diff --git a/nixos/tests/harmonia.nix b/nixos/tests/harmonia.nix
index 3057caf70160..6cf9ad4d2335 100644
--- a/nixos/tests/harmonia.nix
+++ b/nixos/tests/harmonia.nix
@@ -8,6 +8,7 @@
       services.harmonia = {
         enable = true;
         signKeyPath = pkgs.writeText "cache-key" "cache.example.com-1:9FhO0w+7HjZrhvmzT1VlAZw4OSAlFGTgC24Seg3tmPl4gZBdwZClzTTHr9cVzJpwsRSYLTu7hEAQe3ljy92CWg==";
+        settings.priority = 35;
       };
 
       networking.firewall.allowedTCPPorts = [ 5000 ];
@@ -26,7 +27,8 @@
     start_all()
 
     harmonia.wait_for_unit("harmonia.service")
-    client01.wait_until_succeeds("curl -f http://harmonia:5000/nix-cache-info")
+
+    client01.wait_until_succeeds("curl -f http://harmonia:5000/nix-cache-info | grep '${toString nodes.harmonia.services.harmonia.settings.priority}' >&2")
     client01.succeed("curl -f http://harmonia:5000/version | grep '${nodes.harmonia.services.harmonia.package.version}' >&2")
 
     client01.succeed("cat /etc/nix/nix.conf >&2")