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diff --git a/ghc/compiler/tests/rename/rn015.hs b/ghc/compiler/tests/rename/rn015.hs
new file mode 100644
index 0000000..8520347
--- /dev/null
+++ b/ghc/compiler/tests/rename/rn015.hs
@@ -0,0 +1,19 @@
+--!!! Class and instance decl
+
+module Test where
+
+class K a where
+	op1 :: a -> a -> a
+	op2 :: Int -> a
+
+instance K Int where
+	op1 a b = a+b
+	op2 x   = x
+
+instance K Bool where
+	op1 a b = a
+	-- Pick up the default decl for op2
+	
+instance K [a] where
+	op3 a = a	-- Oops!  Isn't a class op of K
+