diff --git a/config/test-fixtures/basic.tf b/config/test-fixtures/basic.tf
index 8a861b3e80..8d08f164a7 100644
--- a/config/test-fixtures/basic.tf
+++ b/config/test-fixtures/basic.tf
@@ -21,4 +21,10 @@ resource aws_instance "web" {
         "foo",
         "${aws_security_group.firewall.foo}"
     ]
+
+    network_interface = {
+      device_index = 0
+      description = "Main network interface"
+    }
+
 }