diff --git a/datagateway_api/config.yaml.example b/datagateway_api/config.yaml.example
index a7256112..eacc3330 100644
--- a/datagateway_api/config.yaml.example
+++ b/datagateway_api/config.yaml.example
@@ -22,5 +22,7 @@ debug_mode: false
 generate_swagger: false
 host: "127.0.0.1"
 port: "5000"
-test_user_credentials: {"username": "root", "password": "pw"}
+test_user_credentials:
+  username: "root"
+  password: "pw"
 test_mechanism: "simple"