diff --git a/tests/substitution.nix b/tests/substitution.nix
index 0cffbd5..ad1aea6 100644
--- a/tests/substitution.nix
+++ b/tests/substitution.nix
@@ -22,7 +22,8 @@ pkgs.testers.runNixOSTest (_: {
           host = "cache";
         };
         caches = {
-          cache.port = 8000;
+          cache.grpcListenAddress = "[::1]:5000";
+          cache.narBridgeListenAddress = "[::1]:8000";
         };
       };
 
@@ -45,7 +46,7 @@ pkgs.testers.runNixOSTest (_: {
     import time
     start_all()
     cache.wait_for_unit("nginx.service")
-    cache.wait_for_unit("tvix-store-cache.service")
+    cache.wait_for_unit("narbridge-cache.service")
     time.sleep(1)
     with subtest("Nar bridge home"):
         cache.succeed("curl -f http://127.0.0.1/cache/nix-cache-info")