diff --git a/testsuite/tests/polykinds/T9222.hs b/testsuite/tests/polykinds/T9222.hs
new file mode 100644
index 0000000000000000000000000000000000000000..df112519ac6b83995552175286d9c96d46d13907
--- /dev/null
+++ b/testsuite/tests/polykinds/T9222.hs
@@ -0,0 +1,7 @@
+{-# LANGUAGE RankNTypes, GADTs, DataKinds, PolyKinds, TypeOperators, TypeFamilies #-}
+module T9222 where
+
+import Data.Proxy
+
+data Want :: (i,j) -> * where
+  Want :: (a ~ '(b,c) => Proxy b) -> Want a
diff --git a/testsuite/tests/polykinds/all.T b/testsuite/tests/polykinds/all.T
index 96faa6725ba01cc45c4eb3f9672e50396a95c3cb..de73b371eadaeca9a7bea505c61185f47bbed36e 100644
--- a/testsuite/tests/polykinds/all.T
+++ b/testsuite/tests/polykinds/all.T
@@ -101,3 +101,4 @@ test('T7481', normal, compile_fail,[''])
 test('T8705', normal, compile, [''])
 test('T8985', normal, compile, [''])
 test('T9106', normal, compile_fail, [''])
+test('T9222', normal, compile, [''])