diff --git a/src/test/ui/run-pass/issues/issue28498-ugeh-ex1.rs b/src/test/ui/run-pass/issues/issue28498-ugeh-ex1.rs
index d566b2ab113c1..50baa2975dd92 100644
--- a/src/test/ui/run-pass/issues/issue28498-ugeh-ex1.rs
+++ b/src/test/ui/run-pass/issues/issue28498-ugeh-ex1.rs
@@ -9,6 +9,8 @@
 // except according to those terms.
 
 // run-pass
+#![allow(deprecated)] // FIXME: switch to `#[may_dangle]` below.
+
 // Example taken from RFC 1238 text
 
 // https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
diff --git a/src/test/ui/run-pass/issues/issue28498-ugeh-with-lifetime-param.rs b/src/test/ui/run-pass/issues/issue28498-ugeh-with-lifetime-param.rs
index 72e1317cce9d8..0fff6507833fb 100644
--- a/src/test/ui/run-pass/issues/issue28498-ugeh-with-lifetime-param.rs
+++ b/src/test/ui/run-pass/issues/issue28498-ugeh-with-lifetime-param.rs
@@ -9,6 +9,8 @@
 // except according to those terms.
 
 // run-pass
+#![allow(deprecated)] // FIXME: switch to `#[may_dangle]` below.
+
 // Demonstrate the use of the unguarded escape hatch with a lifetime param
 // to assert that destructor will not access any dead data.
 //
diff --git a/src/test/ui/run-pass/issues/issue28498-ugeh-with-passed-to-fn.rs b/src/test/ui/run-pass/issues/issue28498-ugeh-with-passed-to-fn.rs
index 113994227e6eb..28645801db293 100644
--- a/src/test/ui/run-pass/issues/issue28498-ugeh-with-passed-to-fn.rs
+++ b/src/test/ui/run-pass/issues/issue28498-ugeh-with-passed-to-fn.rs
@@ -9,6 +9,8 @@
 // except according to those terms.
 
 // run-pass
+#![allow(deprecated)] // FIXME: switch to `#[may_dangle]` below.
+
 // Demonstrate the use of the unguarded escape hatch with a type param in negative position
 // to assert that destructor will not access any dead data.
 //
diff --git a/src/test/ui/run-pass/issues/issue28498-ugeh-with-trait-bound.rs b/src/test/ui/run-pass/issues/issue28498-ugeh-with-trait-bound.rs
index c767799283334..7df3ceb7614d5 100644
--- a/src/test/ui/run-pass/issues/issue28498-ugeh-with-trait-bound.rs
+++ b/src/test/ui/run-pass/issues/issue28498-ugeh-with-trait-bound.rs
@@ -9,6 +9,8 @@
 // except according to those terms.
 
 // run-pass
+#![allow(deprecated)] // FIXME: switch to `#[may_dangle]` below.
+
 // Demonstrate the use of the unguarded escape hatch with a trait bound
 // to assert that destructor will not access any dead data.
 //