diff --git a/tests/test-sources/plugins/ui/specs.nix b/tests/test-sources/plugins/ui/specs.nix
new file mode 100644
index 00000000..6a84fb4c
--- /dev/null
+++ b/tests/test-sources/plugins/ui/specs.nix
@@ -0,0 +1,64 @@
+{
+  empty = {
+    plugins.specs.enable = true;
+  };
+
+  example = {
+    plugins.specs = {
+      enable = true;
+      settings = {
+        show_jumps = true;
+        min_jump = 30;
+        popup = {
+          delay_ms = 0;
+          inc_ms = 10;
+          blend = 10;
+          width = 10;
+          winhl = "PMenu";
+          fader = ''
+            function(blend, cnt)
+                if cnt > 100 then
+                    return 80
+                else return nil end
+            end
+          '';
+          resizer = ''
+            function(width, ccol, cnt)
+                if width-cnt > 0 then
+                    return {width+cnt, ccol}
+                else return nil end
+            end
+          '';
+        };
+        ignore_filetypes = { };
+        ignore_buftypes = {
+          nofile = true;
+        };
+      };
+    };
+  };
+
+  defaults = {
+    plugins.specs = {
+      enable = true;
+      settings = {
+
+        show_jumps = true;
+        min_jump = 30;
+        popup = {
+          delay_ms = 10;
+          inc_ms = 5;
+          blend = 10;
+          width = 20;
+          winhl = "PMenu";
+          fader = "require('specs').linear_fader";
+          resizer = "require('specs').shrink_resizer";
+        };
+        ignore_filetypes = { };
+        ignore_buftypes = {
+          nofile = true;
+        };
+      };
+    };
+  };
+}