diff --git a/src/test/run-fail/args-panic.rs b/src/test/run-fail/args-panic.rs
index 4878ec59fd4..eab7475bc86 100644
--- a/src/test/run-fail/args-panic.rs
+++ b/src/test/run-fail/args-panic.rs
@@ -11,6 +11,9 @@
 
 // error-pattern:meep
 
+#![allow(unknown_features)]
+#![feature(box_syntax)]
+
 fn f(_a: int, _b: int, _c: Box<int>) { panic!("moop"); }
 
 fn main() { f(1, panic!("meep"), box 42); }
diff --git a/src/test/run-fail/panic-macro-any-wrapped.rs b/src/test/run-fail/panic-macro-any-wrapped.rs
index e25390a7986..89e47bf46ab 100644
--- a/src/test/run-fail/panic-macro-any-wrapped.rs
+++ b/src/test/run-fail/panic-macro-any-wrapped.rs
@@ -10,6 +10,9 @@
 
 // error-pattern:panicked at 'Box<Any>'
 
+#![allow(unknown_features)]
+#![feature(box_syntax)]
+
 fn main() {
     panic!(box 612_i64);
 }
diff --git a/src/test/run-fail/panic-macro-any.rs b/src/test/run-fail/panic-macro-any.rs
index b73c66c4f21..231c57390b3 100644
--- a/src/test/run-fail/panic-macro-any.rs
+++ b/src/test/run-fail/panic-macro-any.rs
@@ -10,6 +10,9 @@
 
 // error-pattern:panicked at 'Box<Any>'
 
+#![allow(unknown_features)]
+#![feature(box_syntax)]
+
 fn main() {
     panic!(box 413i as Box<::std::any::Any+Send>);
 }
diff --git a/src/test/run-fail/unique-panic.rs b/src/test/run-fail/unique-panic.rs
index 07c9a21c5c1..9f643c09795 100644
--- a/src/test/run-fail/unique-panic.rs
+++ b/src/test/run-fail/unique-panic.rs
@@ -9,4 +9,8 @@
 // except according to those terms.
 
 // error-pattern: panic
+
+#![allow(unknown_features)]
+#![feature(box_syntax)]
+
 fn main() { box panic!(); }
diff --git a/src/test/run-fail/unwind-unique.rs b/src/test/run-fail/unwind-unique.rs
index 6b5aefbab80..f39ded8f98e 100644
--- a/src/test/run-fail/unwind-unique.rs
+++ b/src/test/run-fail/unwind-unique.rs
@@ -10,6 +10,8 @@
 
 // error-pattern:fail
 
+#![allow(unknown_features)]
+#![feature(box_syntax)]
 
 fn failfn() {
     panic!();