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diff --git a/testsuite/tests/deriving/should_fail/drvfail013.hs b/testsuite/tests/deriving/should_fail/drvfail013.hs
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+
+-- Test for trac #1588: unrequested generalized newtype deriving?
+
+newtype MaybeT m a = MaybeT { runMaybeT :: m (Maybe a) } deriving Eq
+
+data MaybeT' m a = MaybeT' { runMaybeT' :: m (Maybe a) } deriving Eq