Some comments.

diff --git a/Test.hs b/Test.hs
index 5672895..b1405da 100644
--- a/Test.hs
+++ b/Test.hs
@@ -1,4 +1,6 @@
 {-# LANGUAGE OverloadedStrings, TemplateHaskell #-}
+-- | Test server
+module Main where

 import Data.Object.Yaml
 import Data.Convertible.Base
diff --git a/TestCall.hs b/TestCall.hs
index 6beb7d8..c865b0b 100644
--- a/TestCall.hs
+++ b/TestCall.hs
@@ -1,4 +1,6 @@
 {-# LANGUAGE OverloadedStrings, TemplateHaskell #-}
+-- | Test client
+module Main where

 import Data.Object.Yaml
 import Data.Convertible.Base