diff --git a/nixos/tests/ncps.nix b/nixos/tests/ncps.nix
index ecda50d5f92d..87b1c33424b8 100644
--- a/nixos/tests/ncps.nix
+++ b/nixos/tests/ncps.nix
@@ -66,7 +66,7 @@
     ''
       start_all()
 
-      harmonia.wait_for_unit("harmonia.service")
+      harmonia.wait_for_unit("harmonia.socket")
 
       ncps.wait_for_unit("ncps.service")