fix test module

utils/test/discovery.lua

@@ -1,5 +1,10 @@
 local include = require 'utils.test.include'
+local matching_path = '^__level__/(.+)$'
 
 for name in pairs(_G.package.loaded) do
-    include(name .. '_tests')
+    name = name:match(matching_path)
+    if name then
+        name = name:sub(1, -5)
+        include(name .. '_tests')
+    end
 end

utils/test/include.lua

@@ -9,6 +9,6 @@ end
 return function(name)
     local s, e = pcall(require, name)
     if not s and not file_is_missing(e) then
-        error(e, 2)
+        error(e, 10)
     end
 end