diff --git a/datagateway_api/config.yaml.example b/datagateway_api/config.yaml.example
index d46d7342..486a6668 100644
--- a/datagateway_api/config.yaml.example
+++ b/datagateway_api/config.yaml.example
@@ -22,5 +22,5 @@ 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"