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diff --git a/testsuite/tests/ghci/prog007/C.hs b/testsuite/tests/ghci/prog007/C.hs
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+++ b/testsuite/tests/ghci/prog007/C.hs
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+{-# LANGUAGE OverlappingInstances #-}
+
+module C where
+
+import A
+import B
+
+class Class1 a => Class2 a
+
+instance Class2 B