diff --git a/tests/Render.hs b/tests/Render.hs
index db6246b..44c5228 100644
--- a/tests/Render.hs
+++ b/tests/Render.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE TypeApplications #-}
 module Render
   ( main