+ Add bitfield module.

1 files changed, 4 insertions, 0 deletions

diff --git a/tests/encoding.hs b/tests/encoding.hs
index a8490551..405d2eb1 100644
--- a/tests/encoding.hs
+++ b/tests/encoding.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE StandaloneDeriving #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 {-# OPTIONS -fno-warn-orphans #-}
 module Main (main) where
 
@@ -29,6 +31,8 @@ instance Arbitrary BlockIx where
 instance Arbitrary Block where
   arbitrary = Block <$> positive <*> positive <*> arbitrary
 
+deriving instance Arbitrary Bitfield
+
 instance Arbitrary Message where
   arbitrary = oneof
     [ pure KeepAlive