diff --git a/nixos/tests/ncps-ha-pg-redis.nix b/nixos/tests/ncps-ha-pg-redis.nix
index 9d65f4de720c..80b8925b38e9 100644
--- a/nixos/tests/ncps-ha-pg-redis.nix
+++ b/nixos/tests/ncps-ha-pg-redis.nix
@@ -180,7 +180,7 @@ in
 
       start_all()
 
-      harmonia.wait_for_unit("harmonia.service")
+      harmonia.wait_for_unit("harmonia.socket")
 
       ncps0.wait_for_unit("ncps.service")
       ncps1.wait_for_unit("ncps.service")