "CA_FILE"],