diff --git a/nix/lib/default.nix b/nix/lib/default.nix
index 5fee45f..bbb1564 100644
--- a/nix/lib/default.nix
+++ b/nix/lib/default.nix
@@ -8,6 +8,8 @@ libO
 
   # groups
 
+  modules = libO.modules // lib.importFlakeMod ./modules.nix;
+
   types = libO.types // lib.importFlakeMod ./types.nix;
 
   x-banananetwork-unused = lib.importFlakeMod ./unused.nix;
diff --git a/nix/lib/modules.nix b/nix/lib/modules.nix
new file mode 100644
index 0000000..97091ab
--- /dev/null
+++ b/nix/lib/modules.nix
@@ -0,0 +1,9 @@
+{ lib, ... }@flakeArg:
+let
+  inherit (lib.modules) mkOverride;
+in
+{
+
+  mkTestOverride = mkOverride 55;
+
+}