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-rw-r--r--testsuite/tests/polykinds/T11821a.hs4
-rw-r--r--testsuite/tests/polykinds/all.T1
2 files changed, 5 insertions, 0 deletions
diff --git a/testsuite/tests/polykinds/T11821a.hs b/testsuite/tests/polykinds/T11821a.hs
new file mode 100644
index 0000000000..da96fe2c56
--- /dev/null
+++ b/testsuite/tests/polykinds/T11821a.hs
@@ -0,0 +1,4 @@
+{-# LANGUAGE GADTs, TypeInType, ConstraintKinds #-}
+module T11821a where
+import Data.Proxy
+type SameKind (a :: k1) (b :: k2) = ('Proxy :: Proxy k1) ~ ('Proxy :: Proxy k2)
diff --git a/testsuite/tests/polykinds/all.T b/testsuite/tests/polykinds/all.T
index db0693230d..c5ec8ace85 100644
--- a/testsuite/tests/polykinds/all.T
+++ b/testsuite/tests/polykinds/all.T
@@ -147,6 +147,7 @@ test('T11648', normal, compile, [''])
test('T11648b', normal, compile_fail, [''])
test('KindVType', normal, compile_fail, [''])
test('T11821', normal, compile, [''])
+test('T11821a', normal, compile, [''])
test('T11640', normal, compile, [''])
test('T11554', normal, compile_fail, [''])
test('T12055', normal, compile, [''])