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diff --git a/html-test/src/HiddenInstancesA.hs b/html-test/src/HiddenInstancesA.hs
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+{-# OPTIONS_HADDOCK hide #-}
+module HiddenInstancesA where
+
+-- | Should be visible
+class Foo a
+
+-- | Should be visible
+data Bar
+
+-- | Should be visible
+instance Foo Bar
+
+-- | Should *not* be visible
+data Baz
+
+-- | Should *not* be visible
+instance Foo Baz