1 files changed, 12 insertions, 0 deletions
diff --git a/nixpkgs/nixos/lib/testing/call-test.nix b/nixpkgs/nixos/lib/testing/call-test.nix
new file mode 100644
index 000000000000..9abcea07455e
--- /dev/null
+++ b/nixpkgs/nixos/lib/testing/call-test.nix
@@ -0,0 +1,12 @@
+{ config, lib, ... }:
+let
+  inherit (lib) mkOption types;
+in
+{
+  options = {
+    result = mkOption {
+      internal = true;
+      default = config;
+    };
+  };
+}