diff --git a/src/Language/Brainfuck.hs b/src/Language/Brainfuck.hs
index c348315..ffcbb42 100644
--- a/src/Language/Brainfuck.hs
+++ b/src/Language/Brainfuck.hs
@@ -100,6 +100,7 @@ render = Text.concat . List.map renderSingle . Vector.toList
 
 -- >>> import Test.QuickCheck.Instances.Vector ()
 -- >>> import Test.QuickCheck.Arbitrary (arbitrary)
+-- >>> import Test.QuickCheck.Gen as Gen
 -- >>> render <$> Gen.generate arbitrary
--- "<,<>,<,."
+-- "-<,.<<,>++.[]<+>.<.-,"