diff --git a/nixos/tests/phabricator.nix b/nixos/tests/phabricator.nix
index 85faafd56899..fdc39393faea 100644
--- a/nixos/tests/phabricator.nix
+++ b/nixos/tests/phabricator.nix
@@ -54,7 +54,7 @@ import ./make-test.nix ({ pkgs, ... }: {
     client =
       { config, pkgs, ... }:
       { imports = [ ./common/x11.nix ];
-        services.xserver.desktopManager.kde5.enable = true;
+        services.xserver.desktopManager.plasma5.enable = true;
       };
   };