diff --git a/src/test/compile-fail/object-lifetime-default-elision.rs b/src/test/compile-fail/object-lifetime-default-elision.rs
index 371acd24da06..75ee0bdc9c7a 100644
--- a/src/test/compile-fail/object-lifetime-default-elision.rs
+++ b/src/test/compile-fail/object-lifetime-default-elision.rs
@@ -41,7 +41,6 @@ fn load0<'a>(ss: &'a Box<SomeTrait>) -> Box<SomeTrait> {
 
     deref(ss)
         //~^ ERROR cannot infer
-        //~| WARNING E0398
 }
 
 fn load1(ss: &SomeTrait) -> &SomeTrait {
diff --git a/src/test/compile-fail/object-lifetime-default-mybox.rs b/src/test/compile-fail/object-lifetime-default-mybox.rs
index c8fe197b92c0..b5c4e0c767b0 100644
--- a/src/test/compile-fail/object-lifetime-default-mybox.rs
+++ b/src/test/compile-fail/object-lifetime-default-mybox.rs
@@ -28,7 +28,6 @@ fn deref<T>(ss: &T) -> T {
 
 fn load0(ss: &MyBox<SomeTrait>) -> MyBox<SomeTrait> {
     deref(ss) //~ ERROR cannot infer
-        //~^ WARNING E0398
 }
 
 fn load1<'a,'b>(a: &'a MyBox<SomeTrait>,
@@ -40,5 +39,9 @@ fn load1<'a,'b>(a: &'a MyBox<SomeTrait>,
       //~| ERROR mismatched types
 }
 
+fn load2<'a>(ss: &MyBox<SomeTrait+'a>) -> MyBox<SomeTrait+'a> {
+    load0(ss) //~ WARNING E0398
+}
+
 fn main() {
 }