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diff --git a/tests/ui/traits/issue-43784-supertrait.stderr b/tests/ui/traits/issue-43784-supertrait.stderr
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+error[E0277]: the trait bound `T: Copy` is not satisfied
+  --> $DIR/issue-43784-supertrait.rs:8:22
+   |
+LL | impl<T> Complete for T {}
+   |                      ^ the trait `Copy` is not implemented for `T`
+   |
+note: required for `T` to implement `Partial`
+  --> $DIR/issue-43784-supertrait.rs:1:11
+   |
+LL | pub trait Partial: Copy {
+   |           ^^^^^^^
+note: required by a bound in `Complete`
+  --> $DIR/issue-43784-supertrait.rs:4:21
+   |
+LL | pub trait Complete: Partial {
+   |                     ^^^^^^^ required by this bound in `Complete`
+help: consider restricting type parameter `T`
+   |
+LL | impl<T: std::marker::Copy> Complete for T {}
+   |       +++++++++++++++++++
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.