diff --git a/tests/default.nix b/tests/default.nix
new file mode 100644
index 00000000..cadd0c70
--- /dev/null
+++ b/tests/default.nix
@@ -0,0 +1,5 @@
+{ pkgs ? import <nixpkgs> { } }:
+
+{
+  lib = import ./lib { inherit pkgs; };
+}
diff --git a/tests/lib/default.nix b/tests/lib/default.nix
new file mode 100644
index 00000000..eb4802ce
--- /dev/null
+++ b/tests/lib/default.nix
@@ -0,0 +1,20 @@
+{ pkgs }:
+
+let
+  inherit (pkgs) lib;
+  foodogsquaredLib = (import ../../lib { inherit pkgs; }).extend (final: prev:
+  let
+    callLib = file: import file { inherit pkgs lib; self = prev; };
+  in
+  {
+    nixos = callLib ../../lib/nixos.nix;
+    home-manager = callLib ../../lib/home-manager.nix;
+    nixvim = callLib ../../lib/nixvim.nix;
+  });
+
+  callLib = file: import file { inherit pkgs lib; self = foodogsquaredLib; };
+in
+{
+  trivial = callLib ./trivial.nix;
+  #home-manager = callLib ./home-manager.nix;
+}
diff --git a/tests/lib/trivial.nix b/tests/lib/trivial.nix
new file mode 100644
index 00000000..1248bcbc
--- /dev/null
+++ b/tests/lib/trivial.nix
@@ -0,0 +1,20 @@
+{ pkgs, lib, self }:
+
+lib.runTests {
+  testCountAttrs = {
+    expr = self.trivial.countAttrs (n: v: v?enable && v.enable) {
+      hello.enable = true;
+      what.enable = false;
+      atro.enable = true;
+      adelie = { };
+      world = "there";
+      mo = null;
+    };
+    expected = 2;
+  };
+
+  testGetConfig = {
+    expr = self.trivial.getConfig "home-manager" "foo-dogsquared";
+    expected = ../../configs/home-manager/foo-dogsquared;
+  };
+}