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diff --git a/src/test/ui/higher-rank-trait-bounds/normalize-under-binder/issue-90950.stderr b/src/test/ui/higher-rank-trait-bounds/normalize-under-binder/issue-90950.stderr
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+error[E0277]: the trait bound `for<'a> <_ as Yokeable<'a>>::Output: IsCovariant<'a>` is not satisfied
+ --> $DIR/issue-90950.rs:50:12
+ |
+LL | upcast(y)
+ | ------ ^ the trait `for<'a> IsCovariant<'a>` is not implemented for `<_ as Yokeable<'a>>::Output`
+ | |
+ | required by a bound introduced by this call
+ |
+ = help: the trait `IsCovariant<'a>` is implemented for `std::borrow::Cow<'a, T>`
+note: required by a bound in `upcast`
+ --> $DIR/issue-90950.rs:27:42
+ |
+LL | fn upcast<Y>(x: Yoke<Y>) -> Yoke<Box<dyn IsCovariant<'static> + 'static>> where
+ | ------ required by a bound in this
+LL | Y: for<'a> Yokeable<'a>,
+LL | for<'a> <Y as Yokeable<'a>>::Output: IsCovariant<'a>
+ | ^^^^^^^^^^^^^^^ required by this bound in `upcast`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.