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diff --git a/testsuite/tests/polykinds/T19250.hs b/testsuite/tests/polykinds/T19250.hs
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+++ b/testsuite/tests/polykinds/T19250.hs
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+{-# LANGUAGE TypeOperators, TypeFamilies, ConstraintKinds, PolyKinds, DataKinds, EmptyDataDecls #-}
+
+module T19250 where
+
+import Data.Kind
+
+type Exp a = a -> Type
+
+type family Eval (e :: Exp a) :: a
+
+data Collapse :: [Constraint] -> Exp Constraint
+type instance Eval (Collapse '[]) = ()