diff --git a/stix2/test/v21/test_datastore_relational_db.py b/stix2/test/v21/test_datastore_relational_db.py
index 6e8f33da..770d284c 100644
--- a/stix2/test/v21/test_datastore_relational_db.py
+++ b/stix2/test/v21/test_datastore_relational_db.py
@@ -5,7 +5,7 @@
 import stix2.properties
 
 store = RelationalDBStore(
-    "postgresql://Postgres:5432/postgres",
+    "postgresql://0.0.0.0:5432/postgres",
     True,
     None,
     False,