diff --git a/tests/test-sources/plugins/git/gitgutter.nix b/tests/test-sources/plugins/git/gitgutter.nix
new file mode 100644
index 00000000..52d42d99
--- /dev/null
+++ b/tests/test-sources/plugins/git/gitgutter.nix
@@ -0,0 +1,41 @@
+{ lib, pkgs, ... }:
+{
+  empty = {
+    plugins.gitgutter.enable = true;
+  };
+
+  grep-command =
+    { config, ... }:
+    {
+      plugins.gitgutter = {
+        enable = true;
+        grep = {
+          package = pkgs.gnugrep;
+          command = "";
+        };
+      };
+      assertions = [
+        {
+          assertion =
+            config.extraPackages != [ ] && lib.any (x: x.pname or null == "gnugrep") config.extraPackages;
+          message = "gnugrep wasn't found when it was expected";
+        }
+      ];
+    };
+
+  no-packages =
+    { config, ... }:
+    {
+      globals.gitgutter_git_executable = lib.getExe pkgs.git;
+      plugins.gitgutter = {
+        enable = true;
+        gitPackage = null;
+      };
+      assertions = [
+        {
+          assertion = lib.all (x: x.pname or null != "git") config.extraPackages;
+          message = "A git package found in extraPackages when it wasn't expected";
+        }
+      ];
+    };
+}