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diff --git a/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.rs b/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.rs
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+++ b/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.rs
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+// Test that if we need to prove that `<T as MyTrait<'a>>::Output:
+// 'a`, but we only know that `<T as MyTrait<'b>>::Output: 'a`, that
+// doesn't suffice.
+
+trait MyTrait<'a> {
+ type Output;
+}
+
+fn foo1<'a, 'b, T>() -> &'a ()
+where
+ for<'x> T: MyTrait<'x>,
+ <T as MyTrait<'b>>::Output: 'a,
+{
+ bar::<<T as MyTrait<'a>>::Output>()
+ //~^ ERROR the associated type `<T as MyTrait<'_>>::Output` may not live long enough
+}
+
+fn bar<'a, T>() -> &'a ()
+where
+ T: 'a,
+{
+ &()
+}
+
+fn main() {}