diff --git a/packages/backend/test-federation/.config/dummy.yml b/packages/backend/test-federation/.config/dummy.yml
index e69de29bb2..605155e12d 100644
--- a/packages/backend/test-federation/.config/dummy.yml
+++ b/packages/backend/test-federation/.config/dummy.yml
@@ -0,0 +1 @@
+url: https://example.com/