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diff --git a/testsuite/tests/ghc-api/annotations/Test17519.hs b/testsuite/tests/ghc-api/annotations/Test17519.hs
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+{-# LANGUAGE RankNTypes #-}
+{-# LANGUAGE UnicodeSyntax #-}
+module Test17519 where
+
+type family Proxy2' ∷ ∀ k → k → Type where
+ Proxy2' = Proxy'