1 files changed, 18 insertions, 0 deletions
diff --git a/testsuite/tests/polykinds/T15874.hs b/testsuite/tests/polykinds/T15874.hs
new file mode 100644
index 0000000000..fd560db095
--- /dev/null
+++ b/testsuite/tests/polykinds/T15874.hs
@@ -0,0 +1,18 @@
+{-# Language RankNTypes   #-}
+{-# Language DataKinds    #-}
+{-# Language PolyKinds    #-}
+{-# Language GADTs        #-}
+{-# Language TypeFamilies #-}
+
+module T15874 where
+
+import Data.Kind
+
+data Var where
+  Op :: Var
+  Id :: Var
+
+type Varianced = (forall (var :: Var). Type)
+
+data family   Parser :: Varianced
+data instance Parser = P