diff --git a/nixos/modules/tests/private-storage.nix b/nixos/modules/tests/private-storage.nix
index 8e08d847711c4c1414a89668845cd4d059cd6ab3..e628984d1836652ac92f9dd59065dd5757023f2b 100644
--- a/nixos/modules/tests/private-storage.nix
+++ b/nixos/modules/tests/private-storage.nix
@@ -79,7 +79,7 @@ import <nixpkgs/nixos/tests/make-test.nix> {
       };
   };
 
-  # Test the machine with a Perl program (sobbing).
+  # Test the machines with a Perl program (sobbing).
   testScript =
     ''
       # Start booting all the VMs in parallel to speed up operations down below.